# Mathematical Sciences Research Institute

Home > Scientific > Colloquia & Seminars > Other Colloquia & Seminars

# Other Colloquia & Seminars

No current Other Seminars
1. # PD Seminar: 4-stochastic measures and polyconvexity

Location: MSRI: Simons Auditorium

Speaker: Romeo Awi

Updated on Dec 05, 2013 04:20 PM PST

1. # PD Seminar: Regularity of shadows and the singular set associated to a Monge-Ampere equation

Location: 740 Evans Hall
Speakers: Emanuel Indrei (Carnegie Mellon University)
Updated on Nov 15, 2013 09:42 AM PST
2. # PD Seminar: The spherically symmetric SU(2) Einstein-Yang-Mills equations

Location: 740 Evans Hall
Speakers: Daniel Jackson (Monash University)
Updated on Nov 15, 2013 09:41 AM PST
3. # PD Seminar: The geodesic hypothesis in general relativity

Location: 740 Evans Hall
Speakers: Shiwu Yang (University of Cambridge)
Updated on Nov 08, 2013 12:39 PM PST
4. # PD Seminar: Martingales, robust hedging and the Skorokhod embedding

Location: 740 Evans Hall
Speakers: Martin Huesmann (Universität Bonn)
Updated on Nov 07, 2013 10:24 AM PST
5. # PD Seminar: The Einstein-Yang-Mills phase space and the First Law of black hole mechanics

Location: 740 Evans Hall
Speakers: Stephen McCormick (Monash University)
Updated on Oct 30, 2013 03:07 PM PDT
6. # PD Seminar: Adding a vanishing Dirichlet energy to the Monge cost: some surprising effects

Location: 740 Evans Hall
Speakers: Jean Louet (Université Paris-Sud (Orsay))
Updated on Oct 30, 2013 03:07 PM PDT
7. # PD Seminar: Convergence of harmonic maps.

Location: 740 Evans Hall
Speakers: Zahra Sinaei (École Polytechnique Fédérale de Lausanne (EPFL))
Updated on Oct 23, 2013 04:36 PM PDT
8. # PD Seminar: Rigidity of singularities and Lorentzian splitting geometry.

Location: 740 Evans Hall
Speakers: Carlos Vega (University of Miami)
Updated on Oct 23, 2013 04:35 PM PDT
9. # PD Seminar: Linear waves on Kerr--de Sitter cosmologies

Location: 740 Evans Hall
Speakers: Volker Schlue (University of Toronto)
Updated on Oct 17, 2013 11:27 AM PDT
10. # PD Seminar: Interior curvature estimates and the asymptotic Plateau problem in hyperbolic space

Location: 740 Evans Hall
Speakers: Ling Xiao (Johns Hopkins University)
Updated on Oct 17, 2013 11:26 AM PDT
11. # PD Seminar: Strict convexity properties of solutions to Monge-Ampere type equations

Location: 740 Evans Hall
Updated on Oct 10, 2013 12:57 PM PDT
12. # PD Seminar: Far from constant mean curvature solutions to the Einstein constraint equations on compact manifolds

Location: 740 Evans Hall
Updated on Oct 03, 2013 11:19 AM PDT
13. # PD Seminar: Type-II singularities for Ricci flow on $R^n$

Location: 740 Evans Hall
Speakers: Haotian Wu (MSRI - Mathematical Sciences Research Institute)
Updated on Sep 26, 2013 02:39 PM PDT
14. # PD Seminar: Noncollision singularities in the Newtonian N-body problem

Location: 740 Evans Hall
Speakers: Jinxin Xue (University of Chicago)
Updated on Sep 26, 2013 02:38 PM PDT
15. # PD Seminar: Bochner inequality and the entropic curvature dimension condition for metric measure spaces.

Location: 740 Evans Hall
Speakers: Matthias Erbar (Rheinische Friedrich-Wilhelms-Universität Bonn)
Updated on Sep 26, 2013 09:02 AM PDT
16. # PD Seminar: Microlocal analysis of radial points.

Location: 740 Evans Hall
Speakers: Nick Haber (Stanford University)
Updated on Sep 26, 2013 09:02 AM PDT
17. # PD Seminar: On the mass/angular momentum inequality

Location: 939 Evans Hall
Speakers: Xin Zhou (Massachusetts Institute of Technology)
Updated on Sep 13, 2013 10:44 AM PDT
18. # PD Seminar: Multimarginal optimal transport on Riemannian manifolds.

Location: 939 Evans Hall
Speakers: Brendan Pass (University of Alberta)
Updated on Sep 13, 2013 10:42 AM PDT
19. # Growth of groups using Euler characteristics

Location: MSRI: Simons Auditorium
Speakers: Alexander Young (University of Washington)

A new method, currently under development, is brought forward to establish an upper bound on the growth of any finitely generated group, using a variant of monoid categories and analagous CW-complexes.

Updated on May 10, 2013 10:59 AM PDT
20. # Computing critical values of quadratic Dirichlet L-functions, with an eye toward their moments.

Location: MSRI: Simons Auditorium
Speakers: Matthew Alderson

Moments of L-functions has been a topic of intense research in recent years. Through the integration of random matrix theory and multiple Dirichlet series with traditional number theoretic arguments, methods for studying the moments of L-functions have been developed and, in turn, have lead to many well-posed conjectures for their behavior. In my talk, I will discuss the (integral) moments of quadratic DIrichlet L-functions evaluated at the critical point s=1/2. In particular, I will present formulas for computing the critical values for such L-functions and then compare the data for the corresponding moments to the (aforementioned) conjectured moments.
Created on Apr 15, 2011 09:13 AM PDT
21. # New computations of the Riemann zeta function

Location: MSRI: Simons Auditorium
Speakers: Jonathan Bober

I'll describe the implementation of Hiary's O(t1/3) algorithm and the computations that we have been running using it. Some highlights include the 10^32nd zero (and a few hundred of its neighbors, all of which lie on the critical line), values of S(T) which are larger than 3, and values of zeta larger than 14000.
Created on Apr 15, 2011 09:11 AM PDT
22. # Review and recent works on the large time asymptotics for Hamilton-Jacobi equations

Location: MSRI: Baker Board Room
Speakers: Hiroyoshi MITAKE

Created on Apr 08, 2011 06:19 AM PDT
23. # FBP-Informal Seminar

Location: MSRI: Baker Board Room
Speakers: TBA, Lihe Wang

Updated on Apr 01, 2011 03:03 AM PDT
24. # Moment Polynomials for the Riemann Zeta Function

Location: MSRI: Simons Auditorium
Speakers: Shuntaro Yamagishi

I will explain how we calculated the coefficients of moment
polynomials for the Riemann zeta function for k = 4,5.., 13
and numerically tested them against the moment polynomial conjecture.
Updated on Mar 31, 2011 04:37 AM PDT
25. # Averages of central L-values

Location: MSRI: Simons Auditorium
Speakers: TBA

Updated on Apr 01, 2011 08:17 AM PDT
26. # Non-Degeneracy of an Elliptic-Free Boundary Problem

Location: MSRI: Simons Auditorium
Speakers: Betul Orcan (University of Texas)

In this talk, we will consider a free boundary problem with a
very general free boundary condition and analyze the non-degeneracy of the
largest subsolution near the free boundary.
Updated on Mar 31, 2011 04:36 AM PDT
27. # "Computing L-functions in SAGE"

Location: MSRI: Simons Auditorium
Speakers: Rishikesh

Created on Mar 23, 2011 08:26 AM PDT
28. # Elliptic curves of arbitrarily large rank (Over Function Fields)

Speakers: Kevin Wilson

Updated on Mar 14, 2011 08:03 AM PDT
29. # Empirical Evidence for an Arithmetic Analogue of Nevanlinna's Five Value Theorem

Location: MSRI: Baker Board Room
Speakers: James Weigandt

Updated on Feb 28, 2011 07:57 AM PST
30. # Postdoctoral Seminars FBP

Created on Feb 18, 2011 04:31 AM PST
31. # A problem related to the ABC conjecture

Speakers: Danial Kane (Harvard University)

Updated on Feb 13, 2011 03:01 AM PST
32. # Nonlocal equations and new notions of curvature

Location: MSRI: Baker Board Room
Speakers: Nestor Guillen

Updated on Feb 13, 2011 03:00 AM PST
33. # Brandt module of ternary quadratic forms

Location: MSRI: Baker Board Room
Speakers: Gonzalo Tornaría

Updated on Feb 13, 2011 02:59 AM PST
34. # Regularity for Elliptic Equations with Discontinous BMO Coefficients in Reifenberg Flat Domains

Location: MSRI: Simons Auditorium

Pizza Lunch

Updated on Feb 04, 2011 05:25 AM PST
35. # "Low-lying zeros of Dedekind zeta functions"

Location: MSRI: Simons Auditorium
Speakers: Andrew Yang

Pizza Lunch

Updated on Feb 04, 2011 05:52 AM PST
36. # Postdoctoral Seminars FBP

Location: MSRI: Baker Board Room

Pizza Lunch

Updated on Jan 24, 2011 08:17 AM PST
37. # Postdoctoral and Graduate Student Seminar TBA

Location: MSRI: Simons Auditorium

Pizza Lunch

Updated on May 13, 2013 11:01 PM PDT
38. # Gluing semiclassical resolvent estimates via propagation of singularities.

Location: MSRI: Baker Board Room
Speakers: Kiril Datchev

Pizza Lunch

Updated on Dec 05, 2010 06:23 AM PST
39. # Lower bounds for the volume of the nodal sets

Location: MSRI: Simons Auditorium
Speakers: Hamid Hezari

Pizza Lunch

Updated on Nov 29, 2010 03:26 AM PST
40. # Non-intersecting Brownian Motions at a Tacnode: Soft and Hard Edge Case.

Location: MSRI: Simons Auditorium

Pizza Lunch

Updated on Nov 29, 2010 03:22 AM PST
41. # Harmonic maps into conic surfaces with cone angles less than $2\pi$

Updated on Nov 22, 2010 03:33 AM PST
42. # A tale of two tiling problems

Speakers: Benjamin Young

Updated on May 29, 2013 09:25 AM PDT
43. # Postdoctoral and Graduate Student Seminar TBA

Location: MSRI: Baker Board Room

Pizza Lunch

Updated on May 13, 2013 11:01 PM PDT
44. # Dihedral symmetry and the Razumov-Stroganov Ex-Conjecture

Location: MSRI: Baker Board Room

Pizza Lunch

Updated on Nov 05, 2010 07:12 AM PDT
45. # Geometric structures in the study of the geodesic ray transform

Location: MSRI: Simons Auditorium
Speakers: Juha-Matti Perkkio

Pizza Lunch

Updated on Oct 29, 2010 06:27 AM PDT
46. # "Edge scaling limits for non-Hermitian random matrices"

Location: MSRI: Simons Auditorium
Speakers: Martin Bender

Updated on Oct 29, 2010 07:57 AM PDT
47. # Postdoctoral and Graduate Student Seminar TBA

Location: MSRI: Simons Auditorium

Pizza Lunch

Updated on May 13, 2013 11:01 PM PDT
48. # From Oscillatory Integrals to a Cubic Random Matrix Model"

Speakers: Alfredo Deaño

Pizza Lunch

Updated on Oct 23, 2010 05:07 AM PDT
49. # Application of Riemann-Hilbert Problems in Modelling of Cavitating Flow

Location: MSRI: Simons Auditorium
Speakers: Anna Zemlyanova

Pizza Lunch

Updated on Oct 18, 2010 02:57 AM PDT
50. # Albrecht Durer, Magic Squares, and Unitary Matrix Integrals

Location: MSRI: Simons Auditorium
Speakers: Jonathan Novak

Pizza Lunch

Updated on Dec 04, 2013 12:45 PM PST
51. # Imaging Edges in Random Media

Location: MSRI: Simons Auditorium
Speakers: Fernando Guevara Vasquez

Pizza Lunch

Consider the problem of imaging a reflector (target) from recordings of the echoes resulting from probing the medium with waves emanating from an array of transducers (the array response matrix). We present an algorithm that selectively illuminates the edges or the interior of an extended target by choosing particular subspaces of the array response matrix. For a homogeneous background medium, we characterize these subspaces in terms of the singular functions of a space and wave number restricting operator, which are also called generalized prolate spheroidal wave functions. We discuss results indicating what can be expected from using this algorithm when the medium fluctuates around a constant background medium and the fluctuations can be modeled as a random field.
Updated on May 13, 2013 11:01 PM PDT
52. # Integrable Equations for Random Matrix Spectral Gap Probabilities

Location: MSRI: Simons Auditorium
Speakers: Igor Rumanov

Pizza Lunch

Connections are exposed between integrable equations for spectral gap probabilities of unitary invariant ensembles of random matrices (UE) derived by different --- Tracy-Widom (TW) and Adler-Shiota-van Moerbeke (ASvM) --- methods. Simple universal relations are obtained between these probabilities and their ratios on one side, and variables of the approach using resolvent kernels of Fredholm operators on the other side. A unified description of UE is developed in terms of universal, i.e. independent of the specific probability measure, PDEs for gap probabilities, using the correspondence of TW and ASvM variables. These considerations are based on the three-term recurrence for orthogonal polynomials (OP) and one-dimensional Toda lattice (or Toda-AKNS) integrable hierarchy whose flows are the continuous transformations between different OP bases. Similar connections exist for coupled UE. The gap probabilities for one-matrix Gaussian UE (GUE) or joint gap probabilities for coupled GUE satisfy various PDEs whose number grows with the number of spectral endpoints. With the above connections serving as a guide, minimal complete sets of independent lowest order PDEs for the GUE and for the largest eigenvalues of two-matrix coupled GUE are found.
Updated on May 13, 2013 11:01 PM PDT
53. # The Inverse Calderon Problem for Schrödinger Operator on Riemann Surfaces

Location: MSRI: Simons Auditorium
Speakers: Leo tzou

Pizza Lunch

We show that on a smooth compact Riemann surface with boundary (M0, g) the Dirichletto- Neumann map of the Schrödinger operator â g + V determines uniquely the potential V . This seemingly analytical problem turns out to have connections with ideas in symplectic geometry and differential topology. We will discuss how these geometrical features arise and the techniques we use to treat them. This is joint work with Colin Guillarmou of CNRS Nice. The speaker is partially supported by NSF Grant No. DMS-0807502 during this work.
Updated on May 13, 2013 11:01 PM PDT
54. # E. Nordenstam's Talk

Location: MSRI: Simons Auditorium
Speakers: Eric Nordenstam

Pizza Lunch

Updated on May 13, 2013 11:01 PM PDT
55. # Resistor Networks and Optimal Grids for Electrical Impedance Tomography with Partial Boundary Measurements

Location: MSRI: Baker Board Room
Speakers: Alexander Mamonov

Pizza Lunch

The problem of Electrical Impedance Tomography (EIT) with partial boundary measurements is to determine the electric conductivity inside a body from the simultaneous measurements of direct currents and voltages on a subset of its boundary. Even in the case of full boundary measurements the non-linear inverse problem is known to be exponentially ill-conditioned. Thus, any numerical method of solving the EIT problem must employ some form of regularization. We propose to regularize the problem by using sparse representations of the unknown conductivity on adaptive finite volume grids known as the optimal grids. Then the discretized partial data EIT problem can be reduced to solving the discrete inverse problems for resistor networks. Two distinct approaches implementing this strategy are presented. The first approach uses the results for the EIT problem with full boundary measurements, which rely on the use of resistor networks with circular graph topology. The optimal grids for such networks are essentially one dimensional objects, which can be computed explicitly. We solve the partial data problem by reducing it to the full data case using the theory of extremal quasiconformal (Teichmuller) mappings. The second approach is based on resistor networks with the pyramidal graph topology. Such network topology is better suited for the partial data problem, since it allows for explicit treatment of the inaccessible part of the boundary. We present a method of computing the optimal grids for the networks with general topology (including pyramidal), which is based on the sensitivity analysis of both the continuum and the discrete EIT problems. We present extensive numerical results for the two approaches. We demonstrate both the optimal grids and the reconstructions of smooth and discontinuous conductivities in a variety of domains. The numerical results show two main advantages of our approaches compared to the traditional optimization-based methods. First, the inversion based on resistor networks is orders of magnitude faster than any iterative algorithm. Second, our approaches are able to correctly reconstruct the conductivities of very high contrast, which usually present a challenge to the iterative or linearization-based inversion methods.
Updated on May 13, 2013 11:01 PM PDT