Analysis and Operator Theory Seminar - Maksym Derevyagin

October 12, 2020
Thursday, October 22, 2020 - 11:00am to 11:55am
Zoom
Maksym Derevyagin

Title: On some properties of the entries of a refinement equation and of their generalizations

Speaker: Maksym Derevyagin - University of Connecticut 

Abstract: The entries of the matrix coefficients of the refinement equation corresponding to the multiresolution analysis of Alpert are actually connection coefficients, which turns out to be related to a wide range of problems. We’ll start by discussing some history and then presenting a generalization of a discrete wave equation that is satisfied by connection coefficients. Then, we’ll consider some simulations of the behavior of the entries, which are in fact functions of two discrete variables and they can be expressed in terms of the Legendre polynomials. Next, we’ll generalize these functions to the case of the ultraspherical polynomials and show that these new functions obey two generalized eigenvalue problems in each of the two discrete variables, which constitute a generalized bispectral problem. At the end, we’ll make some connections to spectral transformations. 

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