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Seminars, Colloquia, and Conferences

Past Colloquia

The colloquium meets on Fridays at 4:00pm in Bromfield-Pearson 101, unless otherwise indicated.

Fall 2016

September 16, 2016
Meta-mathematical framework for a new music; inspired by Algebraic Geometry
Bangere P. Purnaprajna (University of Kansas)

September 23, 2016
Tempered representations: the stellar picture
Pierre Clare (Dartmouth University)

September 30, 2016
The social role of mathematical proofs
Kenny Easwaran (Texas A&M University)

October 7, 2016
Student Presentations from Directed Reading Program
Ruth Meadow-McLeod, Ryan Kohl, and Zach Munro

October 14, 2016
Inverse Problems in Adaptive Optics
Ronny Ramlau (Johannes Kepler University Linz)

October 21, 2016
Reconfiguring Chains with Discrete Moves: Flips and Pops
Dr. Perouz Taslakian [Université libre de Bruxelles (Brussels, Belgium) and ROI Research on Investment Corp. (Montreal, Canada)]

November 4, 2016
Economic inequality from statistical physics point of view
Victor Yakovenko (University of Maryland, Physics Dept.)

Spring 2016

March 11, 2016
Elliptic Curves, Triangles and L-functions
David Roe (University of Pittsburgh)

March 18, 2016
The Theory of Chaos: Yesterday, Today and Tomorrow
Yakov Pesin (Pennsylvania State University)

April 1, 2016
Marked-length spectrum rigidity for unfriendly spaces
David Constantine (Wesleyan University)

April 8, 2016
Norbert Wiener Lecture
Noam Elkies (Harvard University)

April 15, 2016
Martin Guterman Lecture
John Urschel (MIT)

April 22, 2016
Structure of zero sets of random waves on a manifold
Yaiza Canzani (Harvard University)

Fall 2015

September 18, 2015
Talks from the Directed Reading Program
Freddy Saia, Matt DiRe, Ryan Hastings-Echo
(Tufts University)

September 25, 2015
An algorithm for phase retrieval with corrupted data
Paul Hand
(Rice University)

October 2, 2015
Understanding the Structure and Stability of Localized Patterns
Elizabeth Makrides
(Brown University)

November 13, 2015
Iwahori-Hecke algebras and Schubert calculus
Matthew Douglass
(University of North Texas, National Science Foundation)

November 20, 2015
Beyond the triangle – Brownian motion, Ito calculus, and Fokker-Planck equation: fractional generalizations
Sabir Umarov
(University of New Haven)

December 11, 2015
Path-Independent Integrals in Equilibrium Electro-Chemo-Mechanics
Jianmin Qu
(Tufts University)

Spring 2015

January 16, 2015
Live Experiments, Theorem Curation and Natural Math Understanding: The Future of Mathematics by Computer
Stephen Wolfram
(CEO of Wolfram Research)

January 23, 2015
Lagrangian Particle Methods for Vortex Dynamics
Robert Krasny
(University of Michigan)

January 30, 2015
Radon Transforms and Spherical Functions
Sigurdur Helgason
(Massachusetts Institute of Technology)

February 13, 2015
Certified reduced basis methods and reduced collocation methods
Yanlai Chen
(University of Massachusetts Dartmouth)

February 27, 2015
Random groups in number theory and random integral matrices
Melanie Matchett Wood
(University of Wisconsin, Madison)

March 6, 2015
Dynamical Chaos in Kepler Planetary Systems
Matthew Holman
(Harvard-Smithsonian Center for Astrophysics)

April 3, 2015
A differential-geometric construction of differential K-theory
Scott Wilson
(Queen's College, City University of New York)

April 10, 2015
How finite are infinite groups?
Stefan Witzel

April 17, 2015
Cascadic Multigrid for Eigenvalue Problems and Its Application in Graph Problems
Xiaozhe Hu
(Tufts University)

April 24, 2015 at 3:00pm
Entropy for smooth systems
Todd Fisher
(Brigham Young University)

Fall 2014

September 15, 2014
A Weighted Wavelet Method for Region of Interest Tomography
Esther Kann
University of Linz, Industrial Mathematics Institute

September 19, 2014
How well can you see the slope of a digital line (and other applications of the "tapering trick")?
James Propp
University of Massachusetts, Lowell

September 26, 2014
Modeling of highly deformable materials
Luis Dorfmann
Tufts University

October 3, 2014
From molecular dynamics to kinetic theory and hydrodynamics
Laure Saint-Raymond
École Normale Supérieure, Paris

October 17, 2014
Representations and subgroup structure of simple groups
Pham Tiep
University of Arizona

October 24, 2014
Statistical properties of deterministic systems by elementary means
Boris Hasselblatt
Tufts University

October 31, 2014
A New and Direct Proof of the Central Limit Theorem
Patricia Garmirian
Tufts University

November 7, 2014
Hydrokinetic approach to complex flows: the legacy of P.L. Bhatnagar
Sauro Succi
Istituto per le Applicazioni del Calcolo 'Mauro Picone'

November 14, 2014
Nonlinear stability of coherent structures via pointwise estimates
Margaret Beck

November 21, 2014
The dynamics of the normalized Ricci flow on some homogeneous spaces
Andreas Arvanitoyeorgos
Tufts University

December 5, 2014
Multiscale modeling using Lagrangian particle-based methods
Wenxiao Pan
Northwestern National Laboratory

December 12, 2014
Anderson 208
Abelian Networks: From Local to Global
Lionel Levine
Cornell University

Spring 2014

Date Speaker Title
January 17 Petra Schwer (née Hitzelberger)
Mathematisches Institut, Universität Münster
Non-positive curvature, braids and buildings
January 31 Genevieve Walsh
Tufts University
3-manifolds, surgery, and a graph
February 7 Fulton Gonzalez
Tufts University
The world of mean value operators
February 28 George McNinch
Tufts University
The Frobenius map (or: Why study things mod p?)
March 7 Todd Quinto
Tufts University
Microlocal Analysis in Limited Data Tomography
March 14 Arvind Krishna Saibaba
Tufts University
Computational Challenges in Hyperspectral Diffuse Optical Tomography
March 28 Tim Mitchell
Courant Institute, New York University
(Tufts Alumnus)
Fast approximation of the H_∞ norm via hybrid expansion-contraction using spectral value sets
April 4 Jürgen Frikel
Technische Universität München
Reconstructions in limited data tomography
April 11 Yusuf Mustopa
Northeastern University
Clifford Algebras, Old and New
April 18 Frank Filbir
Helmholtz Center München
Parameter Estimation in Exponential Sums
April 25 Michael Overton
Courant Institute, New York University
Investigation of Crouzeix's Conjecture via Optimization

Fall 2013

Date Speaker Title
September 27 Alex Barnett
Dartmouth College
"Efficient and robust integral equation methods for acoustic scattering from periodic media in 2D and 3D"
October 18 Koichi Kaizuka
University of Tsukuba, Japan
"The Strichartz conjecture on symmetric spaces"
October 25
*new date
Christoph Börgers
Department of Mathematics, Tufts University
"What is computational neuroscience, and is it good for anything?"
November 1 Kye Taylor
Department of Mathematics, Tufts University
"Image analysis with graphs"
November 8 Bruce Boghosian
Department of Mathematics, Tufts University
"Asset exchange models, the origin of Pareto's Law, and the origin of oligarchy"
November 15 Tim Atherton
Department of Physics, Tufts University
"Why topology suddenly matters in physics"
December 6 Umberto Villa
Lawrence Livermore National Laboratory
"Numerical Upscaling and Algebraic Multigrid for Mixed Finite Element Discretizations"

Spring 2013

Date Speaker Title
February 22 Diana Davis
Brown University
To be announced
March 8 David Simmons
The Ohio State University
Diophantine approximation and the geometry of limit sets in Gromov hyperbolic metric spaces
March 11
Pearson 104
Peter Winkler
Dartmouth College
Probability Puzzles that Boggle the Mind
March 12
Bromfield-Pearson Building 2
Peter Winkler
Dartmouth College
New Directions in Random Walk on a Graph
March 13
Barnum Hall 104
Peter Winkler
Dartmouth College
Random Walk and the Gittins Index
March 29 Alethea Barbaro A'03
Case Western Reserve University
Kinetics of socially interacting particles
April 5 Tai Melcher, A'99
University of Virginia
Smoothness properties for some infinite-dimensional measures
April 12 William Dunham
Muhlenberg College
An Afternoon With Euler
April 26 Zachary Faubion
Tufts University
To be announced

Fall 2012

Date Speaker Title
September 13th
Bromfield-Pearson 2
Sa'ar Hersonsky
University of Georgia
From Tiling and Packing to Uniformization
September 21st
Bromfield-Pearson 101
Mary Beth Ruskai
Department of Electrical & Computer Engineering, Tufts University
Quantum Information Theory: Recent progress and open questions
October 5th
Bromfield-Pearson 101
François Ledrappier
University of Notre Dame
Regularity of the entropy for random walks on hyperbolic groups
October 19th Kathleen Wilkie, PhD
Research Associate
Center of Cancer Systems Biology
Steward St. Elizabeth's Medical Center
Tufts University School of Medicine, Boston, MA
A Mathematical Model for Immune-Modulated Tumor Growth
October 26th Michael Shapiro
Tufts University School of Medicine, Boston, MA
Modeling host-pathogen interactions in Epstein-Barr viral infection
November 9th Thomas Barthelmé
Tufts University
Finsler geometry, Finsler Laplacian & the sound of Finslerian drums
November 16th David Fisher
Indiana University
Rigidity of higher rank Anosov actions

Spring 2012

Date Speaker Title
Friday, Feb 10 Dirk Schleicher
Jacobs University
The dynamics of Newton's method as an efficient root finder
Friday, March 9
Sergio Fenley
Friday, March 9 Margarida Melo
Universidade de Coimbra
Friday, March 16 Michael Burr
Fordham University
March 27-30
(special times)
Jordan S. Ellenberg
University of Wisconsin
Norbert Wiener Lectures:
How to Count
Friday, March 30 Jon Hall
Michigan State University
Friday, April 6 Sarah Koch
Thursday, April 12 Frank Morgan
Williams College
Guterman Lecture:
Soap Bubbles and Mathematics
Friday, April 13 Craig Sutton
Dartmouth College
Friday, April 20 Misha Kazhdan
Johns Hopkins
Can Mean Curvature Flow Be Made Non-Singular?

Fall 2011

Date Speaker Title
Wednesday, Dec 7 Lloyd N. Trefethen
University of Oxford
Robust Rational Interpolation And Padé Approximation
Tuesday, Nov 8 Lluis Alseda i Soler
Universitat Autonoma de Barcelona
Attractors for unimodal quasiperiodically forced maps
(in collaboration with M. Misiurewicz)
Friday, Nov 4 Bruce Kitchens
Indiana University-Purdue University Indianapolis
Boston University
The dynamics of the Nash map for 2 by 2 games
Friday, Oct 28 Karen Vogtmann
Cornell University
On the geometry of automorphism groups of free groups
Friday, Oct 14 Jürgen Frikel
Institute of Biomathematics and Biometry Helmholtz-Zentrum München
Sparse regularization in limited angle tomography
Friday, Sept 30 Elham Izadi
University of Georgia
Torelli Problems
Monday, Sept 26 Michael Mascagni
Department of Computer Science
Florida State University
Stochastic Methods for Solving Deterministic
PDE Systems Can Beat Deterministic Methods: An Example in Biochemical Electrostatics
Friday, Sept 23 Zbigniew Nitecki
Tufts University
Topology of subsum sets
(following up on Mathematics 135)

Spring 2011

Date Speaker Title
April 22 Nathan Dunfield
University of Illinois at Urbana-Champaign
Surfaces in finite covers of 3-manifolds: the Virtual Haken Conjecture
April 8 Alexander A. Ivanov
Imperial College
The Monster Group and Majorana Involutions
April 1 Diane Prost O'Leary
University of Maryland
Norbert Wiener Lecture
Undergraduate Seminar: Where Am I? Position from incomplete distance information, from Gauss's geodesy problems to protein structures
March 31 Diane Prost O'Leary
University of Maryland
Norbert Wiener Lecture
Seminar: Uncertainty Quantification for Ill-posed Problems
March 30 Diane Prost O'Leary
University of Maryland
Norbert Wiener Lecture
Mathematics in Words and Images The role mathematics plays in searching the web and in restoring blurred images.
March 18 Keith Burns
Northwestern University
Ergodicity of the Weil Petersson geodesic flow
March 15 John Meier
Lafayette College
The Martin Guterman Lecture
Euler, Graphs, and Surfaces
February 25 Ryan Kinser
University of Connecticut
Dimension inequalities for subspace arrangements

Fall 2010

Date Speaker Title
December 10 Enrique Pujals
Tufts University
Instituto Nacional de Matemática Pura e Aplicada
Robust and Generic Dynamics: A phenomenon/mechanism correspondence
November 12 Csaba David T'oth
University of Calgary
Enumeration of geometric graphs
October 29 Anish Ghosh
University of East Anglia
Diophantine approximation on homogeneous varieties
October 22 Jens Christensen
Norbert Wiener Center for Harmonic Analysis and Applications University of Maryland
Smoothness criteria for sampling in reproducing kernel Banach spaces
October 15 Alberto Arabia The Weil conjecture and p-adic cohomology
October 8 Martin Krupa Radboud
Universiteit Nijmegen

Spring 2010

Date Speaker Title
May 6 Alexander Elgart
Virginia Tech
Hamiltonian-based quantum computing for low-rank matrices
April 30 Liam Clegg, Victor Minden, and Daniel Brady
Tufts University
From Kills to Kilometers:
Using Centrographic Techniques and Rational Choice Theory for Geographical Pro filing of Serial Killers
April 23 Christian Benes
Brooklyn College of the City University of New York
The Schramm-Loewner Evolution
April 16 Adam Piggott
Bucknell University
On the Derived Series of Coxeter Groups
April 9 Lloyd Nicholas Trefethen
Oxford University
Four bugs on a rectangle (and the biggest numbers you've ever seen)
April 2 Predrag Cvitanović
Department of Physics
Georgia Institute of Technology
Geometry of boundary shear turbulence: a stroll through 61,506 dimensions
March 12 Matt Knepley
University of Chicago
Implementation for scientific computing: Finite element methods and fast multipole methods'
March 5 Karen Braman
South Dakota School of Mines and Technology
Third-order tensors as linear operators on a space of matrices
February 26 Frantisek Matus
Institute of Information Theory and Automation, Academy of Sciences of the Czech Republic
Matroids and entropy
February 19 Sergio Fenley
Florida State University
Princeton University
Quasigeodesic pseudo-Anosov flows
February 12 Bei Zeng
Institute for Quantum Computing, Waterloo
Quantum Error Correction beyond Stabilizer Codes

Fall 2009

Date Speaker Title
December 4 Sabir Umarov
Tufts University
Stochastic differential equations driven by a time-changed Levy process and their associated fractional differential equations
December 3 Raluca Felea
(Rochester Institute of Technology)
Composition of Fourier integral operators with fold and cusp singularities
November 20 Michele Benzi
(Emory University)
Matrix functions in quantum chemistry and network analysis
November 13 Vidhu S. Prasad
University of Massachusetts, Lowell
Hereditary tiles of the integers, and ergodic transformations preserving an infinite measure
November 6 Souleymane Konate An exact inversion algorithm for the distorted circle and line trajectory
October 30 Renato Feres
Washington University and University of Massachusetts, Amherst
Random Billiards
October 16 Kevin Wortman
(University of Utah)
Trees and groups
October 9 William Kantor
(University of Oregon)
Presentations of simple groups
October 2 Mark Meerschaert
(Michigan State)
Continuous-time random walks, fractional calculus, and applications
October 1 Sauro Succi
Istituto Applicazioni Calcolo-CNR Rome
Large scale Lattice Boltzmann simulations of cardiovascular flows on GPU hardware
September 18 Eriko Hironaka
(Florida State University)
Lehmer's problem and dynamics on surfaces
September 15 Ronny Ramlau
Industrial Mathematics Institute
Johannes Kepler Universität
Linz, Austria
Tikhonov regularization with sparsity constraints - Regularization properties, convergence rates and optimization
September 11 Stephen Wiggins
(University of Bristol)
Mixing: From ergodic theory to applications, and back again
September 4 Constantino Tsallis
CBPF, Rio de Janeiro, Brazil
Entropy, Gaussians and Lyapunov exponents: what can we do when the standard concepts come up short?
August 21 Esther Klann
Johann Radon Institute for Computational and Applied Mathematics (RICAM)
A Mumford--Shah Like Approach For Tomography Data: Reconstruction And Regularization

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