CARMA Workshop

GAGTA8

9:00 am

Monday, 21st Jul 2014

Fort Scratchley [Newcastle, NSW]

The eighth edition of the conference series GAGTA (Geometric and Asymptotic Group Theory with Applications) will be held in Newcastle, Australia July 21-25 (Mon-Fri) 2014.

GAGTA conferences are devoted to the study of a variety of areas in geometric and combinatorial group theory, including asymptotic and probabilistic methods, as well as algorithmic and computational topics involving groups. In particular, areas of interest include group actions, isoperimetric functions, growth, asymptotic invariants, random walks, algebraic geometry over groups, algorithmic problems and their complexity, generic properties and generic complexity, and applications to non-commutative cryptography.

Visit the conference web sitefor more information.

[Permanent link]



ICERM Workshop

Challenges in 21st Century Experimental Mathematical Computation

9:00 am

Monday, 21st Jul 2014

[Brown University]

[Permanent link]



School Meeting

10:00 am

Wednesday, 30th Jul 2014

Location to be announced

[Permanent link]



Vice Chancellor's Visit

1:30 pm

Friday, 1st Aug 2014

V103,Mathematics Building

[Permanent link]



CARMA Colloquium

4:00 pm

Thursday, 7th Aug 2014

V205, Mathematics Building

Dr Mike Meylan

(CARMA, The University of Newcastle)

TBA



CARMA Colloquium

4:00 pm

Thursday, 14th Aug 2014

V206, Mathematics Building

Volker Diekert

(University of Stuttgart)

Conjugacy in Baumslag's group, generic case complexity, and division in power circuits

In my talk I will report on a recent joint work with Alexei Myasnikov and Armin Weiss which was presented at the conference LATIN 2014 in Montevideo. The motivation stems from algorithmic group theory. It concerns the conjugacy problem for two prominent groups: the Baumslag-Solitar group BS(1,2) and the Baumslag's group BG(1,2). The groups are quite different although the second one, B(1,2) is still a one-relator group and obtained by a single HNN extension of the Baumslag-Solitar group BS(1,2) The word problem and the conjugacy problem in the Baumslag-Solitar group is easy, but this does not transfer to BG(1,2).

Our main result shows that conjugacy in BG(1,2) can be solved in polynomial time in a strongly generic setting. The result is surprising because our algorithm has non-elementary average case complexity; and we conjecture that this is the best we can expect. This is interesting in a broader sense since it relates a natural conjugacy problem in algorithmic group theory to integer division in power circuits. A power circuit is a data structure which allows to represent huge numbers involving tower functions by small graphs. Actually, the complexity of the division problem in power circuits is an open and interesting problem in arithmetic.

[Permanent link]



CARMA Retreat

9:00 am

Saturday, 30th Aug 2014

Fort Scratchley [Newcastle, NSW]

[Permanent link]



AMSI Event

EViMS 2: Effective use of Visualisation in the Mathematical Sciences

9:00 am

Friday, 21st Nov 2014

[Australian National University]

The Mathematical Sciences Institute will host a three day workshop on more effective use of visualization in mathematics, physics, and statistics, from the perspectives of education, research and outreach. This is the second EViMS meeting, following the highly successful one held in Newcastle in November 2012. Our aim for the workshop is to help mathematical scientists understand the opportunities, risks and benefits of visualization, in research and education, in a world where visual content and new methods are becoming ubiquitous.

Visit the conference website for more information.

[Permanent link]



External Event

2014 ANZAMP annual meeting

9:00 am

Monday, 8th Dec 2014

[The University of Melbourne]

The annual meeting of the Australian and New Zealand Association of Mathematical Physics will be incorporated into the 8th Australia New Zealand Mathematics Convention at the University of Melbourne. For details, please visit the convention website.

[Permanent link]



AMSI Event

AMSI Summer School in the Mathematical Sciences

9:00 am

Saturday, 3rd Jan 2015


Details will be available later.

[Permanent link]



External Event

Spring School on Variational Analysis VI

9:00 am

Sunday, 19th Apr 2015

[Paseky nad Jizerou]

Ffollowing a longstanding tradition, the Faculty of Mathematics and Physics of Charles University in Prague and the Academy of Sciences of the Czech Republic will organize the Spring School on Variational Analysis VI. The School will be held in Paseky nad Jizerou, in a chalet in the Krkonose Mountains, April 19 - 25, 2015. The program will consist of series of lectures on Variational Analysis and its Applications.

The lectures will be given by

  • Jonathan M. Borwein (The University of Newcastle, Australia)
    Theory and Applications of Convex and Non-convex Feasibility Problems
  • Marian Fabian (Academy of Sciences of the Czech Republic)
    Separable Reductions and Rich Families in Theory of Frechet Subdifferentials
  • Alexander Ioffe (Technion, Haifa, Israel)
    Variational Analysis and Optimization Theory
  • David Russel Luke (Georg-August-Universitaet Goettingen, Germany)
    Variational Methods in Numerical Analysis

Further informations can be found on the website http://www.karlin.mff.cuni.cz/katedry/kma/ss/apr15.

[Permanent link]