Previous Events

Tuesday, September 8, 2020 - 14:00 to 15:00

Presenter: Rebecca Killick (Statistics, Lancaster University) Title: Introducing the Mean Locally Stationary Wavelet Process and its applications Microsoft Teams Meeting Summary: Most time series observed in practice exhibit first as well as second-order nonstationarity. In this presentation...

Tuesday, September 22, 2020 - 14:00 to 15:00

Title: Arithmetic Ramsey theory Presenter: Joel Moreira (University of Warwick) Microsoft Teams Meeting  Summary: In this talk I will present a survey of arithmetic Ramsey theory. This fascinating subject, which focuses on patterns which arise in arbitrary finite colourings o...

Tuesday, September 29, 2020 - 14:00 to 15:00

Presenter: Christina Pontin (University of Leeds) Title: Wave propagation and tidal dissipation in giant planets Microsoft Teams Meeting Summary: Understanding the internal structures of planets and stars, and their effects on the propagation and tidal forcing of internal waves, is an active a...

Tuesday, October 6, 2020 - 14:00 to 15:00

Speaker:   Matthew Turner (University of Warwick) Title:          Intrinsically motivated collective motion _______________________________________________________________________________ Join Microsoft Teams Meeting Learn more about Teams | ...

Thursday, October 8, 2020 - 09:00 to 10:00

Presented by Diane Butler and Andrew Potter

Thursday, October 8, 2020 - 13:00 to 14:00

Speaker: Robert Hasson, Catriona Queen and Kathleen Quinn (The Open University) Title: Addressing skills in Level 2 mathematics and statistics modules _______________________________________________________________________________ Join Microsoft Teams Meeting Learn more about Teams | Meeting...

Wednesday, October 14, 2020 - 13:00 to 14:00

Speaker: Leticia Pardo Simón (IMPAN) Title: Criniferous entire functions and Cantor bouquet Julia sets Microsoft Teams Meeting: Abstract: It is known for a large number of transcendental entire functions with bounded singular set that every escaping point can be connected to infinity by ...

Tuesday, October 20, 2020 - 10:00 to 11:00

Presented by June Barrow-Green and Brigitte Stenhouse For more details click here.  

Tuesday, October 20, 2020 - 13:00 to 14:00

Speaker: Susana Gomes (University of Warwick) Title: Parameter estimation for pedestrian dynamics models Summary: In this talk we present a framework for estimating parameters in macroscopic models for crowd dynamics using data from individual trajectories. We consider a model for the unidirectio...

Tuesday, October 27, 2020 - 14:00 to 15:30

Speaker: Kevin McConway (The Open University) Title: Communicating numbers and uncertainty to non-statisticians ......................................................................................................................................... Join Skype Meeting  ......

Tuesday, October 27, 2020 - 14:00 to 15:00

Title: Communicating numbers and uncertainty to non-statisticians Speaker: Prof. Kevin McConway (The Open University) Slides of the talk can be found here. Summary: As statisticians, we are used to working with and talking about uncertainty. Arguably, that’s our job. But we need ...

Wednesday, October 28, 2020 - 14:00 to 15:00

Speaker: Trevor Clark, The Open University Title: Real dynamics from the complex point of view ________________________________________________________________________________ Microsoft Teams meeting Join on your computer or mobile app Click here to join the meeting Learn More | Meeting ...

Friday, October 30, 2020 - 16:00 to 17:15

RSS President Deborah Ashby will chair a panel discussion about the history of statistics and the connections between some of the founding figures of the field with eugenics and racism. This is the first in a series of events that the RSS will be holding to advance the debate in this area and discus...

Tuesday, November 3, 2020 - 13:00 to 15:00

Speaker: Jeannette Janssen (Dalhousie University) Title: Quantifying linearly embedded structure in large graphs Microsoft Teams Meeting Abstract:  An important question in the study of large networks is to quantify when graphs are structurally similar. The theory of graph limits (Lovasz an...

Tuesday, November 10, 2020 - 14:00 to 15:00

Speaker: Nicole Snashall (University of Leicester and The Open University) Title: Cohomology and representation theory of finite-dimensional algebras Microsoft Teams Meeting Abstract: In this talk I will give an overview of some of my research on the cohomology of finite-dimensional algebras. Th...

Wednesday, November 11, 2020 - 14:00 to 15:00

Speaker: Petra Staynova, University of Derby Title: From Ramsey Theory to Combinatorics on Words: How a forgotten proof helped find long arithmetic progressions Abstract: The original proofs of classic Ramsey-theoretic results, such as van der Waerden's theorem, have been forgotten and r...

Friday, November 13, 2020 - 15:00 to 16:00

Title: From SSK to “Fisher Must Fall”: A Long View of the Controversy over R. A. Fisher’s Eugenics Speaker: Alex Aylward, University of Leeds   Friday, November 13, 3:00 pm., via zoom. (Email joseph.d.martin@durham.ac.uk for the link.)   Presented by the H...

Tuesday, November 17, 2020 - 14:00 to 15:00

Speaker: Sayantan Banerjee (IIM Indore) Title: Change-point Analysis in Financial Networks Abstract: A major impact of globalization has been the information flow across the financial markets rendering them vulnerable to financial contagion. Research has focused on network analysis...

Wednesday, November 18, 2020 - 14:00 to 15:00

Speaker: Nika Salia (Renyi Institute, Budapest) Title: Survey of Recent Generalisations of Erd\H{o}s--Gallai Theorems for Berge Hypergraphs Abstract: A problem, first considered by Erd\H{o}s and Gallai in 1959, was to determine Tur\'an number of paths and families of long cycles. In part...

Thursday, November 19, 2020 - 14:00 to 14:00

Tuesday, November 24, 2020 - 14:00 to 15:00

Speaker: Alex Diana (University of Kent) Title: A vector of softcore processes for modelling interactions between species using capture-recapture data Microsoft Teams Meeting Summary: Capture-recapture (CR) data and corresponding models have been used extensively to perform inference ...

Wednesday, November 25, 2020 - 14:00 to 15:00

Speaker: Liviana Palmisano, Durham University Title: Attractors and their stability Abstract:  One of the fundamental problems in dynamics is to understand the attractor of a system, i.e. the set where most orbits spent most of the time. As soon as the existence of an attractor is&...

Thursday, November 26, 2020 - 14:00 to 14:00

Wednesday, December 2, 2020 - 14:00 to 15:00

Speaker: Robert Brignall (The Open University) Title: Labeled well-quasi-order for permutation classes Abstract: In the study of (finite) combinatorial structures equipped with a quasi ordering (for example, graphs with the induced subgraph ordering), the notion that a class of structures is...

Thursday, December 3, 2020 - 14:00 to 15:00

Speaker: Trevor Collins (The Open University) Title: Qualitative analysis for Maths and Statistics Scholarship - Why Bother? Microsoft Teams Meeting Abstract: In this seminar we will discuss the distinctions between qualitative and quantitative research designs, and why qualitative and mixed met...

Wednesday, December 16, 2020 - 15:00 to 15:00

Speaker: David Bevan (\University of Strathclyde) Title: Limits of permutations and other discrete objects Abstract: I will present four (related) notions of convergence introduced recently for sequences of permutations, and some specific results, including the independence of permutation limits ...

Tuesday, January 12, 2021 - 14:00 to 15:00

Speaker: Mark Hodds (Coventry University) Title: Proving tailored support to improve mathematical understanding Summary:  Many students come to university underprepared for the mathematics on their courses, and some are even unaware that there is mathematics on their course. To address this,...

Wednesday, January 20, 2021 - 14:00 to 15:00

Speaker: Cristina Dalfó (Universitat de Lleida, Catalonia) Title: Spectra and eigenspaces from regular partitions of Cayley (di)graphs of permutation groups Abstract:  We present a method to obtain regular (or equitable) partitions of Cayley (di)graphs (that is, graphs, digraphs,...

Tuesday, February 2, 2021 - 14:00 to 15:00

Speaker: David Marchant (The Open University) Title: An expression for the Möbius function µ[σ,π] of the permutation pattern poset based on intervals in π Microsoft Teams Meeting Abstract: Balloon permutations are formed from the merge of two permutations, α and &bet...

Tuesday, February 9, 2021 - 14:00 to 15:00

Speaker: Nuno Sepulveda (Institute of Medical Immunology, Charité) Title: DNA methylation as a marker of disease diagnosis and aging of patients with Myalgic Encephalomyelitis/Chronic Fatigue Syndrome Summary:  Myalgic Encephalomyelitis/Chronic Fatigue Syndrome is a debilitating ...

Wednesday, February 17, 2021 - 14:00 to 15:00

Speaker: Josef Lauri (University of Malta) Title: Schur rings as a valuable resource in the algebraic graph theorist’s toolkit: an example with graphical regular representations  

Wednesday, February 24, 2021 - 14:00 to 15:00

Teams Meeting

Speaker: Anna Miriam Benini  (University of Parma) Title: Baker domains in one and two variables  For polynomial maps on the complex plane $\mathbb{C}$ there is only one way in which orbits can converge to infinity: they have to belong to the attracting basin of infinity, which can...

Tuesday, March 2, 2021 - 14:00 to 15:00

Speaker: Steven Gilmour (King’s College London) Title: Multi-objective optimal design of experiments Abstract: The statistical design of experiments has developed over the last 100 years to deal with different structures of experiments and data collected from them. Historically there have b...

Wednesday, March 3, 2021 - 14:00 to 15:00

Speaker: Robert Jajcay (Comenius University, Bratislava) Title: Extremal edge-girth-regular graphs Abstract: Edge-girth-regular graphs retain the local symmetry properties of highly symmetric (edge-transitive) graphs without necessarily admitting a large group of automorphisms. Moreover...

Wednesday, March 10, 2021 - 14:00 to 15:00

Speaker: James Waterman (University of Liverpool) Title: Docile entire functions Several important problems in complex dynamics are centered around the local connectivity of Julia sets of polynomials and of the Mandelbrot set. Importantly, when the Julia set of a polynomial is locally connected, t...

Thursday, March 11, 2021 - 14:00 to 15:00

Speaker: Katie Steckles Abstract: Outreach and public engagement are important to raise awareness and public opinion of mathematics, and to encourage people to study the subject. In this session maths communicator Katie Steckles will share her experience of working in a variety of outreach roles, d...

Wednesday, March 17, 2021 - 14:00 to 15:00

Speaker: Bridget Webb (Open University) Title: Fraïssé limits of Steiner triple systems Abstract: A mathematical structure is homogeneous if every isomorphism between two of its substructures can be extended to an automorphism of the whole. Fraïssé's theorem says ...

Tuesday, March 23, 2021 - 14:00 to 15:00

Speaker:   Jefferson Chaurais and Luiz Teixeria Jr (IntellTech and Universidade Fderal da Integracao Latino-Americana - UNILA, Foz do Iguacu) Title:     Tailings dam slope stability analysis using the WARIMAX-GARCH and DBSTAR forecasting models   Abstr...

Wednesday, March 24, 2021 - 14:00 to 15:00

Speakers:Farhana Pramy and Ben Mestel (The Open University) Title: A computer-assisted proof of magnetic-field growth for the Stretch-Fold-Shear model of a kinematic dynamo The Stretch-Fold-Shear family $S_\alpha$ is a one-parameter family of linear operators acting on complex-valued functions $c(x...

Wednesday, March 31, 2021 - 14:00 to 15:00

Speaker: Rob Lewis (Open University) Title: Extremal circulant graphs and where to find them Abstract: The goal of this talk is to present an efficient method for finding families of extremal circulant graphs of any given degree and infinite classes of diameters. This is a sub-problem o...

Wednesday, April 7, 2021 - 13:00 to 14:00

Speaker: Miquel Ángel Fiol (Universitat Politècnica de Catalunya, Barcelona) Title: Local spectra and symmetric powers of walk-regular graphs Abstract: The u-local spectrum of a graph G, introduced by Garriga, Yebra, and the speaker, consists of the local eigenvalues and m...

Tuesday, April 13, 2021 - 13:00 to 14:00

Speaker:   Andreas Wernecke (Max Planck Institute of Meteorology, Hamburg) Title:     Quantifying some century-scale uncertainties of the global mean sea level rise contribution from the Antactica's Amundsen Sea   Abstract: Predictions of the Antarctic...

Wednesday, April 14, 2021 - 13:00 to 14:00

Speaker: Athanasios Tsantaris (University of Nottingham) Title: Dynamics of Zorich maps In the theory of one dimensional holomorphic dynamics, one of the most well studied families of maps is the exponential family $E_\lambda(z):=\lambda e^z$. Zorich maps are the quasiregular higher dimensional an...

Wednesday, April 28, 2021 - 13:00 to 14:00

Speaker: Rhiannon Dougall (University of Bristol) Title:  Comparison of entropy for infinite covering manifolds, and group extensions of subshifts of finite type.  A classical example of an Anosov flow would be the geodesic flow associated to a compact hyperbolic manifold M. The periodic...

Thursday, April 29, 2021 - 13:00 to 14:00

Speaker:   Charlotte Webb and Rebecca Rosenberg (The Open University) Title:     Interactive online engagement for internal and external events Abstract: In this session we will look at using software such as Menti.com and Desmos to run real-time interactivities with...

Wednesday, May 12, 2021 - 13:00 to 14:00

Speaker: Dimitrios Ntalampekos (Stony Brook University) Abstract: The main object in this talk will be the mating of piecewise (anti-)analytic dynamical systems of the unit disk. While quasiconformal maps can be used for the mating of two hyperbolic dynamical systems, they are insufficient for mat...

Thursday, May 13, 2021 - 14:00 to 15:00

Speaker: Robert Hasson (The Open University) Marking remote exams remotely Abstract: When students take remote exams then we get folders of pdf files rather than boxes of paper scripts. This seminar describes a process for marking these pdfs in a way that mirrors the process for marking paper scri...

Wednesday, May 19, 2021 - 14:00 to 15:00

Speaker: Scott Hudson (University of South Wales) Title: An introduction to relational complexity Abstract: The relational complexity of a finite group acting on a finite set is a number that can be calculated for the action. In this talk relational complexity will be defined, illustrat...

Thursday, May 20, 2021 - 23:00 to 23:00

  The meeting is for researchers (particularly early-career researchers) in complex dynamics, function spaces, operator theory, geometric function theory, potential theory and related topics. We welcome participants of all career stages to attend. The deadline to apply to ...

Thursday, June 10, 2021 - 14:00 to 15:00

Speaker: Andrew Potter and Gerry Golding (The Open University) Abstract:  Since its first presentation in 2010B, MU123 Discovering mathematics has provided a gentle-yet-exciting whirlwind introduction to mathematics for over 30 000 Open University (OU) students. The module contributes to appr...

Wednesday, June 23, 2021 - 14:00 to 15:00

Speaker: Charlene Kalle (Leiden University) Title: Critical intermittency in random dynamical systems We consider a type of intermittent behaviour for random dynamical systems, where on the one hand the dynamics is attracted to some superattracting fixed point, but on the other hand orbits close t...

Thursday, July 15, 2021 - 14:00 to 15:00

Speaker: Carol Calvert and Rachel Hilliam (The Open University) Abstract: Statistics modules, not just at level 1, are taken by a wide variety of students on multiple qualifications. This talk will outline the size of the service teaching provision provided by statistics and focus on various ...

Wednesday, September 8, 2021 - 14:00 to 15:00

Speaker: Anna Zdunik, (University of Warsaw) Abstract: In this talk, I will discuss the questions of thermodynamic formalism in the context of transcendental dynamics: topological pressure, existence of conformal measures on the radial Julia set, Bowen’s formula and Ruelle’s property. I...

Wednesday, September 22, 2021 - 14:00 to 15:00

Speaker: George Kenison (TU Wien) An infinite sequence <u_n> of real numbers is holonomic if it satisfies a linear recurrence relation with polynomial coefficients. Such a sequence is positive if each u_n >= 0, and minimal if, given any other linearly independent sequence <v_n> satis...

Tuesday, October 5, 2021 - 14:00 to 15:00

Speaker:   Jared White (The Open University) Abstract: There are many ways to associate an algebra to a given locally compact group G; in this talk we shall introduce two of them: the group algebra L^1(G) and the measure algebra M(G). We shall give some background on the problem of c...

Wednesday, October 6, 2021 - 14:00 to 15:00

Speaker: Philipp Gohlke (Bielefeld University) The Thue-Morse measure is a paradigmatic example of a singular continuous measure that arises from a system of aperiodic order. Its properties have been studied extensively in the past, including a partly heuristic multifractal analysis in the mathemat...

Thursday, October 7, 2021 - 14:00 to 15:00

Speaker:   Carol Calvert and Rachel Hilliam (The Open University) Abstract: Statistics modules, not just at level 1, are taken by a wide variety of students on multiple qualifications. This talk will outline the size of the service teaching provision provided by statistics and focus on v...

Tuesday, October 12, 2021 - 14:00 to 15:00

Speaker:   Rachel Thomas (Plus Magazine) Abstract: I’ve become increasingly fascinated over the years by the role of curvature in mathematics and theoretical physics.   I'll talk about my experience learning and writing about curvature, from technical definitions to applic...

Tuesday, October 19, 2021 - 14:00 to 15:00

Speaker:   Sofía S. Villar (MRC Biostatistics Unit, University of Cambridge) Abstract:  The use of bandit algorithms to conduct response-adaptive randomised experiments may improve performance in terms of regret (or rewards) but it poses major problems for traditional statist...

Wednesday, October 20, 2021 - 14:00 to 15:00

Speaker: Neil Dobbs (University College Dublin) Abstract: Within hyperbolic components, the Hausdorff dimension of quadratic Julia sets varies analytically. On the boundary of the Mandelbrot set, on the other hand, it varies discontinuously. Indeed, there is a residual set of parameters (in the bou...

Tuesday, November 2, 2021 - 14:00 to 15:00

Speaker:   Michael Ewetola (University College London) Abstract: to follow

Thursday, November 4, 2021 - 14:00 to 15:00

Speaker:   Ben Mestel (The Open University) Abstract: In examina is cod Ciceronian Latin for Against examinations.  In this talk I will give a personal view of my experience of examinations (from both ends) and make a case for moving away from traditional examinations in ma...

Wednesday, November 10, 2021 - 14:00 to 15:00

Speaker: Ibai Aedo (The Open University) Abstract: We introduce substitutions of alphabets and explore their behaviour under iteration. This theory is enriched by considering collections of substitutions that generate semigroups of substitutions. Associated to each semigroup is a geometric object c...

Wednesday, November 10, 2021 - 15:30 to 16:30

Speaker: Vladislav Taranchuk  (University of Delaware)   Abstract: Over the past few decades, algebraically defined graphs have gained a lot of attention due to their applications to Turán type problems in graph theory and their connections to finite geometries. In this ...

Wednesday, November 17, 2021 - 14:00 to 15:00

Speaker: Stoyan Dimitrov (University of Illinois Chicago) Abstract: We show that if a permutation statistic can be written as a linear combination of bivincular patterns, then its moments can be expressed as a linear combination of factorials with constant coefficients. This generalizes a resu...

Tuesday, November 23, 2021 - 14:00 to 15:00

Speaker: Jim Smith (Warwick University) Abstract: Statistical models of criminal activities are challenging to implement. They often need to inform real time decision support tools that are able to identify suspicious activities associated with criminal plots as these progress in time. The observat...

Wednesday, November 24, 2021 - 14:00 to 15:00

Speaker: Anna Jové Campabadal (University of Barcelona) Abstract:  In this talk, we discuss the dynamics of the particular example f(z)=z+exp(-z), which presents infinitely many invariant doubly-parabolic Baker domains. In particular, we are interested in describing the topolo...

Tuesday, November 30, 2021 - 14:00 to 15:00

Speaker: Brigitte Stenhouse (The Open University) Abstract: Mary Somerville (1780-1872) was unequivocally one of the best-known mathematicians in Britain during the first half of the nineteenth-century. Barred from receiving a formal education, she tenaciously pursued her studies through indep...

Thursday, December 2, 2021 - 14:00 to 15:00

Speaker:   Stephen Serjeant (The Open University)   Abstract: Ironically for a distance education university, the OU is typically terrible at communicating >between< schools about our research and teaching. OU astrophysics research is now making extensive use of machine l...

Wednesday, December 8, 2021 - 14:00 to 15:00

Speaker: Toby Taylor Crush  (Loughborough University) Abstract: The distribution of digits in the continued fraction representation of a number was first discovered by Gauss, we approximate the distribution for random continued fractions with arbitrary accuracy by first approximating the ...

Wednesday, December 15, 2021 - 14:00 to 15:00

Speaker: Nick Gill (Open University) Abstract: Let G be a group acting on a set X. The relational complexity of this action is a positive integer that indicates how efficiently one can represent G as the automorphism group of a homogeneous relational structure with vertex set X. This horrible-...

Tuesday, January 4, 2022 - 14:00 to 15:00

Speaker: Rob Lewis (The Open University) Abstract:  We will discuss the degree-diameter problem for Abelian Cayley graphs, to find graphs with the largest possible number of vertices for a given maximum degree and diameter, denoted extremal graphs. No prior knowledge of graphs is assumed. Conn...

Tuesday, January 11, 2022 - 14:00 to 15:00

Speaker: Chikwesiri Imediegwu (The Open University) Abstract: Additive manufacturing has introduced new possibilities with respect to the types of shapes that are physically realizable. Material can be deposited only where it is needed and, taking cues from natural bone-like materials, co...

Wednesday, January 12, 2022 - 14:00 to 15:00

Speaker: Weiwei Cui (Centre for Mathematical Sciences, Lund University) Abstract: We discuss recent results on the Hausdorff dimension of Julia and escaping sets for meromorphic functions with finitely many singular values (i.e., Speiser functions). This is based on recent joint works with Mag...

Tuesday, January 18, 2022 - 14:00 to 15:00

Speaker:   Colette Christiansen (King's College + Open University) Abstract: Type 2 Diabetes is a global health concern, with diabetics susceptible to a number of complications including cardiovascular disease, kidney disease, blindness, deafness and amputation.  It is an il...

Wednesday, January 19, 2022 - 14:00 to 15:00

Speaker: Grahame Erskine (Open University) Abstract: The cage problem is a long-standing topic in extremal graph theory, with the object being to determine the smallest possible d-regular graph of given girth g. As the girth g becomes large, the best constructions we have are asymptotical...

Tuesday, January 25, 2022 - 14:00 to 15:00

Speaker: William Zwicker (Union College NY) Abstract:  A number of citation indices have been proposed for measuring and ranking the research publication records of scholars. Some of the best-known indices are designed to reward most highly those records that strike some balance between p...

Wednesday, January 26, 2022 - 14:00 to 15:00

Speaker: Jamie Walton (School of Mathematical Sciences-University of Nottingham)   Abstract: In extending the study of symbolic substitutions from finite to infinite alphabets, one encounters several obstacles to generalizing most of the standard theory. So instead of considering substitutio...

Tuesday, February 1, 2022 - 14:00 to 15:00

Speaker:   Penelope Lynch    Abstract: Using mathematical models to explore the novel concept that evolution can be exploited to drive desirable changes in malaria-vector mosquito populations, creating and sustaining new repellents and protecting existing tools from rapid l...

Wednesday, February 2, 2022 - 14:00 to 15:00

Speaker: Margaret Stanier (Open University) Abstract: We determine the spectra of a class of cartographic maps called Farey maps, which are regular maps on oriented surfaces defined by congruence subgroups of the modular group. Our strategy is to find some general results for those maps which ...

Tuesday, February 8, 2022 - 14:00 to 15:00

Speaker: Daniel Ayoubkhani/Matt Bosworth/Piotr Pawelek/Sasha King (from the ONS) Abstract: Most people infected with SARS-CoV-2 feel better within a few days or weeks of symptom onset but, for some people, the symptoms and their impact on day-to-day functioning can persist for much longer...

Wednesday, February 9, 2022 - 15:00 to 16:00

Speaker: Sebastien Biebler (Universite de Paris VII, MSRI) Abstract:  In the 60s, in a mathematical optimistic movement aiming to describe a typical dynamical system, Smale conjectured the density of uniform hyperbolicity in the space of C^r-diffeomorphisms f of a compact manifold M. In ...

Wednesday, February 16, 2022 - 14:00 to 15:00

Speaker: Katherine Staden (Open University) Abstract:  Questions about forbidden subgraphs form a central part of extremal graph theory. In this talk I will discuss a colourful problem of this sort: the Erdős-Rothschild problem from 1974. Consider an n-vertex graph G whose edges are colou...

Wednesday, February 23, 2022 - 14:30 to 15:30

Speaker: Olga Lukina (University of Vienna) Abstract:  Given a countable group G acting on a Cantor set X by transformations preserving a probability measure, the action is essentially free if the set of points with trivial stabilizers has full measure.  In this talk, we conside...

Wednesday, March 2, 2022 - 14:00 to 15:00

Speaker: Casey Tompkins (Rényi Institute, Budapest) Abstract: The poset Ramsey number R(Qm,Qn) is the smallest integer N such that any blue-red coloring of the elements of the Boolean lattice QN has a blue induced copy of Qm or a red induced copy of Qn. The weak poset Ramsey number Rw(...

Tuesday, March 8, 2022 - 14:00 to 15:00

Speaker:   Vinay Kathotia (Open University) Abstract: In recent years there has been increasing activity around making mathematics more inclusive – in schools and universities and via wider public engagement. In addition to asking what it means to make mathematics more inclusiv...

Wednesday, March 9, 2022 - 14:00 to 15:00

Speaker: Fabrizio Bianchi  (Laboratoire Paul Painlev, Lille) Abstract: In this talk we discuss stability of holomorphic dynamical systems under perturbation. In dimension 1, the theory is now classical and is based on works by Lyubich, Mané-Sad-Sullivan and DeMarco. I will review this t...

Tuesday, March 15, 2022 - 14:00 to 15:00

Speaker: Phil Dawid (University of Cambridge) Abstract: We consider modelling a stream of data arriving sequentially, but making no assumptions of independence, identical distribution, etc. Many standard concepts such as parametric consistency are not wholly adequate in this context, and need ...

Wednesday, March 23, 2022 - 14:00 to 15:00

Speaker: Nicolai Edeko (Institut für Mathematik, Universität Zürich)  Abstract: Given a dynamical system, heuristically, a factor is simpler than the original system. But what does this mean, concretely? For example, if a dynamical system has a certain topological/algebraic stru...

Tuesday, March 29, 2022 - 14:00 to 15:00

Speaker:   Vitaliy Kurlin (University of Liverpool) Abstract:  The strongest and most practical equivalence of periodic crystals is rigid motion or isometry preserving all interatomic distances. The Crystal Isometry Principle (CRISP) says [1] that all real non-equivalent crystal...

Tuesday, April 5, 2022 - 14:00 to 15:00

Speaker: Rachel Helme (University of Bristol) Abstract: For students who are labelled as low attaining in mathematics, the interpretation of their mathematical identity work, that is the way they talk, act, and be in relation to mathematics (Bishop, 2012), can be devoid of the voice of the stu...

Wednesday, April 6, 2022 - 14:00 to 15:00

Speaker: Ana Rodrigues (University of Exeter) Abstract: In this talk, I will discuss some features of the dynamics of Piecewise isometries (PWIs) which are higher dimensional generalizations of one dimensional IETs, defined on higher dimensional spaces and Riemannian manifolds. In particular, ...

Tuesday, April 19, 2022 - 14:00 to 15:00

Speaker: Sam Se-Jin Kim (University of Glasgow) Title: C*-simplicity of groupoids Abstract: Groupoids are a generalization of groups where mutliplication is only partially defined. This minor change in definition allows much broader objects to be defined through groupoids. For examp...

Wednesday, April 20, 2022 - 14:00 to 15:00

Speaker: Alvaro Bustos-Gajardo (The Open University)   Abstract: We discuss shift spaces constructed from indicator functions of number-theoretically defined sets, focusing mostly on their factorization properties (examples include the d-dimensional shift of visible lattice points a...

Tuesday, April 26, 2022 - 12:00 to 13:00

Speakers: Kaustubh Adhikari (M&S) and Francesco Crea (LHCS)  This will be held online     

Wednesday, April 27, 2022 - 14:00 to 15:00

Speaker: Klara Stokes (Umeå University, Sweden) Abstract: A rod configuration is a geometric realization of a rank two incidence geometry (a hypergraph) in terms of points and line segments of Euclidean space, together with a notion of motion that treats the line segments as rigid b...

Thursday, April 28, 2022 - 14:00 to 15:00

Speaker: Andrew Potter/Colin Blundell (The Open University) Abstract: As we emerge from the pandemic, blended/hybrid synchronous learning has attracted a lot of attention as a means of enabling the advantages of both face-to-face and online teaching and learning. We piloted ‘blended tuto...

Tuesday, May 3, 2022 - 14:00 to 15:00

Speaker:   Elsen Tjhung (The Open University) Abstract: The usual nematic phase in liquid crystals is formed by rod-shaped molecules. However, many liquid crystalline-forming molecules in nature are not straight. For instance, one can imagine banana-shaped or cone-shaped molecules, w...

Wednesday, May 4, 2022 - 14:00 to 15:00

Speaker: Simon Baker (University of Birmingham) Abstract: A real number x is said to be normal in base b if the sequence (b^n x) is uniformly distributed modulo one. In this talk I will discuss a recent result which states that for a self-similar measure and an integer b, if the self-similar m...

Monday, May 9, 2022 - 13:00 to 14:00

Speaker: Kevin McConway (M&S)

Tuesday, May 17, 2022 - 14:00 to 15:00

Speaker:   Andrew Neate (The Open University) Abstract: Nelson’s stochastic mechanics provides a link between a quantum mechanical state given by a wave function, and a diffusion process determined by a stochastic version of Newton’s second law of motion (Force = mass x &...

Wednesday, May 18, 2022 - 15:00 to 16:00

Speaker: Vasiliki Evdoridou (The Open University and MSRI, Berkeley) Abstract: In the iteration of holomorphic self-maps of the unit disc the dynamical behaviour of points in the disc is determined by the well-known Denjoy-Wolff theorem. Specifically for inner functions, there is a remarkable ...

Wednesday, May 25, 2022 - 14:00 to 15:00

Speaker: Olivia Jeans (The Open University) Abstract: An edge-biregular map is a highly symmetric map with an automorphism group which partitions the flag set of the map into two orbits in such a way that the action is not edge-transitive. Such maps necessarily have even valency and even face leng...

Tuesday, May 31, 2022 - 14:00 to 15:00

Speaker:   Paul Twine (Manchester University and The Open University) Abstract: A fundamental question in material science is how to find relationships between the microstructure and the macroscopic properties of a material.  Polycrystalline materials consist of grains, grain bound...

Wednesday, June 1, 2022 - 14:00 to 15:00

Speaker: Joanna Kulaga-Przymus (Nicolas Copernicus University, Torun-Poland) Abstract: I will give an introduction to the subject of Sarnak's conjecture (2010) and talk about the resulting interplay of number theory and dynamical systems, including some recent related results.  

Tuesday, June 7, 2022 - 14:00 to 15:00

Speaker: Xuewen Wu (Warwick University)    Abstract: Graph-based causal inference has recently been successfully applied to explore system reliability and to predict failures in order to improve systems. One popular causal analysis following Pearl and Spirtes et al. to study causal relatio...

Wednesday, June 8, 2022 - 14:00 to 15:00

Speaker: Chimere Anabanti (University of Pretoria, South Africa) Abstract:  A non-empty subset S of a group G is called a product-free set if S and SS have no element in common. Let S be a maximal by inclusion product-free set in a finite group G. We say that S fills G if every non-identi...

Tuesday, June 14, 2022 - 14:00 to 15:00

Speaker:   Victoria Brown (The Open University) Abstract: In this talk I will discuss modelling work undertaken with colleagues at Virginia Tech and Williams College that looks at potential allee effects in a transgenic mosquito population. Mosquitoes are vectors for a huge variety o...

Wednesday, June 15, 2022 - 14:00 to 15:00

Speaker: Thomas Richards (University of Warwick) Abstract: Blanchard, Devaney, and Keen proved that loops in the shift locus of degree $d$ polynomials induce automorphisms of the one-sided shift of $d$ symbols. Hubbard conjectured that an analogous result holds in H\'enon parameter space. ...

Wednesday, September 7, 2022 - 14:00 to 15:00

Speaker: Margaret Stanier (Faculty of STEM, The Open University) Abstract: Fundamental to the theory of continued fractions is the fact that every infinite continued fraction with positive coefficients converges. This is not the case, however, if the coefficients are not necessarily posit...

Wednesday, September 14, 2022 - 14:00 to 15:00

Speaker: Eric Rowland (Hofstra University) Abstract: Over the last 15 years there have been a number of papers studying congruence properties of sequences, such as the Catalan numbers, that arise in combinatorial settings. Proofs of these properties have relied on methods particular ...

Tuesday, September 20, 2022 - 14:00 to 15:00

Speaker:   Yasushi Nagai (Shinshu University) Abstract: In the context of mathematics of quasicrystals, ergodic theory and harmonic analysis, Rudin-Shapiro sequence is interesting because it has non-zero absolutely continuous diffraction spectrum. This sequence is constructed via a R...

Wednesday, September 21, 2022 - 14:00 to 15:00

Speaker: Bogusława Karpińska, (Warsaw University of Technology) Abstract: In this talk we present general estimates for the Hausdorff and packing dimension of sets of points which escape to infinity at a given rate under non-autonomous iteration of exponentials. In particular we discuss some condi...

Thursday, September 22, 2022 - 09:30 to Friday, September 23, 2022 - 17:00

      This two-day mini workshop will bring together mathematicians in the UK, Germany and Japan who are working on aperiodic order, exploring recent developments in the problem of identifying and classifying arithmetic structures present in sequences, point sets, and tilings, and ...

Tuesday, September 27, 2022 - 14:00 to 15:00

Speaker:   Iain McDonald (The Open University) Abstract:  Direct-to-consumer DNA testing is a burgeoning market, with around 40 million people tested. This offers societal challenges but also many opportunities. Here, I describe ongoing efforts to reproduce the movements of peop...

Wednesday, September 28, 2022 - 14:00 to 15:00

Speaker: Gabriela Araujo-Pardo (Universidad Nacional Autónoma de México) Abstract: A bipartite biregular (m,n;g)-graph Γ is a bipartite graph of even girth g having the degree set {m,n} and satisfying the additional property that the vertices in the same partite set have t...

Tuesday, October 11, 2022 - 13:30 to 14:30

Speaker: Katie Chicot (The Open University) Abstract: The UK is alone among the world’s 10 leading industrialised nations (China excepted) in having no public attraction dedicated to the discovery and celebration of mathematics. From MoMath in New York City to Seocho Math Museum in Seou...

Wednesday, October 19, 2022 - 14:00 to 15:00

Speaker: Sabrina Kombrink (Birmingham University) Abstract: We will discuss two applications of dynamical renewal theory in geometry. Firstly, we will look at asymptotic expansions of parallel volumes of fractal sets – aiming at introducing notions of “fractal volume”, “frac...

Wednesday, October 26, 2022 - 14:00 to 15:00

Speaker: Nacho López (Universitat de Lleida, Catalonia) Abstract: Moore graphs are extremal graphs that appear in the context of the degree/diameter problem. The fact that Moore graphs are very rare suggest the study of graphs that are, in some sense, close to being a Moore graph. ...

Tuesday, November 1, 2022 - 14:00 to 15:00

Speaker: Matty Van-Son (The Open University) Abstract: We discuss the history of Markov numbers, which are solutions to the equation x^2+y^2+z^2=3xyz. These solutions can be arranged to form a tree, and we show that similar trees of SL(2,Z) matrices, quadratic forms, and sequences of positive integ...

Tuesday, November 15, 2022 - 14:00 to 15:00

Speaker: Sylvia Nickerson (University of Toronto) Abstract. What drives the mathematician to pursue their subject area of interest? How does their self-concept, personal identity and metaphysical belief shape this research, if at all? This talk explores these questions in the lives, works and philo...

Wednesday, November 16, 2022 - 14:00 to 15:00

Speaker: Roger Thompson (The Open University) Abstract: In 2015, Jeandel and Rao proved that all tilesets with less than 11 tiles are finite or aperiodic. Using transducers in a brute force computer search, they found 25 candidate aperiodic tilesets with 11 tiles, and proved the aperiodicity of two...

Tuesday, November 22, 2022 - 14:00 to 15:00

Speaker: Thomas Machon (University of Bristol) Abstract: Helmholtz-Kirchoff dynamics of point vortices in an ideal fluid can be used as a model of quantum vortex dynamics in superfluids. Large collections of such vortices form hexagonal lattices. Vibrational modes of these lattices were s...

Wednesday, November 23, 2022 - 14:00 to 15:00

Speaker: Dan Cocks (The Open University)   Abstract: Many decision problems defined on a graph are generally hard, but are easy (i.e. an algorithm exists)  when restricted to graphs in certain classes. In particular, these include graphs from classes with bounded tree-width or ...

Tuesday, November 29, 2022 - 14:00 to 15:00

Speaker: John Parker (Durham University)   Abstract: A famous result of Margulis says that there is a universal constant only depending on dimension with the following property. If G is a discrete group of hyperbolic isometries and x is a point then the elements of G that displace x...

Tuesday, December 6, 2022 - 14:00 to 15:00

Speaker:  Vasyl Ustimenko (Royal Holloway, University of London) Abstract: For an arbitrary finite field Fq, q>2 we prove that known q-regular algebraic bipartite graphs A(n,q) on 2qn vertices have girth 2n or 2n+2. A similar result is formulated for more general graphs A(n,K...

Wednesday, December 14, 2022 - 14:00 to 15:00

Speaker: Juan Marshall-Maldonado (Aix-Marseille Uni) Abstract:   The spectral cocycle is an extension of the Rauzy-Veech cocycle, introduced by A. I. Bufetov et B. Solomyak. It is motivated by the study of twisted Birkhoff sums, which have been the focus of many recent works on the s...

Thursday, December 15, 2022 - 13:15 to 14:00

Speaker: Ivan Sudakow (The Open University) Abstract:  Didactic games can be a useful tool that, when coupled with traditional lectures, allows the student to become immersed in the subject, creating a kinetic and energetic environment that will not only help to learn but spark interest in th...

Wednesday, January 4, 2023 - 14:00 to 15:00

Speaker: Tatiana Jajcayová (Comenius University, Bratislava)   Abstract: In our talk, we will discuss our project of constructing uniform hypergraphs whose full automorphism group is isomorphic to a prescribed finite group G and acts regularly on the vertices of the hypergraph. Th...

Wednesday, January 25, 2023 - 14:00 to 15:00

Speaker: Dan Rust (The Open University) Abstract: Symbolic dynamics is a subject that benefits from many areas of mathematics, including topology, ergodic theory, operator theory, number theory and combinatorics. There has been a recent explosion in literature on 'set-valued' or 'random...

Thursday, February 23, 2023 - 14:00 to 15:00

Speaker:   Oleg Karpenkov (University of Liverpool) Title:     Gauss-Kuzmin statistics for faces of Klein polyhedra   Abstract: In this talk we consider multidimensional geometric continued fractions in the sense of Klein, which is an alternative approach to Ja...

Tuesday, March 7, 2023 - 14:00 to 15:00

Speaker:   Shaun Bullett (Queen Mary University of Londond) Title:     Holomorphic correspondences: matings, pinchings, tilings   Abstract: The multivalued dynamical system generated by the non-identity covering transformations of a pair of rational maps (P,Q) ...

Wednesday, March 8, 2023 - 14:00 to 15:00

Speaker: David Marti-Pete (University of Liverpool)  Abstract: The escaping set of an entire function consists of the points of the complex plane whose iterates tend to infinity. For a polynomial, the escaping set is an open neighbourhood of infinity, but for a transcendental entire ...

Tuesday, March 14, 2023 - 14:00 to 15:00

Speaker:   B. B. Cael (National Oceanography Centre) Abstract: Climate change is often understood in terms of the Earth’s energy budget.   Idealised energy balance models (EBMs) of climate are used for many applications, but it is not clear how they should represent non-l...

Wednesday, March 22, 2023 - 15:00 to 16:00

Speaker: Vasyl Ustimenko (Royal Holloway) Abstract: Homogeneous algebraic graphs defined over an arbitrary field are classical objects of Algebraic Geometry. This class includes geometries of Chevalley groups A_2(F), B_2(F) and G_2(F) defined over an arbitrary field F. Assume that codimension of ho...

Thursday, March 30, 2023 - 14:00 to 15:00

Speaker: Claudi Thomas, Sarah Mattingly, Cath Brown and Emma Steele (The OU) Abstract: The seminar will comprise of 5 short talks about student support initiatives on maths and stats modules as mentioned in the 2022 Quality Monitoring and Enhancement (QME) report: Quick respon...

Tuesday, April 4, 2023 - 14:30 to 15:15

Speakers: Peter Borg /Julien Portier Abstract: Domination, Isolation and the Art Gallery Theorem/On the total domination game and the ¾ conjecture   Abstract: Domination, Isolation and the Art Gallery Theorem (Peter Borg - (University of Malta) - 2.30pm) In 2017, ...

Wednesday, April 5, 2023 - 14:00 to 15:00

Speaker: Malavika Mukundan (University of Michigan) Abstract: Postsingularly finite holomorphic functions are entire functions for which the forward orbit of the set of critical and asymptotic values is finite. Motivated by previous work on approximating entire functions dynamically by polynomials,...

Tuesday, April 18, 2023 - 11:15 to 12:30

Speakers: Ivan Sudakow (M&S)/Gonzalo Garcia-Baquero (EEES)   The Mathematics of Climate Tipping Points Dr Ivan Sudakow (M&S) The Journey of a Quantitative Ecologist Dr Gonzalo Garcia-Baquero (EEES)

Wednesday, April 19, 2023 - 14:00 to 15:00

Speaker: Argyrios Christodoulou (Aristotle University of Thessaloniki) Abstract: We consider semigroups of Mobius transformations that exhibit strong contracting properties on the boundary of the hyperbolic plane. These objects are called uniformly hyperbolic semigroups and appear naturally in...

Tuesday, May 2, 2023 - 11:00 to 12:00

Speaker: Konstantinos Slavakis (Tokyo Institute of Technology) Abstract: This talk discusses a novel efficient multi-linear nonparametric (kernel-based) approximation framework for data regression and imputation, and its application to dynamic magnetic-resonance imaging (dMRI). The framework i...

Wednesday, May 3, 2023 - 14:00 to 15:00

Speaker: Rohini Ramadas (University of Warwick) Abstract: Per_n is a (nodal) Riemann surface parametrizing degree-2 rational functions with an n-periodic critical point. The n-th Gleason polynomial G_n is a polynomial in one variable with Z-coefficients, whose roots correspond to degree-2 poly...

Thursday, May 4, 2023 - 14:00 to 15:00

Speaker: Marcelo Montemurro (The Open University) Abstact: Across the higher education sector, there is an increased emphasis on incorporating transferrable skills development into the curriculum. At the OU, the Employability Framework was put in place with the aim of embedding emplo...

Wednesday, May 17, 2023 - 14:00 to 15:00

Speaker: Jordi Canela, (Universitat Jaume I)  Abstract: In this talk we will consider the dynamical system given by the iteration of a rational map Q over the Riemann Sphere. The dynamics of Q split the Riemann Sphere into two totally invariant sets. The Fatou set consists of all points z...

Tuesday, May 23, 2023 - 14:00 to 15:00

Speaker: Brigitte Stenhouse (Open University) Abstract: It is incredibly common when reading about a historical mathematician to briefly meet “his wife”. His wife is often introduced with a first name – a maiden name is provided slightly less frequently – and perha...

Wednesday, May 31, 2023 - 14:00 to 15:00

Speaker: Ronnie Pavlov (University of Denver) Abstract: The word complexity function p(n) of a subshift X measures the number of n-letter words appearing in sequences in X, and X is said to have linear complexity if p(n)/n is bounded. It's been known since work of Ferenczi that subshifts X with...

Thursday, June 1, 2023 - 14:00 to 15:00

Speakers: Mark H Jones, Anne-Marie Gallen, Anne Campbell (The Open University) Abstract: Our project explored student expectations and experiences of tuition in groups in both face-to-face and online settings. The study cohort was drawn from Stage 1 students on five modules from across th...

Wednesday, June 7, 2023 - 14:00 to 15:00

Speaker: Geoffrey Exoo (Indiana State University) Abstract: Some recent results on the search for extremal graphs with given degree and girth, diameter or geodecity are presented.  For degree and girth, we investigate a promising connection with strongly regular graphs. Two new meth...

Thursday, June 8, 2023 - 14:00 to 15:00

Speaker: Terry Griggs (The Open University) Abstract: There is a standard way of generalising a polygon (n–gon).  But the only finite examples are the polygons themselves or n = 3, 4, 6 or 8. In particular there are no generalised pentagons.  In 2012, Simeon Ball et alia p...

Tuesday, June 13, 2023 - 14:00 to 15:00

Speaker:  Katherine Staden (The Open University) Abstract:  Game theory is the study of situations of conflict and cooperation. It's a field which straddles the boundaries of mathematics and economics (to date, fifteen game theorists have won the Nobel Prize in Economics), a...

Wednesday, June 14, 2023 - 14:00 to 15:00

Speaker: Becca Winarski (College of the Holy Cross) Abstract: Thurston proved that a non-Lattés branched cover of the sphere to itself is either equivalent to a rational map (that is: conjugate via a mapping class), or has a topological obstruction. The Nielsen–Thurston classifica...

Tuesday, June 27, 2023 - 14:00 to 15:00

Speaker: Anthony Brown (University College Dublin) Abstract: We will introduce the concept of a non-homogeneous symmetric tensor product along with an associated norm, which plays the role of the projective norm on an ordinary tensor product. With the aid of a duality result, we will use...

Wednesday, June 28, 2023 - 14:00 to 15:00

Speaker: Maryam Hosseini (Queen Mary University of London) Abstract: Kakutani-Rokhlin partitions are appropriate tools in studying zero dimensional dynamical systems as these systems may appear in realizations of measure preserving ergodic systems on probability spaces. So the problem of exist...

Tuesday, September 12, 2023 - 14:00 to 15:00

Speaker: Dr Robin Mitra (UCL) Abstract: Synthetic data methods are being increasingly used to protect data confidentiality. Large sparse categorical data sets pose some significant challenges for synthesis which makes many traditional methods unsuitable. We explore using saturated count models...

Wednesday, October 11, 2023 - 14:00 to 15:00

Speaker: Roberto Florido Llinas (Universitat de Barcelona) Abstract: Meromorphic maps naturally arise from Newton’s root-finding method applied to an entire function F. In the transcendental case, Newton’s method may particularly fail to converge to the roots of F if the initial conditi...

Thursday, October 19, 2023 - 14:00 to 15:00

Speaker: Katharine Jewitt (The Open University) Abstract: The talk will present activities and findings from an eSTEeM-funded project which surveyed and interviewed ten ALs tutoring on computing modules to explore how Office 365 and Adobe Connect was being used to support active learning. Best...

Tuesday, October 24, 2023 - 12:00 to 13:00

Speaker: Dr Allison Barry (University of Oxford and University of Vienna)              Abstract: High-throughput sequencing techniques have revolutionised the identification of molecular markers for diseases. As we continue to accumulate data, we need effective str...

Tuesday, October 24, 2023 - 14:00 to 15:00

Speaker. Gabriela Marino Silva (University of Campinas, Brazil) Abstract. The underrepresentation of women in Science, Technology, Engineering, and Mathematics (STEM) has been gaining prominence in speeches by agencies of the United Nations System and, pervasively, in scientific organizations. Amon...

Wednesday, October 25, 2023 - 14:00 to 15:00

Speaker: Ziyu (Nero) Li (Imperial College London) Abstract: This work aims to introduce fractal geometry into graph theory. To do this, we present substitution graph systems and define box-counting dimension, Hausdorff dimension and especially degree dimension for graphs.   With the...

Wednesday, November 8, 2023 - 13:30 to 14:30

Speaker: Polina Vytnova (University of Surrey) Abstract: We combine the ideas developed in a recent joint work with M. Pollicott on Hausdorff dimension estimates, (Transactions of the AMS, Ser. B, Vol. 9, pp. 1102--1159) with the approach to systems with neutral fixed points by C. Wo...

Thursday, November 16, 2023 - 14:00 to 15:00

Speaker: Abi Kirk (The Open University) Abstract: This talk centres on a new design for an online Maths problem-solving session involving interaction and speech by students. The design has been conceived, implemented and evaluated during the presenter's eSTEeM project. There is evidence th...

Wednesday, November 29, 2023 - 13:30 to 14:30

Speaker: Alexander Clifton (Institute for Basic Science, Korea)   Abstract: We study how far one can deviate from optimal behavior when drawing a planar graph on a plane. For a planar graph G, we say that a plane subgraph H ⊆ G is a plane-saturated subgraph if adding ...

Monday, December 4, 2023 - 13:30 to 14:30

Speaker: Reem Yassawi (Queen Mary University of London)   Abstract: Let f:(X,T)—>(Y,T') be a factor map of topological dynamical systems. We say that  (X,T) is an  almost automorphic extension if for some y in Y, the f-preimage of y is a singleton.  In the case where...

Wednesday, January 10, 2024 - 13:30 to 14:30

Speaker: Julia Slipantschuk (University of Warwick) Abstract: Eigenvalues of transfer operators, known as Pollicott-Ruelle resonances provide insight into the long-term behaviour of the underlying dynamical system, in particular determining its exponential mixing rates. I will p...

Wednesday, January 24, 2024 - 13:30 to 14:30

Speaker: Leticia Pardo Simón (University of Manchester) Abstract: Given an entire map f with an attracting cycle, the points that converge under iteration to such cycle form an open set, known as basin of attraction. The boundaries of such basins lie in the Julia set- the locus of chaos...

Thursday, January 25, 2024 - 14:00 to 15:00

Speaker: Michael Wilkinson (The Open University) Abstract: Rainfall from ice-free clouds requires collisions of approximately one million microscopic droplets to create every raindrop. The collision rate for the first few droplet coalescences is very low, typically less than one per hour. Howe...

Wednesday, January 31, 2024 - 13:30 to 14:30

Speaker: Tymoteusz Chojecki (UMCS, Lublin, Poland)   Abstract: We study a family of graphs A(n,q). This is a family of small world graphs, which are given by some system of equations. Our field of interest is girth and diameter of these graphs. We use these graphs in post-quantum cr...

Wednesday, February 7, 2024 - 13:30 to 14:30

Speaker: Gandhar Joshi (The Open University) Abstract: We study monochromatic arithmetic progressions (MAPs) in automatic sequences. This was initially inspired by Van der Waerden’s celebrated theorem in Ramsay theory. Nagai et al. (2021) proved that MAPs in a particular class of constan...

Thursday, February 8, 2024 - 13:30 to 14:30

Speakers: Carol Calvert and James Warren (The Open University) Abstract:  In this study, we explore the use of a low-cost air quality monitor as an experiment within a first year undergraduate statistics setting. The aim is to enhance student engagement and to provide a basis for both ind...

Wednesday, February 14, 2024 - 13:30 to 14:30

Speaker: Mónica Reyes (Universitat de Lleida, Catalonia) Abstract: In graph theory, there are different operations that construct a "large" graph from a "smaller" one. Then, the question is what properties of the former can be deduced (or, at least, approximated) fro...

Wednesday, February 21, 2024 - 13:30 to 14:30

Speaker: Andrew Brown (University of Liverpool) Abstract: The strong Eremenko Conjecture was disproved in the paper of Rottenfußer, Rückert, Rempe and Schleicher with a counterexample function in the Eremenko—Lyubich Class B with infinite order growth. It was also shown in the...