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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 2018

September 7, 2018
Zhengwei Liu, Harvard University
Title: Quantum Fourier Analysis
Abstract: We first recall some classical inequalities and uncertainty principles in Fourier analysis. Then we discuss our recent work on Fourier analysis in various subjects, including subfactors, planar algebras, Kac algebras, locally compact quantum groups, modular tensor categories. Moreover, we provide a 2D picture language to study Fourier analysis. Finally, we discuss some applications and open questions.

September 14, 2018
No colloquium this week.

September 21, 2018
Christina Sormani, CUNY
Abstract: The spacelike universe is curved by gravity forming deep wells around massive objects. A black hole is formed when it is curved so strongly that a neck forms and the apparent horizon is the minimal sphere around that neck. The ADM mass of an asymptotically flat region in space is measured by the decay of the curvature near infinity. Shing-Tung Yau and Richard Schoen proved that in such spaces the ADM mass must be nonnegative, and if the ADM mass is 0 then the space is flat Euclidean space with no curvature at all. Here we present recent joint work with Dan Lee, Lan-Hsuan Huang, and Iva Stavrov proving that in special settings, spaces with small ADM mass are almost Euclidean space. All students who have completed vector calculus are welcome to attend.

September 28, 2018
Anna Haensch, Duquesne University
Title: 17 Facts About Science Writing That Will Totally Blow Your Mind
Abstract: Scientists are always doing research. Occasionally, they do something catchy and it gets covered by the mainstream media. I'm going to talk about how that science gets from the lab bench to the Twitter feed, and trace the evolution of facts as science becomes journalism and what gets lost and gained along the way. Next, I'll show you all the ways that math and science actually show up in mainstream journalism even when the stories have nothing to do with science! Finally, I'll make the case for scientific and numerical literacy as a necessary skill for understanding the news, promoting social justice and participating in the democratic process.

October 5, 2018 *NOTE: Talk will be held in Science & Engineering Complex (SEC), Anderson Room 206*
Shing-tung Yau, Harvard University
Title: Quasilocal Mass in General Relativity
Abstract: I will talk about the problem of defining conserved quantities in general relativity and explain their properties.

October 12, 2018
Student Presentations from the Directed Reading Program

Eva Sachar (graduate student mentor: Casey Cavanaugh)
Title: An Application of Clustering to Socioeconomic Data
Abstract: When analyzing socioeconomic data we wish to uncover its inherent and underlying structure. We will be presenting a few approaches to clustering and discussing their advantages and disadvantages when applied to a housing dataset, and see if the results of clustering on property characteristics and census block demographics accurately reflect tiering in housing prices.

Carter Silvey (graduate student mentor: Matthew Friedrichsen)
Title: Fractal Geometry
Abstract: Fractals are some of the most beautiful and mysterious things to come out of mathematics. I’m going to discuss the geometry behind these fractals, such as how they are created and their dimensions. Specifically, I will talk about the Middle Third Cantor Set, Julia Sets, and the Mandelbrot Set as well as some applications that fractal geometry has in both the realm of mathematics and the real world.

October 19, 2018
Michael Geline, Northern Illinois University
Title: The conjectures of Brauer's block theory, and the role of integral representations
Abstract: Frobenius's local to global principle for finite groups asserts that properties of G, related to a prime p, should be controlled by analogous properties of normalizers of proper p-subgroups of G. Examples of properties of interest include the existence of normal subgroups with index p and the existence of irreducible representations with dimension divisible by a fixed power of p. Brauer, Alperin, and Broue have given quite a few specific conjectures of this nature which remain open to the present day, partly because no one knows whether to expect proofs to depend on the classification of finite simple groups. I will state several of these conjectures and summarize how they have influenced my work on p-adic representations.

October 26, 2018

Dubi Kelmer, Boston College
Title: Shrinking target problems, homogenous dynamics and Diophantine approximations
Abstract: The shrinking target problem for a dynamical system tries to answer the question of how fast can a sequence of targets shrink so that a typical orbit will keep hitting them indefinitely. I will describe some new and old results on this problem for flows on homogenous spaces, with various applications to problems in Diophantine approximations.

November 2, 2018
Daryl DeFord, MIT/Tufts University
Title: Matched Products and Stirling Numbers of Graphs
Abstract: In this talk I will introduce the matched product for graphs, motivated by a popular construction for modeling multiplex networks. The matched product depends on consistent labelings of the nodes in the component graphs and recovers the Cartesian, rooted, and hierarchical products as special cases. There are natural conditions for the product to be planar, Hamiltonian, and Eulerian in terms of the corresponding properties on the laers and we will also consider the related problem of computing the probability that a random relabeling of a given graph preserves each property. In addition to these traditional graph-theoretic properties, the matched product naturally defines several families of graphs whose Stirling numbers of the first kind can be enumerated in terms of the component values. We will see some explicit examples of these families with combinatorial proofs in terms of the Pell numbers and discuss a connection between this enumeration problem and gerrymandering.

November 9, 2018
Jennifer Balakrishnan, Boston University
Title: Rational points on the cursed curve
Abstract: How do we compute rational points on curves? I'll present a selection of techniques and motivating examples, from antiquity to modern times. One particularly interesting example is the split Cartan modular curve of level 13, also known as the "cursed curve," a genus 3 curve defined over the rationals. By Faltings' proof of Mordell's conjecture, we know that it has finitely many rational points. However, Faltings' proof does not give an algorithm for finding these points. We discuss how to determine rational points on this curve using "quadratic Chabauty," part of Kim's nonabelian Chabauty program. This is joint work with Netan Dogra, Steffen Mueller, Jan Tuitman, and Jan Vonk.

November 16, 2018
Bob Holt, University of Florida
Title: Niche conservatism, evolution, and applied ecology: Theoretical perspectives
Abstract: The Hutchinsonian niche of a species is defined to be that set of abiotic and biotic conditions allowing it to persist. Much of the diversity of life reflects evolution in species' niches. The evolutionary record reveals a spectrum of rates of change in species' and clade niches, from rapid niche evolution to profound niche conservatism. Understanding the determinants of evolution vs. conservatism in niches is of key importance in many vital applied arenas, ranging from controlling the evolution of resistance to pesticides and antibiotics, to facilitating evolutionary rescue in species facing extinction in changed environments. Theoretical studies of niche evolution with explicit demography and genetics in spatially and temporally heterogeneous environments can help illuminate when one might expect niche conservatism, vs. evolution. This talk will provide an overview of such studies. The mathematical topics touched upon will include how demographic stochasticity can alter niche quantification, the use of branching processes to illuminate niche evolution, and surprising effects that emerge from the interplay of spatial processes and temporal variability.

November 30, 2018
Carolyn Abbott, UC Berkeley
Title: Random walks on groups acting on hyperbolic spaces
Abstract: Imagine you are standing at the point 0 on a number line, and you take a step forward or a step backwards, each with probability 1/2. If you take a large number of steps, is it likely that you will end up back where you started? What if you are standing at a vertex of an 4-valent tree, and you take a step in each of the 4 possible directions with probability 1/4? This process is special case of what is called a random walk on a space. If the space you choose is the Cayley graph of a group (as these examples are), then a random walk allows you to choose a "random" or "generic" element of the group by taking a large number of steps and considering the label of the vertex where you end up. One can ask what properties a generic element of the group is likely to have: for example, is it likely that the element you land on has infinite order? In this talk, I will discuss the algebraic and geometric properties of generic elements of groups which act "nicely" on hyperbolic metric spaces, with a focus on how such elements interact with certain subgroups of the group. These results will apply to generic elements of hyperbolic groups, relatively hyperbolic groups, mapping class groups, many fundamental groups of 3—manifolds, the outer automorphism group of a free group of rank at least two, and CAT(0) groups with a rank one element, among many others. This is joint work with Michael Hull.

December 7, 2018
Gianluca Caterina, Endicott College
Title: The diagrammatic logic of C.S. Peirce: An approach via generic figures
Abstract: At the turn of the 20th century, the American philosopher and logician Charles Sanders Peirce developed a logical system based on diagrams ("existential graphs") that capture the essential features of what is currently know as first-order logic. We will present an introduction to Peirce's work in logic, along with a tentative model aimed to represent the existential graphs within a category-theory framework.
The talk will be accessible to undergraduates in both Mathematics and Philosophy.

Spring 2018

January 19, 2018
Gaussian Curvature and Gyroscopes
Mark Levi (The Pennsylvania State University)

February 16, 2018
Title - TBD

February 23, 2018
Title - TBD

March 2, 2018
Title - TBD

March 9, 2018
Skew Flat Fibrations
Michael Harrison (Lehigh University)

March 16, 2018
Dual singularities in exceptional type nilpotent cones
Paul Levy (Lancaster University, UK)

March 23, 2018
SPRING BREAK - no Colloquium

April 6, 2018
Developing a Coherent Approach to Multiplication in School Mathematics
Andrew Izsak (Tufts University)

April 20, 2018
Uniform distribution, generalized polynomials and the theory of multiple recurrence
Vitaly Bergelson (Ohio State University)

Spring 2017

February 10, 2017
From Homogeneous Metric Spaces to Lie Groups
Sebastiano Nicolussi Golo (University of Jyväskylä & University of Trento)

February 24, 2017
Diophantine and tropical geometry
David Zureick-Brown (Emory University)

March 3, 2017
Reflection Positivity: Representation Theory meets Quantum Field Theory
Gestur Olafsson (LSU)

March 10, 2017
Diffusion of Lorentz gas on scatterers with flat point
Hongkun Zhang (UMass Amherst)

March 17, 2017
Numerical difficulties in the simulation of flow in deformable porous media
Carmen Rodrigo (University of Zaragoza, Spain)

March 31, 2017
Equidistribution of Shapes of Number Fields of degree 3, 4, and 5
Piper Harron (University of Hawaii)

April 7, 2017
Fun with Finite Covers of 3-Manifolds: Connections between Topology, Geometry, and Arithmetic
Nathan Dunfield (University of Illinois at Urbana-Champagne)

April 14, 2017
Crossing Matrices for Braids
Zbigniew Nitecki (Tufts University)

April 21, 2017
Inhibition-based theta resonance in a hippocampal network
Horacio Rotstein (New Jersey Institute of Technology)

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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