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Displaying from Thursday, September 19, 2013
 September 2013
Friday 20
15:00 - SEMINAR - Groups and Combinatorics Seminar, Generalised quadrangles constructed from groups More Information
Abstract:

This is just a survey talk of various ways to construct all of the known finite generalised quadrangles starting with a group and a configuration of subgroups of that group. In particular, the speaker will give a summary of where one of the "retreat" problems is at.
Wednesday 25
11:00 - SEMINAR - Mathematics Colloquium: The Cohen-Lenstra heuristics: from arithmetic to topology and back again More Information
Akshay Venkatesh (Stanford) Mahler Lecturer and IAS Professor-at-Large

will speak on

The Cohen-Lenstra heuristics: from arithmetic to topology and back again.

at 11am in the Science Library Access Grid room.



I will discuss some models of (...)
Friday 27
15:00 - SEMINAR - Groups and Combinatorics Seminar, Straight-line programs with memory and applications to computational group theory More Information
Abstract:

Straight-line programs offer a method for encoding group computations in a "black box" sense, namely without using specifics of the group's representation or how the group operations are performed. We advocate that straight-line programs designed for group (...)

 October 2013
Friday 11
15:00 - SEMINAR - Groups and Combinatorics Seminar, Multiply tiling Euclidean space by translating a convex object More Information
Abstract:

We study the problem of covering Euclidean space R^d by possibly overlapping translates of a convex body P, such that almost every point is covered exactly k times, for a fixed integer k. Such a covering of Euclidean space by translations is called a k-tiling. We will first (...)
Friday 18
15:00 - SEMINAR - Groups and Combinatorics Seminar, Regular orbits of Sym(n) and Alt(n) on irreducible representations More Information
Abstract:

Given a finite group G and a faithful irreducible FG-module V where F is a field of prime order, we can ask whether G has a regular orbit on the vectors of V. This problem is related to determining which primitive permutation groups of affine type have a base of size 2, as well (...)
Friday 25
15:00 - SEMINAR - Groups and Combinatorics Seminar, Coprime actions of finite linear groups More Information
Abstract:

Let H be a finite linear group acting completely reducibly on a finite vector space V. Gabriel Navarro asked: if the H-orbits containing vectors a and b have coprime lengths m and n, is there an H-orbit of length mn? We answered, by showing that the H-orbit containing a + b (...)

 November 2013
Friday 01
15:00 - SEMINAR - Groups and Combinatorics Seminar, Algebraic geometry codes More Information
Abstract:

Codes arising from algebraic geometry, first introduced by Goppa, gained attention when Tsfasman–Vladut–Zink used them to improve the Gilbert-Varshamow bound. We will give a gentle introduction to some of the beautiful ideas from algebraic geometry used to build these codes (...)
Friday 15
15:00 - SEMINAR - Groups and Combinatorics Seminar, A miscellany of topics related to semiregular graph automorphisms More Information
Abstract :

I will discuss a few things, all related to semiregular graph automorphisms : the polycirculant conjecture, the abelian normal quotient method, an interesting class of graphs...
Monday 18
13:00 - SEMINAR - Integrable-like behavior in the Fermi-Pasta-Ulam model Website | More Information
In 1950’s Fermi, motivated by fundamental questions of statistical mechanics, started a numerical experiment in collaboration with Pasta and Ulam to test the ergodic properties of nonlinear dynamical systems. The chosen so-called FPU system was a one dimensional chain of N nonlinear coupled (...)
Friday 22
11:00 - SEMINAR - Self-avoiding walks—rigorous and non-rigorous results Website | More Information
Self-avoiding walks (SAWs) are widely studied as a problem in algebraic combinatorics by mathematicians, as a problem in algorithm design by computer scientists, as a model of phase transitions by mathematical physicists and as a model of polymers in dilute solution by chemists.

More (...)

 December 2013
Monday 09
9:00 - CONFERENCE - Australasian Conference on Combinatorial Mathematics and Combinatorial Computing : Held at UWA from the 9th to 13th of December Website | More Information
This year's Australasian Conference on Combinatorial Mathematics and Combinatorial Computing will be held here at UWA from the 9th to 13th of December. Put the date in your diary now and start looking for cheap flights to Perth. Visit the conference webpage to find the exciting lineup of invited (...)

 January 2014
Friday 10
15:00 - SEMINAR - Groups and Combinatorics Seminar, Analysis and Implementation: the Two 'Editions' of a Matrix Group Algorithm More Information
Brian Corr (UWA)

will speak on

Analysis and Implementation: the Two 'Editions' of a Matrix Group Algorithm

at 3pm Friday January the 10th in Blakers Lecture Theatre.

Abstract :

The quality of an algorithm in computational mathematics is (...)
Friday 17
15:00 - SEMINAR - Groups and Combinatorics Seminar, Graphs and transitivity on 2-geodesics More Information
Alice Devillers (UWA)

will speak on

Graphs and transitivity on 2-geodesics

at 3pm Friday January the 17th in Blakers Lecture Theatre.

Abstract :

Joint work with Wei Jin, Cai Heng Li, Cheryl Praeger, Akos Seress.

An s-geodesic in (...)
Friday 24
15:00 - SEMINAR - CMSC Technical Seminar, An introduction to IPE More Information
Irene Pivotto (UWA)

will speak on

An introduction to IPE

at 3pm Friday January the 24th in Blakers Lecture Theatre.

Abstract:

IPE is a drawing editor for creating figures in PDF or EPS format, which can then be inserted into LaTeX documents (...)
Friday 31
15:00 - SEMINAR - Groups and Combinatorics Seminar, Groups and first-order logic More Information
André Nies (University of Auckland)

will speak on

Groups and first-order logic

at 3pm Friday January the 31st in Blakers Lecture Theatre.

Abstract :

We study the expressive power of first-order logic for groups. A finitely generated group (...)

 February 2014
Friday 07
15:00 - SEMINAR - Groups and Combinatorics Seminar, Row echelon matrices, flags and Grassmannians More Information
Phill Schultz (UWA)

will speak on

Row echelon matrices, flags and Grassmannians

at 3pm Friday February the 7th in Blakers Lecture Theatre.

Abstract:

There is a well trodden path from finite dimensional vector spaces to algebraic geometry (...)
Friday 21
15:00 - SEMINAR - Groups and Combinatorics Seminar, Metrically homogeneous graphs More Information
Dugald MacPherson (University of Leeds)

will speak on

Metrically homogeneous graphs

at 3pm Friday February the 21st in Blakers Lecture Theatre.

Abstract:

A `homogeneous structure' is a countably infinite relational structure M (e.g. graph (...)
Friday 28
15:00 - SEMINAR - Groups and Combinatorics Seminar, Subgroup covering numbers of symmetric groups More Information
Eric Swartz (UWA)

will speak on

Subgroup covering numbers of symmetric groups

at 3pm Friday February the 28th in Weatherburn Lecture Theatre.

Abstract:

Let G be a group. The subgroup covering number of G is defined to be the least integer m (...)

 March 2014
Friday 07
15:00 - SEMINAR - Groups and Combinatorics Seminar, Factorizations of almost simple groups with a soluble factor More Information
Binzhou Xia (Peking University)

will speak on

Factorizations of almost simple groups with a soluble factor

at 3pm Friday March the 7th in Weatherburn Lecture Theatre.

Abstract:

Factorizations of almost simple groups arise in many contexts. I (...)
Friday 14
15:00 - SEMINAR - Groups and Combinatorics Seminar, The brilliant career of Frédéric Vanhove More Information
John Bamberg (UWA)

will speak on

The brilliant career of Frédéric Vanhove

at 3pm Friday March the 14th in Weatherburn Lecture Theatre.


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