
Displaying from Monday, October 01, 2018

October 2018

Friday 05 
16:00  SEMINAR  Groups and Combinatorics Seminar: Carlisle King, 4pm Oct 5 in Weatherburn LT

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Speaker: Carlisle King (University of Western Australia)
Title: Generation of finite simple groups
Time and place: 4pm Friday 5 Oct 2018, Weatherburn LT
Abstract: Let G be a finite simple group. It is wellknown that G is generated by a pair of elements – we say G (...)

Thursday 11 
16:00  SEMINAR  Mathematics and Statistics colloquium : Interface dynamics: new mechanisms of stabilization and destabilization and structure of flow fields

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Interfacial mixing and transport are nonequilibrium processes coupling kinetic to macroscopic scales. They occur in fluids, plasmas and materials, over celestial events to atoms. Grasping their fundamentals can advance a broad range of disciplines in science, mathematics, and engineering. This (...)

Friday 19 
16:00  SEMINAR  Groups and Combinatorics Seminar: Saul Freedman, 4pm Oct 19 in Weatherburn LT

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Speaker: Saul Freedman (University of Western Australia)
Title: pgroups related to exceptional Chevalley groups
Time and place: 4pm Friday 19 Oct 2018, Weatherburn LT
Abstract: In 1978, Bryant and Kovács proved that if H is a subgroup of the
general linear group GL( (...)


November 2018

Thursday 01 
16:00  SEMINAR  Mathematics and Statistics colloquium : Generalisations and variations of the Monty Hall Problem

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The Monty Hall problem is a probability puzzle based on an American television game show. Some generalisations of the original problem are considered here:
 The probability distribution is generalised from equal likelihood to an arbitrary known prior distribution, with the number of doors changed (...)

Friday 02 
16:00  SEMINAR  Groups and Combinatorics Seminar: Kyle Rosa, 4pm Nov 02 in Weatherburn LT

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Speaker: Kyle Rosa (University of Western Australia)
Title: Bounds for Semiprimitive Permutation Groups
Time and place: 4pm Friday 2 Nov 2018, Weatherburn LT
Abstract: Semiprimitive groups are permutation groups for which every normal subgroup is either transitive (...)

Thursday 22 
16:00  SEMINAR  Mathematics and Statistics colloquium : Nonlocal equations, atom dislocation dynamics in crystals, and chaotic orbits

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In this talk, we introduce some basics of nonlocal equations, with some applications in mind coming from physics and material sciences.
In particular, the equation taken into account comes from a model, developed by Rudolf Peierls and Frank Nabarro, that describes the edge dislocation of atoms in (...)

Friday 23 
16:00  SEMINAR  Groups and Combinatorics Seminar: Marvin Krings, 4pm Nov 23 in Robert Street LT

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Speaker: Marvin Krings (RWTH, Aachen)
Title: The ppart of the order of an almost simple group of Lie type
Time and place: 4pm Friday 23 Nov 2018, Robert Street LT (not Weatherburn LT)
Abstract: Primitive permutation groups are fundamental building blocks in the (...)


February 2019

Friday 01 
16:00  SEMINAR  Groups and Combinatorics Seminar: Cai Heng Li, 4pm Feb 01

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Speaker: Cai Heng Li (Southern University of Science and Technology, Shenzhen, PRC)
Title: ErdösKoRado Problem for Permutation Groups
Time and place: 4pm Friday 01 Feb 2019, Weatherburn LT
Abstract: A classical result of ErdösKoRado in extremal set theory is (...)

Tuesday 12 
16:00  SEMINAR  Groups and Combinatorics Seminar: Mariagrazia Bianchi, 4pm Feb 12

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Speaker: Mariagrazia Bianchi (Università degli Studi di Milano)
Title: Conjugacy class sizes in finite groups: variations on the theme
Time and place: 4pm Tuesday 12 Feb 2019, Weatherburn LT
Abstract: The study of conjugacy class sizes goes back to the beginning of (...)

Friday 15 
16:00  SEMINAR  Groups and Combinatorics Seminar: Gabriel Verret, 4pm Feb 15

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Speaker: Gabriel Verret (University of Auckland)
Title: An update on the Polycirculant Conjecture
Time and place: 4pm Friday 15 Feb 2019, Robert Street LT
Abstract: One version of the Polycirculant Conjecture is that every finite vertextransitive digraphs admits a (...)

Thursday 21 
16:00  SEMINAR  Mathematics and Statistics colloquium : Particle modelling applied to industrial and biophysical problems

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Particle methods have capabilities that particularly suit numerical simulation of complex phenomena involved in industrial and biophysical application domains. The two core methods used in this talk are DEM (Discrete Element Method) and SPH (Smoothed Particle Hydrodynamics). Coupling of these (...)


March 2019

Friday 08 
16:00  SEMINAR  Groups and Combinatorics Seminar: Calin Borceanu, 4pm March 08 in Weatherburn LT

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Speaker: Calin Borceanu (UWA)
Title: Searching for partial congruence partitions in groups of order p^8
Time and Place: 4pm Friday 08 Mar 2019, Weatherburn LT
Abstract: A partial congruence partition (or PCP) of a group is defined simply
as a set of pairwise (...)

Tuesday 12 
16:00  SEMINAR  Groups and Combinatorics Seminar: Sabina Pannek, 4pm March 12

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Speaker: Sabina Pannek
Title: Elements with large irreducible submodules contained in maximal subgroups of the general linear group
Time and place: 4pm Tuesday 12 Mar 2019, Blakers LT
Abstract: We refer to an element of the finite general linear group GL(V) as being (...)


April 2019

Friday 12 
16:00  SEMINAR  Groups and Combinatorics Seminar: Michael Giudici, 4pm Apr 12 in Weatherburn LT

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Speaker: Michael Giudici (University of Western Australia)
Title: Arctransitive bicirculants
Time and place: 4pm Friday 12 Apr 2019, Weatherburn LT
Abstract: A graph on 2n vertices is a bicirculant if it admits an automorphism that is a permutation with two cycles (...)

Wednesday 17 
16:00  SEMINAR  Groups and Combinatorics Seminar: Martin Liebeck, 4pm Apr 17 in Woolnough LT

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Speaker: Martin Liebeck (Imperial College London)
Title: Girth, words and diameters of Cayley graphs
Time and place: 4pm Wednesday 17 Apr 2019, Woolnough LT
Abstract: The girth of a graph is the minimal length of a cycle in the graph. Finding regular graphs with (...)


May 2019

Friday 03 
16:00  EVENT  Groups and Combinatorics Seminar: Emilio Pierro, 4pm May 3 in Weatherburn LT

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Speaker: Emilio Pierro (University of Western Australia)
Title: The 2transitive permutation representation of the small Ree groups
Time and place: 4pm Friday 03 May 2019, Weatherburn LT
Abstract: Given a group G, the question of which subsets S of G generate G is (...)

Friday 10 
16:00  SEMINAR  Groups and Combinatorics Seminar: Gordon Royle, 4pm May 10 in Weatherburn LT

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Speaker: Gordon Royle (University of Western Australia)
Title: From Lehman Matrices To (Im)Perfect Graphs
Time and place: 4pm Friday 10 May 2019, Weatherburn LT
Abstract: A pair (A,B) of square 0/1 matrices is called a Lehman pair if AB^T = J + k I where J is the (...)

Friday 17 
16:00  SEMINAR  Groups and Combinatorics Seminar: Cheryl Praeger, 4pm May 17 in Weatherburn LT

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Speaker: Cheryl E Praeger (University of Western Australia)
Title: Limited geodesic transitivity for finite regular graphs
Time and place: 4pm Friday 17 May 2019, Weatherburn LT
Abstract: Joint work with Wei Jin.
For vertex transitive graphs, transitivity (...)

Friday 24 
16:30  SEMINAR  Groups and Combinatorics Seminar: Alex Bors, 4pm May 24 in Weatherburn LT

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Speaker: Alex Bors (University of Western Australia)
Title: Words, permutations, and the nonsolvable length of a finite group
Time and place: 4pm Friday 24 May 2019, Weatherburn LT
Abstract:
In group theory, the term “word” denotes any concatenation of variables and (...)


June 2019

Thursday 20 
16:00  VISITING SPEAKER  Mathematics and Statistics Colloquium : Penalizing control volatility in nonlinear optimal control

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Abstract:
Change is necessary in any dynamic environment, but there is always a cost incurred when implementing change; one of the most obvious is wear and tear on the physical components in a system. In the optimal control field, the cost of change is almost always ignored, and this can lead to “op (...)


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