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 Events
Mon 2 May 2011, 8:00am SPECIAL
One Time Event
UBC
Young Researchers Conference
UBC
Mon 2 May 2011, 8:00am-9:00pm

Details

 

In May 2011, UBC will be hosting the 8th annual PIMS Young Researchers

Conference (YRC).  This meeting is specifically designed for graduate

students, and offers an excellent opportunity to learn about graduate

level math and stats research at PIMS Universities.  At the YRC you can

give a 20 minute talk, attend a workshop, enjoy the plenary speakers or

simply meet and discuss your research with other grads over a coffee or

at the banquet.  It is an excellent opportunity to network, explore

your interests, practice giving a professional talk, and meet some

great people.

 

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Tue 3 May 2011, 8:00am SPECIAL
One Time Event
UBC
Young Researchers Conference
UBC
Tue 3 May 2011, 8:00am-10:00pm

Details

In May 2011, UBC will be hosting the 8th annual PIMS Young Researchers

 

Conference (YRC). This meeting is specifically designed for graduate

students, and offers an excellent opportunity to learn about graduate

level math and stats research at PIMS Universities.  At the YRC you can

give a 20 minute talk, attend a workshop, enjoy the plenary speakers or

simply meet and discuss your research with other grads over a coffee or

at the banquet.  It is an excellent opportunity to network, explore

your interests, practice giving a professional talk, and meet some

great people.

 

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Beth Kochin
Tue 3 May 2011, 2:00pm
Mathematical Biology Seminar
WMAX 110 (PIMS downstairs)
Control of Acute Infections
WMAX 110 (PIMS downstairs)
Tue 3 May 2011, 2:00pm-3:00pm
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UBC
Tue 3 May 2011, 3:15pm
Stochastic Dynamics Working Group
IAM Lounge (LSK 306)
Branching processes in a cell model for treated HIV patients
IAM Lounge (LSK 306)
Tue 3 May 2011, 3:15pm-4:15pm

Abstract


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Wed 4 May 2011, 8:00am SPECIAL
One Time Event
UBC
Young Researchers Conference
UBC
Wed 4 May 2011, 8:00am-10:00pm

Details

In May 2011, UBC will be hosting the 8th annual PIMS Young Researchers

 

Conference (YRC). This meeting is specifically designed for graduate

students, and offers an excellent opportunity to learn about graduate

level math and stats research at PIMS Universities.  At the YRC you can

give a 20 minute talk, attend a workshop, enjoy the plenary speakers or

simply meet and discuss your research with other grads over a coffee or

at the banquet.  It is an excellent opportunity to network, explore

your interests, practice giving a professional talk, and meet some

great people.

 

hide
Thu 5 May 2011, 8:00am SPECIAL
One Time Event
UBC
Young Researchers Conference
UBC
Thu 5 May 2011, 8:00am-10:00pm

Details

In May 2011, UBC will be hosting the 8th annual PIMS Young Researchers

 

Conference (YRC). This meeting is specifically designed for graduate

students, and offers an excellent opportunity to learn about graduate

level math and stats research at PIMS Universities.  At the YRC you can

give a 20 minute talk, attend a workshop, enjoy the plenary speakers or

simply meet and discuss your research with other grads over a coffee or

at the banquet. It is an excellent opportunity to network, explore

your interests, practice giving a professional talk, and meet some

great people.

hide
CNRS and University of Strasbourg
Tue 10 May 2011, 4:00pm
Topology and related seminars
WMAX 110
A continuous non-abelian one-cocycle with palindromic values
WMAX 110
Tue 10 May 2011, 4:00pm-5:00pm

Abstract

Using a group of automorphisms of the free group F_2 isomorphic to the braid group B_3, we construct a non-abelian one-cocycle P: F_2 --> F_2, which turns out to take palindromic values and to be continuous for the profinite topology on F_2. We  characterize the elements of the image of the map P and use B_3 to express the relation between elements having the same image. (Joint work with Christophe Reutenauer, UQAM.)
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Yao-ban Chan
University of Bordeaux
Tue 10 May 2011, 4:00pm
Discrete Math Seminar
Math 126
Series expansions from the corner transfer matrix renormalization group method
Math 126
Tue 10 May 2011, 4:00pm-5:00pm

Abstract

The corner transfer matrix renormalization group method is a powerful
algorithm for evaluating physical quantities in statistical mechanical
models. It was developed by Nishino and Okunishi in 1996, and
originates from Baxter's corner transfer matrix equations and method,
which were developed in 1978. The method has been applied to numerous
models since its development to great success, but has not been used
to calculate series expansions (which Baxter did with his original
method).

In this talk, we discuss the CTMRG method, our work on this method
which has enabled us to calculate series expansions from it, and the
models we have applied it to.

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Hardeep Gill
Fri 13 May 2011, 9:00am SPECIAL
One Time Event
Graduate Student Center, Room 200
Doctoral Exam
Graduate Student Center, Room 200
Fri 13 May 2011, 9:00am-11:30am

Details

Abstract:  
The focus of this presentation is a class of random processes known as
interacting measure-valued stochastic processes.   These processes are
related to another class of measure-valued stochastic processes known as
superprocesses. Both superprocesses and interacting measure-valued
stochastic processes arise naturally from branching particle systems as
scaling limits.  A branching particle system is a collection of particles
that propagate randomly through space, and that upon death give birth to a
random number of particles (children).  Therefore when the populations of
the particle system and branching rate are large one can often use a
superprocess to approximate  it and carry out calculations that would be
very difficult otherwise.

There are many branching particle systems which do not satisfy the strong
independence assumptions underlying superprocesses and thus are more
difficult to study mathematically.  We attempt to address two
measure-valued processes with different types of dependencies
(interactions) that the associated particles exhibit.  In both cases, the
method used to carry out this work is called Perkins' historical stochastic
calculus, and has never before been used to investigate interacting
measure-valued processes of these types.  That is, we construct the
measure-valued stochastic process associated with an interacting branching
particle system directly without taking a scaling limit.

The first type of interaction we consider is when all particles share a
common chaotic drift from being immersed in the same medium, as well as
having other types of individual interactions.  The second interaction
involves particles that attract to or repel from the center of mass of the
entire population.  For measure-valued processes with this latter
interaction, we  study the long-term behavior of the process and show that
it displays some types of equilibria.


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Alexander Duncan
Fri 13 May 2011, 4:00pm SPECIAL
One Time Event
Graduate Student Center, Room 203
Doctoral Exam
Graduate Student Center, Room 203
Fri 13 May 2011, 4:00pm-6:30pm

Details


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TAU
Fri 27 May 2011, 1:00pm
Probability Seminar
MATX 1102 (Note time and location change)
Proper colorings, Lipschitz functions and cutsets in high dimensions
MATX 1102 (Note time and location change)
Fri 27 May 2011, 1:00pm-2:00pm

Abstract

We consider a uniformly chosen proper 3-coloring of the discrete torus Z_n^d. We show that in sufficiently high dimensions, such a coloring is very rigid, taking a single color on most of either the even or odd sublattice. We will further explain the relation between proper 3-colorings and a certain class of Lipschitz functions, and how it implies that high-dimensional Lipschitz functions are typically flat. Our main tool is a detailed study of the combinatorics of certain cutsets in Z^d. Along the way, we will mention many related conjectures and open questions concerning proper colorings and random functions.
All concepts used will be introduced and the talk will be illustrated by many pictures.

Part of this work is joint with Ohad N. Feldheim.
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Mon 30 May 2011, 12:00pm SPECIAL
One Time Event
Math 125
Graduation Reception
Math 125
Mon 30 May 2011, 12:00pm-1:30pm

Details

Awards will be presented and refreshments will be served.  This is followed by the Niven Lecture.
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Ravi Vakil
Stanford University
Mon 30 May 2011, 1:30pm SPECIAL
One Time Event
Geography 100
Niven Lecture - The Mathematics of Doodling
Geography 100
Mon 30 May 2011, 1:30pm-2:30pm

Details

Doodling has many mathematical aspects: patterns, shapes,  numbers, and more.  Not surprisingly, there is often some sophisticated and fun mathematics buried inside common doodles.  I'll begin by doodling, and see where it takes us.  It looks like play, but it reflects what mathematics is really about:  finding patterns in nature, explaining them, and extending them.  By the end, we'll have seen some important notions in geometry, topology, physics, and elsewhere; some fundamental ideas guiding the development of mathematics over the course of the last century;  and ongoing work continuing today.
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