Codes and Expansions (CodEx) Seminar

A pan-university, remote seminar on the theory and applications of harmonic analysis, combinatorics, and algebra.

Tuesdays at 10 a.m. PDT / 1 p.m. EDT / 5 p.m. UTC / 7 p.m. CEST

Zoom. To access the Zoom link, please join the mailing list by entering your information here.

Recorded talks are on our Youtube channel.

Organized by:
Joey Iverson (Iowa State University)
John Jasper (South Dakota State University)
Emily King (Colorado State University)
Dustin Mixon (The Ohio State University)

Upcoming talks:

April 20, 2021Marcin Bownik (University of Oregon): "Multiplication-invariant operators and the classification of abelian group frames" Abstract
April 27, 2021Azita Mayeli (City University of New York, the Graduate Center)
May 4, 2021Cynthia Vinzant (North Carolina State University)
May 11, 2021Steve Butler (Iowa State University)
May 18, 2021Radu Balan (University of Maryland)
May 25, 2021Elina Robeva (University of British Columbia)
June 1, 2021Joseph Cummings (University of Kentucky)
June 8, 2021Mikhail Ganzhinov (Aalto University)
June 15, 2021Rima Alaifari (ETH Zürich)
June 22, 2021Nadiia Derevianko (Universität Göttingen)
June 29, 2021Xuemei Chen (University of North Carolina Wilmington)
July 6, 2021Nathan Lindzey (University of Colorado Boulder)
July 13, 2021Davi Castro-Silva (Universität zu Köln)
July 20, 2021Charles Clum (The Ohio State University)
July 27, 2021Nate Strawn (Georgetown University)
August 3, 2021Matt Hermann (Fourier Genetics)
August 10, 2021
August 17, 2021‪Romanos Diogenes-Malikiosis (Aristotle University of Thessaloniki)
August 24, 2021Longxiu Huang (University of California Los Angeles)
August 31, 2021Mauro Maggioni (Johns Hopkins University)
September 7, 2021Armenak Petrosyan (Georgia Institute of Technology)
September 14, 2021Tom Needham (Florida State University)
September 21, 2021
September 28, 2021

Past talks:

April 13, 2021Gary Greaves (Nanyang Technological University): "Real equiangular line systems in low dimensions" Abstract | Video | Slides
April 6, 2021Robert Calderbank (Duke University): "Coherent Noise" Abstract |
March 30, 2021Vignon Oussa (Bridgewater State University): "Why are topics such as differential geometry and representation theory useful to frame theory?" Abstract | Video
March 23, 2021Zilin Jiang (Arizona State University): "Spherical two-distance sets and spectral theory of signed graphs" Abstract " Video
March 16, 2021Daniel Freeman (St Louis University): "Discretizing L_p norms" Abstract | Video
March 9, 2021Keaton Hamm (The University of Texas at Arlington): "Column Selection and You" Abstract | Video
March 2, 2021Ram Zamir (Tel Aviv University): "Asymptotic Frame Theory for Analog Coding" Abstract | Video | Slides
February 23, 2021Joshua A. Grochow (University of Colorado Boulder): "Codes and Expansions in Algorithms for Matrix Multiplication" Abstract | Video | Slides
February 16, 2021Karin Schnass (Universität Innsbruck): "Random submatrices with non-uniformly distributed supports" Abstract | Video
February 9, 2021Eugenio Hernández (Universidad Autónoma de Madrid): "Spaces invariant under unitary representations and the bracket" Abstract | Slides | Video
February 2, 2021Emily J. King (Colorado State University): "A Potpourri of Projective 2-Designs" Abstract | Video | Slides
January 26, 2021Steven Flammia (AWS Center for Quantum Computing): "Ghosts, Necromancy, and Zauner's Conjecture" Abstract | Video
December 8, 2020Chris Heil (Georgia Tech): "Frames, Erasures, and Excess in Infinite Dimensions" Abstract | Video | Slides
December 1, 2020Hartmut Führ (RWTH Aachen): "Frames of translates and the bandwidth intuition" Abstract | Video | Slides
November 17, 2020Philipp Petersen (Universität Wien): "Functions with structured singularities" Abstract | Video
November 10, 2020Alex Cloninger (University of California at San Diego): "Fast Statistical and Geometric Distances Between Families of Distributions" Abstract | Video
November 3, 2020Gerlind Plonka-Hoch (Universität Göttingen): "Optimal Rank-1 Hankel Approximation of Matrices" Abstract | Video | Slides
October 27, 2020Akram Aldroubi (Vanderbilt University): "Transport transforms for data analysis and machine learning" Abstract | Video
October 20, 2020Dustin G. Mixon (The Ohio State University): "Symmetry and optimality in codes" Abstract | Video
October 13, 2020John J. Benedetto (University of Maryland): "Spectral super-resolution and unique extensions for complex measures" Abstract | Video
October 6, 2020Shahaf Nitzan (Georgia Tech): "A few remarks on 'good' exponential Riesz bases" Abstract
September 29, 2020Boris Bukh (Carnegie Mellon University): "Ranks of matrices with few distinct entries" Abstract | Video
September 22, 2020Eric Weber (Iowa State University): "Conjugate Phase Retrieval in Paley-Wiener Space" Abstract | Video | Slides
September 15, 2020Bill Martin (Worcester Polytechnic Institute): "Schoenberg's Theorem and Association Schemes" Abstract | Video | Slides
September 8, 2020Hanmeng (Harmony) Zhan (York University): "DRACKNs and their applications in quantum information" Abstract | Video
September 1, 2020Chris Manon (University of Kentucky): "Spaces of Eigenvalues" Abstract | Video
August 25, 2020Frank Vallentin (Universität zu Köln): "Coloring the Voronoi tessellation of lattices" Abstract | Video
August 18, 2020David Gross (Universität zu Köln): "Representation theory of the Clifford group, with sundry applications" Abstract | Video
August 11, 2020Kasso Okoudjou (Tufts University): "The search for universal minimizers of p-frame potentials" Abstract | Video
August 4, 2020 Marcus Appleby (University of Sydney): "SICs and Number Theory" Abstract | Video
July 28, 2020Matt Fickus (Air Force Institute of Technology): "Mutually Unbiased Equiangular Tight Frames" Abstract | Slides | Video
July 21, 2020Vern Paulsen (University of Waterloo): "Entanglement Breaking Maps and Zauner's Conjecture" Abstract | Video
July 14, 2020Afonso S. Bandeira (ETH Zurich): "Hardness of refuting coloring in random graphs and quiet computational planting" Abstract | Video
July 7, 2020Bernhard Bodmann (University of Houston): "Polynomial embeddings as cheat codes for a real Game of Sloanes" Abstract | Video
June 30, 2020Pete Casazza (University of Missouri): "Two Distance Sets" Abstract | Video
June 23, 2020Alex Iosevich (University of Rochester): "On point configurations and frame theory" Abstract | Video | Slides
June 9, 2020Gene Kopp (University of Bristol): "SIC-POVM existence and the Stark conjectures" Abstract | Video
June 2, 2020Jameson Cahill (New Mexico State University): "Optimal Parseval Frames" Abstract | Video
May 26, 2020Chris Cox (Carnegie Mellon University / Iowa State University): "Nearly Orthogonal Vectors" Abstract | Video
May 19, 2020Hans Parshall (Ohio State University / Western Washington University): "Optimal Line Packings" Abstract | Video