Mathematics Dept.
  Events
University of Alberta at Edmonton
Wed 1 Nov 2017, 3:00pm
Probability Seminar
ESB 2012
Feynman-Kac formula for the stochastic heat equation driven by general Gaussian noises
ESB 2012
Wed 1 Nov 2017, 3:00pm-4:00pm

Abstract


In this talk  I will  present some results on stochastic heat equations driven by a Gaussian noises. I will focus on Feynman-Kac representation of the solution and the moments of the solution. Both lower and upper bounds for the L^p moments of the solution are obtained which is relevant to the so-called intermittency. The Driving Gaussian noises include fractional Brownian fields of Hurst parameters greater or smaller than 1/2.
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Krishanu Sankar
UBC
Wed 1 Nov 2017, 3:15pm
Topology and related seminars
ESB 4133
Symmetric Powers and the Dual Steenrod Algebra - Part 2
ESB 4133
Wed 1 Nov 2017, 3:15pm-4:15am

Abstract

 

In episode 2 of the series, I will turn my attention to the setting of

$G$-equivariant stable homotopy theory, where $G$ is an abelian $p$-group.

Analogous to the classical case, we can use symmetric powers of the

equivariant sphere to filter $H\underline{\F}_p$, and the cofibers are

Steinberg summands of equivariant classifying spaces. We then study how

the cells of these spaces split after smashing with $H\underline{\F}_p$

in the case $G=C_p$. When $p=2$, the result is a decomposition of

$H\underline{\F}_2 \sm H\underline{\F}_2$ whose generators correspond to

\emph{representation spheres}, while at odd primes, we see something more unusual.

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UBC Math
Fri 3 Nov 2017, 3:00pm
Department Colloquium
ESB 2012
A Class of Polytopes with a Remarkable Volume Formula
ESB 2012
Fri 3 Nov 2017, 3:00pm-4:00pm

Abstract

TBA

Note for Attendees

Light refreshments will be served at 2:45pm in ESB 4133, the PIMS Lounge before this colloquium.
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UC Irvine
Mon 6 Nov 2017, 4:00pm
Algebraic Geometry Seminar
MATH 126
TBA
MATH 126
Mon 6 Nov 2017, 4:00pm-5:00pm

Abstract

 TBA
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Aaron Palmer
UBC
Tue 7 Nov 2017, 3:30pm
Diff. Geom, Math. Phys., PDE Seminar
ESB 2012
Optimal Stopping with a Probabilistic Constraint
ESB 2012
Tue 7 Nov 2017, 3:30pm-4:30pm

Abstract

Optimal stopping problems can be viewed as a problem to calculate
the space and time dependent value function, which solves a nonlinear, possibly
non-smooth and degenerate, parabolic PDE known as an Hamilton-Jacobi-Bellman
(HJB) equation.  These equations are well understood using the theory of
viscosity solutions, and the optimal stopping policy can be retrieved when
there is some regularity and non-degeneracy of solution.
 
The HJB equation is commonly derived from a dynamic programming principle
(DPP). After adding a probabilistic constraint, the optimal policies no longer
satisfy this DPP.  Instead, we can reach the HJB equation by a method related
to optimal transportation, and  recover a DPP for a Lagrangian-relaxation of
the problem.  The resulting HJB equation remains coupled through the constraint
with the optimal policy (and another parabolic PDE).  Solving the HJB and
recovery of the optimal stopping policy is aided by considering the
``piecewise-monotonic’' structure of the stopping set.
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Foster Tom
UBC
Tue 7 Nov 2017, 4:00pm
Discrete Math Seminar
ESB 4127
TBD
ESB 4127
Tue 7 Nov 2017, 4:00pm-5:00pm

Abstract

 
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University of California, Irvine
Wed 8 Nov 2017, 3:15pm
Topology and related seminars
ESB 4133 (PIMS Lounge)
ESB 4133 (PIMS Lounge)
Wed 8 Nov 2017, 3:15pm-4:15pm

Abstract

 

Note for Attendees


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Emory University
Thu 9 Nov 2017, 3:30pm
Number Theory Seminar
Math 126
Polya’s Program for the Riemann Hypothesis and Related Problems
Math 126
Thu 9 Nov 2017, 3:30pm-5:00pm

Abstract

In 1927 Polya  proved that the Riemann Hypothesis is equivalent to the hyperbolicity of Jensen polynomials for Riemann's Xi-function. This hyperbolicity has only been proved for degrees d=1, 2, 3. We prove the hyperbolicity of 100\% of the Jensen polynomials of every degree. We obtain a general theorem which models such polynomials by Hermite polynomials.
This theorem also allows us to prove a conjecture of Chen, Jia, and Wang on the partition function. This is joint work with Michael Griffin, Larry Rolen, and Don Zagier.
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Oregon
Mon 13 Nov 2017, 4:00pm
Algebraic Geometry Seminar
MATH 126
TBA
MATH 126
Mon 13 Nov 2017, 4:00pm-5:00pm

Abstract

 TBA
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Wayne State University
Wed 15 Nov 2017, 3:15pm
Topology and related seminars
ESB 4133
ESB 4133
Wed 15 Nov 2017, 3:15pm-4:15pm

Abstract

 
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Université de Montréal
Fri 17 Nov 2017, 11:00am
Number Theory Seminar
MATX1118 (tentative)
TBA
MATX1118 (tentative)
Fri 17 Nov 2017, 11:00am-12:00pm

Abstract


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Yaniv Plan
UBC
Fri 17 Nov 2017, 3:00pm SPECIAL
ESB 2012
PIMS-UBC Distinguished Colloquium--TBA (for PIMS UBC Math Sciences prize)
ESB 2012
Fri 17 Nov 2017, 3:00pm-4:00pm

Details

 

Note for Attendees

Light refreshments will be served at 2:45pm in ESB 4133, the PIMS Lounge before this colloquium.
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Idaho
Mon 20 Nov 2017, 4:00pm
Algebraic Geometry Seminar
MATH 126
TBA
MATH 126
Mon 20 Nov 2017, 4:00pm-5:00pm

Abstract

 TBA
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Michal Kowalczyk
University of Chile
Tue 21 Nov 2017, 3:30pm
Diff. Geom, Math. Phys., PDE Seminar
ESB 2012
Asymptotic stability for some nonlinear Klein-Gordon equations for odd perturbations in the energy space
ESB 2012
Tue 21 Nov 2017, 3:30pm-4:30pm

Abstract

 Showing asymptotic stability in one dimensional nonlinear Klein-Gordon equations is a notoriously difficult problem. In this talk I will describe an approach based on virial estimates which allows to prove it in case when only odd perturbations are allowed. In particular I will discuss asymptotic stability of the kink in the $\phi^4$ model.       
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University of Southern California
Wed 22 Nov 2017, 3:15pm
Topology and related seminars
ESB 4133
ESB 4133
Wed 22 Nov 2017, 3:15pm-4:15pm

Abstract

 
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Texas A&M
Thu 23 Nov 2017, 4:00pm SPECIAL
Algebraic Geometry Seminar
MATX 1101
TBA
MATX 1101
Thu 23 Nov 2017, 4:00pm-5:00pm

Abstract

 TBA
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Université Paris-Saclay
Wed 29 Nov 2017, 3:15pm SPECIAL
Department Colloquium
ESB 2012
TBA
ESB 2012
Wed 29 Nov 2017, 3:15pm-4:15am

Abstract


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Columbia
Wed 29 Nov 2017, 4:00pm
Algebraic Geometry Seminar
MATH 126
TBA
MATH 126
Wed 29 Nov 2017, 4:00pm-5:00pm

Abstract

 TBA
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