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 Events
UAlberta
Wed 26 Nov 2014, 3:00pm
CRG Geometry and Physics Seminar
ESB 4127 (host: UAlberta)
TBA
ESB 4127 (host: UAlberta)
Wed 26 Nov 2014, 3:00pm-4:00pm

Abstract

 TBA
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Stefan Adams
Warwick University
Wed 26 Nov 2014, 3:10pm
Probability Seminar
ESB 2012
Phase Transitions in Continuum Delaunay Potts Models
ESB 2012
Wed 26 Nov 2014, 3:10pm-4:10pm

Abstract

We discuss recent results on phase transitions of  Delaunay Potts models in dimension two where the interaction depends on Delaunay edges respectively Delaunay triangles.

This work is an extension of the Lebowitz & Lieb soft-core continuum Potts model to geometrically dependent interaction systems. The main tool is a FK (Fortuin-Kasteleyn)  random cluster representation adapted to the Delaunay structure and percolation in the FK model.  If time permits we discuss the Voronoi-Ising model where the interaction is function of the length of the common boundary and its connection to variants of the RSW (Russo-Seymour-Welsh) theorem in continuum percolation. 

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MIT
Wed 26 Nov 2014, 3:15pm
Topology and related seminars
ESB 4133
The six operations of Grothendieck in equivariant motivic homotopy theory
ESB 4133
Wed 26 Nov 2014, 3:15pm-4:15pm

Abstract

The formalism of six operations encodes the functorial behavior of (co)homology theories. It was first introduced by Grothendieck for the l-adic cohomology of schemes, and was later developed in a variety of other geometric contexts: D-modules on schemes, spectra parametrized by topological spaces, motivic spectra parametrized by schemes, etc. Equivariant homotopy theory is also best understood as a formalism of six operations for topological stacks. In this talk I will discuss the basics and the significance of this formalism, and I will then describe an extension of motivic homotopy theory to algebraic stacks.
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Abdul Kara
Witwatersrand University
Wed 26 Nov 2014, 3:30pm
Symmetries and Differential Equations Seminar
MATH 125
Symmetry structures of manifolds Part II
MATH 125
Wed 26 Nov 2014, 3:30pm-4:30pm

Abstract


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Oxford University
Thu 27 Nov 2014, 3:30pm
Number Theory Seminar
room MATH 126
Auto-correlations of divisor functions in function fields
room MATH 126
Thu 27 Nov 2014, 3:30pm-4:30pm

Abstract

In this seminar I will discuss a function field analogue of a classical problem in analytic number theory, concerning the auto-correlations of divisor functions, in the limit of a large finite field.
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University of Oregon
Fri 28 Nov 2014, 2:00pm SPECIAL
Diff. Geom, Math. Phys., PDE Seminar
ESB 4133 (PIMS lounge)
Geometric flow on almost Hermitian manifolds
ESB 4133 (PIMS lounge)
Fri 28 Nov 2014, 2:00pm-3:00pm

Abstract

 

Note for Attendees

 Note unusual day and time.
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UBC
Fri 28 Nov 2014, 3:00pm
Department Colloquium
MATX 1100
Graduate Research Award lecture: Magnetized Target Fusion: Insights from Mathematical Modelling
MATX 1100
Fri 28 Nov 2014, 3:00pm-4:00pm

Abstract

Magnetized target fusion reactors are a modern design to for hydrogen fusion energy on earth. The design entails confining a plasma with a magnetic field and crushing it in an imploding shell of molten metal. Such a design has many unresolved questions in terms of its feasibility as a power source and the most important elements in making it efficient. In this talk, we will look into two of the approaches undertaken to explore these questions. Firstly, through a coordinate transformation and implementing a novel flux-limited, split-step, finite volume scheme for nonlinear coupled hyperbolic partial differential equations, we do a parameter sensitivity analysis for the design performance. Secondly, by a careful series of asymptotic arguments, we establish a leading order asymptotic expression for the plasma compression. This expression is qualitatively consistent with the numerical work, but it also gives new insights into how the device operates. We will conclude with a look into the viability of magnetized target fusion and its future work.

Note for Attendees

Refreshments will be served at 2:45pm in the Math Lounge area, MATH 125 before the colloquium.


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UBC
Mon 1 Dec 2014, 3:00pm
CRG Geometry and Physics Seminar
ESB 4127 (host: UBC)
The topological Fukaya category and mirror symmetry for toric Calabi-Yau threefolds
ESB 4127 (host: UBC)
Mon 1 Dec 2014, 3:00pm-4:00pm

Abstract

The Fukaya category of open symplectic manifolds is expected to have good local-to-global properties. Based on this idea several people have developed sheaf-theoretic models for the Fukaya category of punctured Riemann surfaces: the name topological Fukaya category appearing in the title refers to the (equivalent) constructions due to Dyckerhoff-Kapranov, Nadler and Sibilla-Treumann-Zaslow. In this talk I will introduce the topological Fukaya category and explain applications to Homological Mirror Symmetry for toric Calabi-Yau threefolds. This is work in progress joint with James Pascaleff.
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