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 Events
Mon 26 Jan 2015, 1:00pm
Math Education Research Reading
MATX1118
"Student learning and perceptions in a flipped linear algebra course" by Betty Love, Angie Hodgea, Neal Grandgenettb & Andrew W. Swifta
MATX1118
Mon 26 Jan 2015, 1:00pm-2:00pm

Abstract


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DWAVE
Mon 26 Jan 2015, 3:00pm
Institute of Applied Mathematics
LSK 460
Quantum computation: from DWAVE to sheaves
LSK 460
Mon 26 Jan 2015, 3:00pm-4:00pm

Abstract

I start with DWAVE, a successful BC company building and selling quantum computers. I go through the math, the chip and the controversies. I explain how one can program DWAVE machines and solve NP hard problems. I then talk about measurement based quantum computation (MBQC, also a BC product), lots of math, no controversies but no machines. I explain how it relates to Einstein–Podolsky–Rosen paradox and topos theory.

Note for Attendees

 Tea and cookies beforehand in the IAM lounge, LSK 306
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Stanford University
Mon 26 Jan 2015, 3:00pm
CRG Geometry and Physics Seminar
ESB 4127
Picard Groups of K3 Moduli Spaces
ESB 4127
Mon 26 Jan 2015, 3:00pm-4:00pm

Abstract

  Polarized K3 surfaces of genus g can be thought of as families of canonical curves.  As such, their moduli space K_g has similar properties to M_g.  For instance, both are unirational for low values of g, and both have discrete Picard group.  In this talk, we will use the explicit unirationality of K_g to compute its Picard number in a few cases, which verifies the Noether-Lefschetz conjecture for genus up to 10.
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UBC
Mon 26 Jan 2015, 4:00pm
Department Colloquium
LSK 200
Azumaya Algebras and Obstruction Theory
LSK 200
Mon 26 Jan 2015, 4:00pm-5:00pm

Abstract

Azumaya Algebras are a generalization of central simple algebras over fields, and have been studied since the 1950s. In this talk, I shall explain how topological obstruction theory for PGLn bundles can be used to answer questions about Azumaya Algebras over rings.

Note for Attendees

Refreshments will be served at 3:40pm in the Math Lounge area, MATH 125 before the colloquium.
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Oxford Mathematical Institute
Thu 29 Jan 2015, 12:30pm
Department Colloquium
MATX 1100
Stable and Consistent Algorithms for Numerical Computation on Curved Surfaces
MATX 1100
Thu 29 Jan 2015, 12:30pm-2:00pm

Abstract

The Closest Point Method is a set of mathematical principles and associated numerical techniques for solving partial differential equations (PDEs) posed on curved surfaces or other general domains. The method works by embedding the surface in a higher-dimensional space and solving the PDE in that space using simple finite difference and interpolation schemes.

This presentation outlines how a chance encounter with instability improved our understanding of the method and is leading to new formulations with proven convergence properties.

We will also briefly survey some applications in thin-film flows, reaction-diffusion equations, bulk-surface coupling, point clouds, and image processing.

Note for Attendees

 Sushi will be served at the talk. 
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U. of Pennsylvania
Thu 29 Jan 2015, 3:30pm
Probability Seminar
MATH 104
Harnack inequalities for degenerate diffusions
MATH 104
Thu 29 Jan 2015, 3:30pm-5:00pm

Abstract


Abstract: We will present probabilistic and analytic properties of a class of degenerate diffusion operators arising in population genetics, the so-called generalized Kimura diffusion operators. Such processes arise as models for the evolution of gene frequencies. We will start by highlighting the main questions of interest and the mathematical difficulties in addressing them. Our main results are a stochastic representation of weak solutions to a degenerate parabolic equation with singular lower-order coefficients, and the proof of the scale-invariant Harnack inequality for nonnegative solutions to the Kimura parabolic equation. The stochastic representation of solutions that we establish is a considerable generalization of the classical results on Feynman-Kac formulas concerning the assumptions on the degeneracy of the diffusion matrix, the boundedness of the drift coefficients, and on the a priori regularity of the weak solutions.

This is joint work with Charles Epstein.
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SFU
Thu 29 Jan 2015, 3:30pm
Number Theory Seminar
room ASB 10940 (SFU - IRMACS)
Genus 2 curves with (3, 3)-isogenies and 3-torsion in Sha
room ASB 10940 (SFU - IRMACS)
Thu 29 Jan 2015, 3:30pm-4:30pm

Abstract

We parametrize genus 2 curves with a maximal isotropic (Z/3)2 in their Jacobian, together with an explicit description of the associated isogeny. This allows us to perform (3, 3)-isogeny descent on various simple principally polarized abelian surfaces and exhibit non-trivial 3-part in their Tate-Shafarevich groups. This is joint work with Victor Flynn and Damiano Testa.
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University of Pennsylvania
Fri 30 Jan 2015, 3:00pm
Department Colloquium
LSK 200
The fractional Laplacian operator and its gradient perturbations
LSK 200
Fri 30 Jan 2015, 3:00pm-4:00pm

Abstract

The fractional Laplacian operator plays the same paradigmatic role in the theory of nonlocal operators that the Laplacian plays in the theory of local operators. We will present regularity results for solutions to problems defined by the fractional Laplacian operator with gradient perturbations. Our main results are the regularity of solutions in Sobolev spaces to the linear equation in the supercritical regime, when the operator is not elliptic, and the optimal regularity of solutions to the stationary obstacle problem in the supercritical regime.

This is joint work with Charles Epstein and Arshak Petrosyan.

Note for Attendees

Refreshments will be served at 2:40pm in the Math Lounge area, MATH 125 before the colloquium.
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Los Alamos Lab
Mon 2 Feb 2015, 2:00pm SPECIAL
Institute of Applied Mathematics
LSK 460
Developing open-source tools for environmental applications
LSK 460
Mon 2 Feb 2015, 2:00pm-10:00am

Abstract

 

Note for Attendees

 This is the annual IAM alumni lecture. 
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IBM TJ Watson Research Center
Mon 2 Feb 2015, 4:00pm
Department Colloquium
LSK 200
TBA
LSK 200
Mon 2 Feb 2015, 4:00pm-5:00pm

Abstract

Refreshments will be served at 3:40pm in the Math Lounge area, MATH 125 before the colloquium.
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NYU
Tue 3 Feb 2015, 4:00pm
Department Colloquium
MATH 100
TBA
MATH 100
Tue 3 Feb 2015, 4:00pm-5:00pm

Abstract


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UT Austin
Thu 5 Feb 2015, 12:30pm
Department Colloquium
MATX 1100
Applications and Numerical Methods for Optimal Transportation
MATX 1100
Thu 5 Feb 2015, 12:30pm-1:30pm

Abstract

The problem of optimal transportation, which involves finding the most cost-efficient mapping between two measures, arises in many different applications. However, the numerical solution of this problem remains extremely challenging. After surveying several current applications, we describe a numerical method for the widely-studied case when the cost is quadratic. The solution is obtained by solving the Monge-Ampere equation, a fully nonlinear elliptic partial differential equation (PDE), coupled to anon-standard implicit boundary condition. Expressing this problem in terms of weak (viscosity) solutions enables us to construct a monotone finite difference approximation that provably converges to the correct solution. A range of challenging computational examples demonstrate the effectiveness of this method.
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TBA
Thu 5 Feb 2015, 3:30pm
Number Theory Seminar
room MATH 126
room MATH 126
Thu 5 Feb 2015, 3:30pm-4:30pm

Abstract

 
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Los Alamos National Laboratory
Thu 5 Feb 2015, 4:00pm
Department Colloquium
ESB 2012 (PIMS) Note the date and location change
TBA
ESB 2012 (PIMS) Note the date and location change
Thu 5 Feb 2015, 4:00pm-5:00pm

Abstract


Note for Attendees

Refreshments will be served at 2:40pm in the Math Lounge area, MATH 125 before the colloquium.
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McGill University
Wed 11 Feb 2015, 3:00pm
Department Colloquium
ESB 2012
TBA
ESB 2012
Wed 11 Feb 2015, 3:00pm-4:00pm

Abstract


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TBA
Thu 12 Feb 2015, 3:30pm
Number Theory Seminar
room MATH 126
room MATH 126
Thu 12 Feb 2015, 3:30pm-4:30pm

Abstract

 
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Anthony Wachs
IFP Energies nouvelles
Thu 12 Feb 2015, 4:00pm
Department Colloquium
ESB 2012
TBA
ESB 2012
Thu 12 Feb 2015, 4:00pm-5:00pm

Abstract


Note for Attendees

Refreshments will be served at 2:40pm in the Math Lounge area, MATH 125 before the colloquium.
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Stanford U. and UC Irvine
Mon 16 Feb 2015, 3:30pm
Department Colloquium
ESB 2012 (PIMS) (Tentative)
TBA Special PIMS colloquium
ESB 2012 (PIMS) (Tentative)
Mon 16 Feb 2015, 3:30pm-4:30pm

Abstract


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Bioengineering and Chemical and Biomolecular Engineering, University of Pennsylvania
Mon 23 Feb 2015, 3:00pm SPECIAL
Institute of Applied Mathematics
LSK 460
Developing open-source tools for environmental applications
LSK 460
Mon 23 Feb 2015, 3:00pm-4:00pm

Abstract

Adhesive Dynamics is a method to simulate the dynamics of cell adhesion to surfaces. Adhesion receptors are modeled as reactive mechanical entities with adhesive tips, and the formation and breakage of adhesion molecules with cognate ligands is simulated using random number sampling. Once the bonds form, the contact points they make with surfaces are tracked, and a force balance is used to calculate the motion of the cell. Specific rheological laws relate stress (or strain) to bond failure rates, and the parameters of these laws dictate the quantitative sensitivity of adhesion molecules to force, and ultimately affect the dynamics of cell adhesion as a whole. We summarize major findings of cell adhesion that have been enabled by Adhesive Dynamics - the development of state diagrams of adhesion, that link distinct states of adhesion to molecular identity, such as leukocyte rolling; specification of what is required for firm arrest of a leukocyte; a description of the shear threshold effect in which adhesion increases with shear rate; and understanding how two molecules can act in synergy to secure adhesion that cannot be secured by either molecule alone. Finally, we show how signal transduction networks can be integrated within adhesive dynamics to understand how cell activation can lead to changes in adhesion and arrest, and use predictions to understand how cells might behave when molecular components are altered or eliminated in knock-out mice, or in various diseases due to molecular defects.
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Northwestern University
Mon 23 Feb 2015, 4:00pm
Department Colloquium
LSK 200
TBA
LSK 200
Mon 23 Feb 2015, 4:00pm-5:00pm

Abstract


Note for Attendees

Refreshments will be served at 3:40pm in the Math Lounge area, MATH 125 before the colloquium.
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Université Claude Bernard, Lyon
Tue 24 Feb 2015, 2:00pm
CRG Geometry and Physics Seminar
ESB 4127
Serre's conjecture II : beyond the de Jong-He-Starr's theorem
ESB 4127
Tue 24 Feb 2015, 2:00pm-3:00pm

Abstract

 
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TBA
Thu 26 Feb 2015, 3:30pm
Number Theory Seminar
room MATH 126
room MATH 126
Thu 26 Feb 2015, 3:30pm-4:30pm

Abstract

 
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Caltech
Fri 27 Feb 2015, 3:00pm
Department Colloquium
ESB 2012 (PIMS)
PIMS-UBC distinguished colloquium
ESB 2012 (PIMS)
Fri 27 Feb 2015, 3:00pm-4:00pm

Abstract


Note for Attendees

Coffee, tea and cookies served at 2:30pm in the PIMS Lounge, ESB 4133.
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UBC
Mon 2 Mar 2015, 4:00pm
Discrete Math Seminar
TBA
TBA
TBA
Mon 2 Mar 2015, 4:00pm-5:00pm

Abstract


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Stanford University
Tue 3 Mar 2015, 3:30pm
Diff. Geom, Math. Phys., PDE Seminar
ESB 2012
TBA
ESB 2012
Tue 3 Mar 2015, 3:30pm-4:30pm

Abstract

 
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UCLA
Thu 5 Mar 2015, 3:30pm
Number Theory Seminar
room MATH 126
TBA
room MATH 126
Thu 5 Mar 2015, 3:30pm-4:30pm

Abstract

 
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UCLA
Fri 6 Mar 2015, 3:00pm
Department Colloquium
LSK 200 (Note the special location)
TBA
LSK 200 (Note the special location)
Fri 6 Mar 2015, 3:00pm-4:00pm

Abstract


Note for Attendees

Refreshments will be served at 2:40pm in the Math Lounge area, MATH 125 before the colloquium.
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Colorado State University
Tue 10 Mar 2015, 4:00pm
Discrete Math Seminar
TBA
TBA
TBA
Tue 10 Mar 2015, 4:00pm-5:00pm

Abstract


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Subhajit Jana
UBC
Thu 12 Mar 2015, 3:30pm
Number Theory Seminar
room MATH 126
TBA
room MATH 126
Thu 12 Mar 2015, 3:30pm-4:30pm

Abstract

 
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Brown University
Fri 13 Mar 2015, 3:00pm
Department Colloquium
ESB 2012 (PIMS)
The mathematics of lattice-based cryptography (PIMS-UBC Distinguished Colloquium)
ESB 2012 (PIMS)
Fri 13 Mar 2015, 3:00pm-4:00pm

Abstract


Note for Attendees

Coffee, tea and cookies served at 2:30pm in the PIMS Lounge, ESB 4133.
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Imperial College
Mon 16 Mar 2015, 3:10pm
CRG Geometry and Physics Seminar
ESB4127
Mirror Symmetry and the Classification of Fano Manifolds
ESB4127
Mon 16 Mar 2015, 3:10pm-4:10pm

Abstract

 
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TBA
Thu 19 Mar 2015, 3:30pm
Number Theory Seminar
room MATH 126
room MATH 126
Thu 19 Mar 2015, 3:30pm-4:30pm

Abstract

 
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UBC
Fri 20 Mar 2015, 3:00pm
Department Colloquium
LSK 200 (Note the special location)
Graduate Research Award Lecture
LSK 200 (Note the special location)
Fri 20 Mar 2015, 3:00pm-4:00pm

Abstract


Note for Attendees

Refreshments will be served at 2:40pm in the Math Lounge area, MATH 125 before the colloquium.
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TBA
Thu 26 Mar 2015, 3:30pm
Number Theory Seminar
room MATH 126
room MATH 126
Thu 26 Mar 2015, 3:30pm-4:30pm

Abstract

 
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TBA
Fri 27 Mar 2015, 3:00pm
Department Colloquium
ESB 2012
CRM-Fields-PIMS prize lecture
ESB 2012
Fri 27 Mar 2015, 3:00pm-4:00pm

Abstract


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Mathematics Manchester
Mon 30 Mar 2015, 3:00pm SPECIAL
Institute of Applied Mathematics
LSK 460
Modelling plant cell and tissue growth
LSK 460
Mon 30 Mar 2015, 3:00pm-4:00pm

Abstract

 
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Fri 11 Sep 2015, 3:00pm
Department Colloquium
reserved
Fri 11 Sep 2015, 3:00pm-4:00pm

Abstract


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Yakov Sinai
Princeton University
Fri 23 Oct 2015, 3:00pm SPECIAL
Department Colloquium / PIMS Seminars and PDF Colloquiums
ESB2012
TBA-PIMS/UBC Distinguished Colloquium
ESB2012
Fri 23 Oct 2015, 3:00pm-4:00pm
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