RIT on Applied Harmonic Analysis Archives for Fall 2019 to Spring 2020

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Organization Meeting

When: Mon, August 27, 2018 - 12:00pm
Where: Kirwan Hall (MATH) 1310
Speaker: Radu Balan (UMD) -

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Algebraic Varieties of Low-Rank Symmetric Matrices

When: Mon, September 10, 2018 - 12:00pm
Where: Kirwan Hall (MTH) 1310
Speaker: Chris Dock (UMD) -

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Tangent Structures to the Algebraic Variety of Low-Rank Symmetric Matrices

When: Mon, September 17, 2018 - 12:00pm
Where: Kirwan Hall 1310
Speaker: Chris Dock (UMD) -

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Riemann Geometry of Low-Rank Symmetric Matrices

When: Mon, September 24, 2018 - 12:00pm
Where: Kirwan Hall (MATH) 1310
Speaker: Chris Dock (UMD) -

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Introduction to Bayesian belief networks and graphical models

When: Mon, October 1, 2018 - 12:00pm
Where: Kirwan Hall (MATH) 1310
Speaker: David Bekkerman (UMD) -

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Inference using Belief Propagation Networks

When: Mon, October 8, 2018 - 12:00pm
Where: Kirwan Hall (MATH) 1310
Speaker: David Bekkerman (University of Maryland) -

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Local convergence of an alternating minimization algorithm for learning sparse overcomplete dictionaries

When: Mon, October 15, 2018 - 12:00pm
Where: Kirwan Hall 1310
Speaker: Addison Bohannon (UMD) -

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Local convergence of an alternating minimization algorithm for learning sparse overcomplete dictionaries (2)

When: Mon, October 22, 2018 - 12:00pm
Where: Kirwan Hall 1310
Speaker: Addison Bohannon (UMD) -

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Local convergence of an alternating minimization algorithm for learning sparse overcomplete dictionaries (3)

When: Mon, October 29, 2018 - 12:00pm
Where: Kirwan Hall 1310
Speaker: Addison Bohannon (UMD) -

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The Free Energy Principle for Biological Systems

When: Mon, November 5, 2018 - 12:00pm
Where: Kirwan Hall (MATH) 1310
Speaker: Jesse Milzman (UMD) -
Abstract: Discussion of this paper: https://www.mdpi.com/1099-4300/14/11/2100/htm

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Local convergence of an alternating minimization algorithm for learning sparse overcomplete dictionaries (4)

When: Mon, November 12, 2018 - 12:00pm
Where: Kirwan 1310
Speaker: Addison Bohannon (UMD) -

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Smallest and largest singular values of random matrices with independent rows

When: Mon, November 19, 2018 - 12:00pm
Where: Kirwan 1310
Speaker: Addison Bohannon (UMD) -

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Permutation Invariant Features

When: Mon, November 26, 2018 - 11:30am
Where: CSIC (CSCAMM) 4122
Speaker: Radu Balan (UMD) -
Abstract: Note special time and place (in CSCAMM seminar room).

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Permutation Invariant Representations of Two-Column Matrices

When: Mon, December 3, 2018 - 12:00pm
Where: Kirwan Hall 1310
Speaker: Dong Dong (UMD) -

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Organizational Meeting

When: Mon, February 4, 2019 - 12:00pm
Where: Kirwan Hall 1310
Speaker: Radu Balan (UMD) -

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Bimodal Wilson systems in L^2(R)

When: Mon, February 11, 2019 - 12:00pm
Where: Kirwan Hall 1310
Speaker: Divyang Bhimani (UMD) -
Abstract: Given a window $\phi \in L^2(\R),$ and lattice parameters $\alpha, \beta>0,$ we introduce a bimodal Wilson system $\mathcal{W}(\phi, \alpha, \beta)$ consisting of linear combinations of at most two elements from an associated Gabor $\mathcal{G}(\phi, \alpha, \beta)$. For a class of window functions $\phi,$ we show that the Gabor system $\mathcal{G}(\phi, \alpha, \beta)$ is a tight frame of redundancy $\beta^{-1}$ if and only if the Wilson system $\mathcal{W}(\phi, \alpha, \beta)$ is Parseval system for $L^2(\mathbb R).$ Examples of smooth rapidly decaying generators $\phi$ are constructed. In addition, when $3\leq \beta^{-1}\in \N$, we prove that it is impossible to renormalize the elements of the constructed Parseval Wilson frame so as to get a well-localized orthonormal basis for $L^2(\mathbb R)$. This is a joint work Kasso A. Okoudjou. The preprint is available at arXiv:1812.08020

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Discriminative representations for an algebra of linear operators defined via spectral calculus

When: Mon, February 25, 2019 - 1:00pm
Where: Kirwan Hall (MATH) 1310
Speaker: Addison Bohannon (UMD) -

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Discriminative representations for an algebra of linear operators defined via spectral calculus (2)

When: Mon, March 4, 2019 - 1:00pm
Where: Kirwan Hall 1310
Speaker: Addison Bohannon (UMD) -

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Robustness of phase retrievable matrix frames

When: Mon, April 8, 2019 - 1:00pm
Where: Kirwan 1310
Speaker: Chris Dock (UMD) -

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Exponential bases for partitions of intervals

When: Mon, April 15, 2019 - 1:00pm
Where: Kirwan Hall 1310
Speaker: Goetz Pfander (Katholische Universitat Eichstatt-Ingolstadt) -

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Trace class operator sparse decomposition

When: Mon, April 29, 2019 - 1:00pm
Where: Kirwan 1310
Speaker: Michael Rawson (UMD) -

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Robustness of phase retrievable matrix frames (2)

When: Mon, May 6, 2019 - 1:00pm
Where: Kirwan 1310
Speaker: Chris Dock (UMD) -

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Fourier-Wavelet Regularized deconvolution (ForWaRD) in multi-antenna setup

When: Mon, May 13, 2019 - 1:00pm
Where: Kirwan 1310
Speaker: Debdeep Bhattacharya (The George Washington University) - https://blogs.gwu.edu/debdeepbh

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