Codes and Expansions (CodEx) Seminar
A pan-university, remote seminar on the theory and applications of harmonic analysis, combinatorics, and algebra.
When:
Tuesdays at 10 a.m. PDT / 1 p.m. EDT / 5 p.m. UTC / 7 p.m. CEST
Where:
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:
| July 20, 2021 | CodEx canceled. |
|---|---|
| July 27, 2021 | Nate Strawn (Georgetown University): "3D Filament Plots from Optimally Smooth 2D Andrew's Plots" Abstract |
| August 3, 2021 | Matt Herman (Fourier Genetics) |
| August 10, 2021 | ‪Romanos Diogenes-Malikiosis (Aristotle University of Thessaloniki) |
| August 17, 2021 | CodEx canceled due to the SIAM Conference on Applied Algebraic Geometry (AG21) |
| August 24, 2021 | Longxiu Huang (University of California Los Angeles) |
| August 31, 2021 | Mauro Maggioni (Johns Hopkins University) |
| September 7, 2021 | Armenak Petrosyan (Georgia Institute of Technology) |
| September 14, 2021 | Tom Needham (Florida State University) |
| September 21, 2021 | Naoki Saito (University of California Davis) |
| September 28, 2021 | Boumediene Et-Taoui (Université de Haute Alsace): "A survey on complex conference matrices" |
| October 5, 2021 | X.Y. Han (Cornell University) |
| October 12, 2021 | |
| October 19, 2021 | |
| October 26, 2021 | Markus Grassl (International Centre for Theory of Quantum Technologies, University of Gdansk) |
| November 2, 2021 | Alexander Powell (Vanderbilt University) |
| November 9, 2021 | |
| November 16, 2021 | |
| November 23, 2021 | CodEx canceled due to the U.S. holiday week. |
| November 30, 2021 | Lutz Warnke (Georgia Institute of Technology) |
| December 7, 2021 | Rima Alaifari (ETH Zürich) |
| December 14, 2021 | Gene Kopp (University of Bristol) |
| December 21-January 11, 2021 | No CodEx: (Northern Hemisphere) Winter Break. |
Past talks:
| July 13, 2021 | Davi Castro-Silva (Universität zu Köln): "Geometrical sets with forbidden configurations" Abstract | Video | Slides |
|---|---|
| July 6, 2021 | Nathan Lindzey (University of Colorado Boulder): "Discrete Harmonic Analysis on Matchings" Abstract | Video |
| June 29, 2021 | Xuemei Chen (University of North Carolina Wilmington): "Frame optimization with projective Riesz kernel" Abstract | Video |
| June 22, 2021 | Nadiia Derevianko (Universität Göttingen): "Estimation of Signal Parameters by Iterative Rational Approximation" Abstract | Video |
| June 15, 2021 | Michael Perlmutter (University of California Los Angeles): "Convolutional Networks on (Directed) Graphs via the Graph Fourier Transform" Abstract | Video | Slides |
| June 8, 2021 | Mikhail Ganzhinov (Aalto University): "Infinite families of optimal biangular line packings" Abstract | Video |
| June 1, 2021 | Joseph Cummings (University of Kentucky): "Phylogenetic Networks" Abstract | Video |
| May 25, 2021 | Elina Robeva (University of British Columbia): "Orthogonal and Incoherent Tensor decomposition" Abstract | Video |
| May 18, 2021 | Radu Balan (University of Maryland):"Embeddings of Metric Spaces induced by Permutation Groups" Abstract | Video |
| May 11, 2021 | Steve Butler (Iowa State University): "Hadamard diagonalizable graphs of small order" Abstract | Video |
| May 4, 2021 | Cynthia Vinzant (North Carolina State University): "The geometry of spectrahedra" Abstract | Video | Slides |
| April 27, 2021 | Azita Mayeli (City University of New York, the Graduate Center): "Exponential completeness and φ-approximate orthogonality on the unit ball" Abstract |
| April 20, 2021 | Marcin Bownik (University of Oregon): "Multiplication-invariant operators and the classification of abelian group frames" Abstract | Video | Slides |
| April 13, 2021 | Gary Greaves (Nanyang Technological University): "Real equiangular line systems in low dimensions" Abstract | Video | Slides |
| April 6, 2021 | Robert Calderbank (Duke University): "Coherent Noise" Abstract | |
| March 30, 2021 | Vignon Oussa (Bridgewater State University): "Why are topics such as differential geometry and representation theory useful to frame theory?" Abstract | Video |
| March 23, 2021 | Zilin Jiang (Arizona State University): "Spherical two-distance sets and spectral theory of signed graphs" Abstract " Video |
| March 16, 2021 | Daniel Freeman (St Louis University): "Discretizing L_p norms" Abstract | Video |
| March 9, 2021 | Keaton Hamm (The University of Texas at Arlington): "Column Selection and You" Abstract | Video |
| March 2, 2021 | Ram Zamir (Tel Aviv University): "Asymptotic Frame Theory for Analog Coding" Abstract | Video | Slides |
| February 23, 2021 | Joshua A. Grochow (University of Colorado Boulder): "Codes and Expansions in Algorithms for Matrix Multiplication" Abstract | Video | Slides |
| February 16, 2021 | Karin Schnass (Universität Innsbruck): "Random submatrices with non-uniformly distributed supports" Abstract | Video |
| February 9, 2021 | Eugenio Hernández (Universidad Autónoma de Madrid): "Spaces invariant under unitary representations and the bracket" Abstract | Slides | Video |
| February 2, 2021 | Emily J. King (Colorado State University): "A Potpourri of Projective 2-Designs" Abstract | Video | Slides |
| January 26, 2021 | Steven Flammia (AWS Center for Quantum Computing): "Ghosts, Necromancy, and Zauner's Conjecture" Abstract | Video |
| December 8, 2020 | Chris Heil (Georgia Tech): "Frames, Erasures, and Excess in Infinite Dimensions" Abstract | Video | Slides |
| December 1, 2020 | Hartmut Führ (RWTH Aachen): "Frames of translates and the bandwidth intuition" Abstract | Video | Slides |
| November 17, 2020 | Philipp Petersen (Universität Wien): "Functions with structured singularities" Abstract | Video |
| November 10, 2020 | Alex Cloninger (University of California at San Diego): "Fast Statistical and Geometric Distances Between Families of Distributions" Abstract | Video |
| November 3, 2020 | Gerlind Plonka-Hoch (Universität Göttingen): "Optimal Rank-1 Hankel Approximation of Matrices" Abstract | Video | Slides |
| October 27, 2020 | Akram Aldroubi (Vanderbilt University): "Transport transforms for data analysis and machine learning" Abstract | Video |
| October 20, 2020 | Dustin G. Mixon (The Ohio State University): "Symmetry and optimality in codes" Abstract | Video |
| October 13, 2020 | John J. Benedetto (University of Maryland): "Spectral super-resolution and unique extensions for complex measures" Abstract | Video |
| October 6, 2020 | Shahaf Nitzan (Georgia Tech): "A few remarks on 'good' exponential Riesz bases" Abstract |
| September 29, 2020 | Boris Bukh (Carnegie Mellon University): "Ranks of matrices with few distinct entries" Abstract | Video |
| September 22, 2020 | Eric Weber (Iowa State University): "Conjugate Phase Retrieval in Paley-Wiener Space" Abstract | Video | Slides |
| September 15, 2020 | Bill Martin (Worcester Polytechnic Institute): "Schoenberg's Theorem and Association Schemes" Abstract | Video | Slides |
| September 8, 2020 | Hanmeng (Harmony) Zhan (York University): "DRACKNs and their applications in quantum information" Abstract | Video |
| September 1, 2020 | Chris Manon (University of Kentucky): "Spaces of Eigenvalues" Abstract | Video |
| August 25, 2020 | Frank Vallentin (Universität zu Köln): "Coloring the Voronoi tessellation of lattices" Abstract | Video |
| August 18, 2020 | David Gross (Universität zu Köln): "Representation theory of the Clifford group, with sundry applications" Abstract | Video |
| August 11, 2020 | Kasso 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, 2020 | Matt Fickus (Air Force Institute of Technology): "Mutually Unbiased Equiangular Tight Frames" Abstract | Slides | Video |
| July 21, 2020 | Vern Paulsen (University of Waterloo): "Entanglement Breaking Maps and Zauner's Conjecture" Abstract | Video |
| July 14, 2020 | Afonso S. Bandeira (ETH Zurich): "Hardness of refuting coloring in random graphs and quiet computational planting" Abstract | Video |
| July 7, 2020 | Bernhard Bodmann (University of Houston): "Polynomial embeddings as cheat codes for a real Game of Sloanes" Abstract | Video |
| June 30, 2020 | Pete Casazza (University of Missouri): "Two Distance Sets" Abstract | Video |
| June 23, 2020 | Alex Iosevich (University of Rochester): "On point configurations and frame theory" Abstract | Video | Slides |
| June 9, 2020 | Gene Kopp (University of Bristol): "SIC-POVM existence and the Stark conjectures" Abstract | Video |
| June 2, 2020 | Jameson Cahill (New Mexico State University): "Optimal Parseval Frames" Abstract | Video |
| May 26, 2020 | Chris Cox (Carnegie Mellon University / Iowa State University): "Nearly Orthogonal Vectors" Abstract | Video |
| May 19, 2020 | Hans Parshall (Ohio State University / Western Washington University): "Optimal Line Packings" Abstract | Video |