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Displaying from Sunday, September 16, 2012
 October 2012
Tuesday 02
13:00 - SEMINAR - Groups and Combinatorics: Packing Steiner trees More Information
Groups and Combinatorics Seminar

Irene Pivotto (UWA)

will speak on

Packing Steiner trees

at 1pm Tuesday 2nd of October in MLR2

Abstract: A classic theorem of Nash-Wiliams and Tutte gives necessary and sufficient conditions for a graph to have k (...)
Monday 08
13:10 - SEMINAR - Groups and Combinatorics Seminar: Commuting graphs of groups More Information
Groups and Combinatorics Seminar

Michael Giudici (UWA)

will speak on

Commuting graphs of groups

at 1pm Tuesday 9th of October in MLR2

Abstract: The commuting graph of a group G is the graph whose vertices are the noncentral elements of G and (...)
Monday 15
18:00 - PUBLIC LECTURE - The solution of the Poincare conjecture Website | More Information
A Public Lecture by Professor J. Hyam Rubinstein, Department of Mathematics & Statistics, University of Melbourne.

The Poincare conjecture was one of the most celebrated questions in mathematics. It was amongst the seven millennium problems of the Clay Institute, for which a prize of (...)
Tuesday 16
13:00 - SEMINAR - Groups and Combinatorics: Finite meta-primitive permutation groups More Information
Groups and Combinatorics Seminar

Cai Heng Li (UWA)

will speak on

Finite meta-primitive permutation groups

at 1pm Tuesday 16th of October in MLR2

Abstract: A transitive permutation group is called meta-primitive if its any imprimitive (...)
Tuesday 23
13:00 - SEMINAR - Groups and Combinatorics Seminar: Clifford theory and Hecke algebras More Information
Groups and Combinatorics Seminar

Arun Ram (University of Melbourne)

will speak on

Clifford theory and Hecke algebras

at 1pm on Tuesday the 23rd of October in MLR2

Abstract: The usual Clifford theory describes the irreducible representations (...)

 November 2012
Tuesday 20
13:00 - SEMINAR - Groups and Combinatorics Seminar: Finite s-Geodesic Transitive Graphs More Information
Groups and Combinatorics Seminar

Wei Jin (UWA)

will speak on

Finite s-Geodesic Transitive Graphs

at 1pm on Tuesday 20th of November in Maths Lecture Room 2

Abstract: A geodesic from a vertex u to a vertex v in a graph is one of the shortest (...)
Tuesday 27
13:00 - SEMINAR - Groups and Combinatorics Seminar: Graphs and general preservers of zero products More Information
Groups and Combinatorics Seminar

Bojan Kuzma (University of Primorska, Slovenia)

will speak on

Graphs and general preservers of zero products

at 1pm on Tuesday 27th of November in MLR2

Abstract: We survey some results in preserver problems (...)

 December 2012
Tuesday 04
13:00 - SEMINAR - Groups and Combinatorics Seminars More Information
Groups and Combinatorics Seminar

Neil Gillespie (UWA)

will speak on

Completely regular codes with large minimum distance

and

Daniel Hawtin (UWA) will speak on Elusive Codes in Hamming Graphs

at 1pm Tuesday 4th of December in MLR2

 February 2013
Friday 22
15:00 - SEMINAR - Groups and Combinatorics Seminar: Algebraic aspects of Hadamard matrices More Information
Our Groups and Combinatorics Seminar will resume this Friday.

Padraig Ó Catháin (The University of Queensland)

will speak on

Algebraic aspects of Hadamard matrices

at 3pm Friday 22nd of February in MLR2.

Abstract:

Hadamard matrices (...)

 March 2013
Friday 01
15:00 - SEMINAR - Groups and Combinatorics Seminar, The Wall and Guralnick conjectures: history and legacy More Information
Abstract:

In 1961 G.E. Wall conjectured that the number of maximal subgroups of a finite group is less than the order of the group. The conjecture holds for all finite solvable groups (proved by Wall himself in his original paper) and holds for almost all finite simple groups, possibly (...)
Tuesday 05
13:00 - SEMINAR - Groups and Combinatorics Seminar, Control of fusions in fusion systems and applications More Information
Jiping Zhang (Peking University)

will speak on

Control of fusions in fusion systems and applications

at 1pm on Tuesday 5th of March, in MLR2

Abstract:

Fusion systems were introduced by L. Puig in early 1990's mainly for the purpose of block (...)
Friday 08
15:00 - SEMINAR - Groups and Combinatorics Seminar, Generalised n-gons and the Feit-Higman theorem More Information
Name: Jon Xu (University of Melbourne/University of Western Australia)

will speak on

Generalised n-gons and the Feit-Higman theorem

at 3pm on Friday 8th of March.

Abstract:

Jacques Tits' theory of buildings played a vital role in the proof of (...)
Friday 15
15:00 - SEMINAR - Groups and Combinatorics Seminar, Erdös-Ko-Rado sets in finite classical polar spaces More Information
Abstract:

Erdös-Ko-Rado sets (EKR sets) are a family of k-sets of { 1, ..., n } that pairwise intersect in at least one element and were first studied by Erdös, Ko, and Rado in 1961. There are several generalizations of EKR sets. The speaker's main interest is study of EKR sets in polar (...)
Friday 22
15:00 - SEMINAR - Groups and Combinatorics Seminar, Irreducible subgroups of classical algebraic groups More Information
Abstract:

Let G be a group, let H be a subgroup of G and let V be an irreducible KG-module over a field K. We say that (G,H,V) is an irreducible triple if V is an irreducible KH-module. Classifying the irreducible triples of a group is a fundamental problem in representation theory, with (...)
Thursday 28
14:00 - SEMINAR - Groups and Combinatorics Seminar: Bacterial genome evolution with algebra More Information
Andrew Francis (University of Western Sydney)

will speak on

Bacterial genome evolution with algebra

at 2pm Thursday 28th of March in Blakers Lecture Theatre

NOTE CHANGE OF DAY, TIME AND VENUE

Abstract:

The genome of a bacterial (...)

 April 2013
Friday 05
15:00 - SEMINAR - Groups and Combinatorics Seminar, Redei-polynomials in finite geometry More Information
Abstract:

L. Redei has studied in a detailed way so-called "lacunary" polynomials over finite fields. One of the applications described is to investigate the number of values the difference quotient of a polynomial over a finite field can have. This result has a direct (...)
Tuesday 09
13:00 - SEMINAR - Groups and Combinatorics Seminar, The Erdos-Stone Theorem for finite geometries More Information
Abstract:

For any class of graphs, the growth function h(n) of the class is defined to be the maximum number of edges in a graph in the class on n vertices. The Erdos-Stone Theorem remarkably states that, for any class of graphs that is closed under taking subgraphs, the asymptotic (...)
Friday 12
15:00 - SEMINAR - Groups and Combinatorics Seminar, On the number of matroids More Information
Abstract:

Matroids are combinatorial structures that generalize graphs as well as configurations of points in projective space. They consist of a finite ground set E and a set of subsets of E called B, such that B satisfies certain axioms. We consider the problem of bounding the number (...)
Friday 19
15:00 - SEMINAR - Groups and Combinatorics Seminar, Arc-transitive graphs with large automorphism groups More Information
Abstract:

An arc in a graph is an unordered pair of adjacent vertices. A graph is called arc-transitive if its automorphism group acts transitively on its set of arcs. We consider the problem of bounding the size of the automorphism group of an arc-transitive graph in terms of its order (...)
Friday 26
15:00 - SEMINAR - Groups and Combinatorics Seminar, Locally s-arc transitive regular covers of complete bipartite graphs More Information
Abstract:

The normal quotient method has made the study of certain families of finite graphs (for instance, s-arc transitive and locally s-arc transitive graphs) more approachable by dividing the problem into two parts: (I) Study the "basic graphs," those graphs in the family (...)


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