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Calendar: Events for week of May 7, 2018

May 7

2:30 pm

2:30 pm

Ivan Smith (Cambridge)

“Lagrangian Cobordism and Tropical Curves”

“Lagrangian Cobordism and Tropical Curves”

May 7

2:30 pm

2:30 pm

Number Theory Seminar

Math 383-N

Math 383-N

Jordan Ellenberg (University of Wisconsin)

“Heights on Stacks”

“Heights on Stacks”

May 7

4:00 pm

4:00 pm

Probability Seminar

Sequoia Hall Room 200

Sequoia Hall Room 200

Stewart Ethier (University of Utah)

“A Population Genetics Interpretation of the Two-Parameter Poisson-Dirichlet Distribution”

“A Population Genetics Interpretation of the Two-Parameter Poisson-Dirichlet Distribution”

May 7

4:00 pm

4:00 pm

Chiu-Chu Melissa Liu (Columbia)

“Mirror Symmetry for Symplectic Toric Calabi-Yau 3-folds”

“Mirror Symmetry for Symplectic Toric Calabi-Yau 3-folds”

May 8

4:00 pm

4:00 pm

Analysis & PDE Seminar

Math 383-N

Math 383-N

Andras Vasy (Stanford)

“Fredholm Theory and the Resolvent of the Laplacian Near Zero Energy on Asymptotically Conic Spaces”

“Fredholm Theory and the Resolvent of the Laplacian Near Zero Energy on Asymptotically Conic Spaces”

May 8

7:30 pm

7:30 pm

Public Lecture: David Donoho

Cubberley Auditorium

Cubberley Auditorium

David Donoho (Stanford University)

Leaping from Blackboard to Bedside: Medical Imaging and Higher-Dimensional Geometry In 2017, a new magnetic resonance imaging (MRI) device by General Electric and Siemens entered the marketplace with an advertised 10-fold speedup over traditional MRI and the potential to impact 80 million MRI scans annually. This talk will discuss the applications and some of the mathematics behind this advance, coming from the field of “compressed sensing” that leverages higher-dimensional geometry in novel ways.

Leaping from Blackboard to Bedside: Medical Imaging and Higher-Dimensional Geometry In 2017, a new magnetic resonance imaging (MRI) device by General Electric and Siemens entered the marketplace with an advertised 10-fold speedup over traditional MRI and the potential to impact 80 million MRI scans annually. This talk will discuss the applications and some of the mathematics behind this advance, coming from the field of “compressed sensing” that leverages higher-dimensional geometry in novel ways.

May 9

12:30 pm

12:30 pm

Faculty Area Research

Math 384-H

Math 384-H

Jun Li (Stanford)

“Degeneration Method in Moduli Spaces (in algebraic geometry)” I will outline the construction of the stack of expanded degeneration, and show how this is used to study degeneration of moduli spaces. In the end, I will mention the challenge in how to generalize this construction to deal with moduli problems with strictly semi stable objects.

“Degeneration Method in Moduli Spaces (in algebraic geometry)” I will outline the construction of the stack of expanded degeneration, and show how this is used to study degeneration of moduli spaces. In the end, I will mention the challenge in how to generalize this construction to deal with moduli problems with strictly semi stable objects.

May 9

3:15 pm

3:15 pm

Geometry Seminar

Math 383-N

Math 383-N

Steven Rayan (Saskatchewan)

“Geometry of Weightless Kapustin-Witten Solutions on the Plane”

“Geometry of Weightless Kapustin-Witten Solutions on the Plane”

May 10

3:00 pm

3:00 pm

Combinatorics Seminar

Math 384-H

Math 384-H

László Miklós Lovász (UCLA)

“Graph Limits and Finite Forcibility” We study the uniqueness of optimal solutions to extremal graph theory problems. Lovász conjectured that every finite feasible set of subgraph density constraints can be extended further by a finite set of density constraints so that the resulting set is satisfied by an asymptotically unique graph.

“Graph Limits and Finite Forcibility” We study the uniqueness of optimal solutions to extremal graph theory problems. Lovász conjectured that every finite feasible set of subgraph density constraints can be extended further by a finite set of density constraints so that the resulting set is satisfied by an asymptotically unique graph.

May 11

11:30 am

11:30 am

Student Analysis Seminar

Math 384-I

Math 384-I

Kevin Yang

“Calderon-Zigmund Theory for Random Elliptic Equations”

“Calderon-Zigmund Theory for Random Elliptic Equations”

May 11

4:30 pm

4:30 pm

Algebraic Geometry Seminar

Math 383-N

Math 383-N

Sheldon Katz (UIUC)

“Refined BPS invariants of local surfaces and representations of affine E_8” Inspired by the work of Huang-Klemm-Poretschkin on the refined E-string, in this work in progress I give evidence for a conjecture that for a class of algebraic surfaces S with -K nef, the cohomology of the moduli space of 1-dimensional stable sheaves F with euler characteristic 1 supports a natural and non-trivial representation of a semisimple or affine Lie algebra g(S).

“Refined BPS invariants of local surfaces and representations of affine E_8” Inspired by the work of Huang-Klemm-Poretschkin on the refined E-string, in this work in progress I give evidence for a conjecture that for a class of algebraic surfaces S with -K nef, the cohomology of the moduli space of 1-dimensional stable sheaves F with euler characteristic 1 supports a natural and non-trivial representation of a semisimple or affine Lie algebra g(S).

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