Special Functions and Orthogonal Polynomials

The workshop aims to offer a multi-faceted overview of contemporary research in orthogonal polynomials and special functions. A number of talks focus on the analysis of orthogonal polynomials themselves, such as asymptotic analysis of large degree behaviour. A second class of topics cover generalizations of orthogonal polynomials, such as polynomials of several variables, matrix-valued orthogonal polynomials or polynomials over curves and surfaces. Finally, polynomials as a tool in applications feature in talks on numerical simulations and other computational settings.

The study of orthogonal polynomials links to several branches of mathematics. In applications, they play a pivotal role in approximation methods and numerical simulations. As part of the
latter the workshop links to the other workshops “Approximation Theory and Computational Harmonic Analysis” and “Foundations of Numerical PDEs”, and to a lesser extent also with “Foundations of Data Science and Machine Learning” and “Information-based Complexity”.

Organizers

KU Leuven

Radboud Universiteit

Universidad de Granada

Speakers

Semi-plenary speakers

National University of Cordoba

University of Montreal

Invited speakers

Ankara University

University of Sevilla

City University of Hong Kong

Lancaster University

KU Leuven

University of South-Africa

Chuo University

University of Kent

University of Edinburg

Imperial College London

Chiara Paulsen

University of Wisconsin-Madison

Weierstrass Institute

University of Almeria

Johannes Kepler University

Universität Wien

Universidade de São Paulo

Carlos III University

KU Leuven

University of Granada

Thursday, 9.July

14:00-15:00 semi-plenary talk

Luc Vinet (Université De Montréal)

Leonard trios and biorthogonal rational functions

15:00-15:30

Wolter Groenevelt (Delft University Of Technology)

Multivariate biorthogonal rational functions

15:30-16:00

Guilherme Silva (Universidade De São Paulo)

Deformations of orthogonal polynomials, integrable PDEs and random point processes

16:00-16:30 Coffee Break

16:30-17:00

Veronika Pillwein (Johannes Kepler University)

On non-holonomic sequences and series

17:00-17:30

Michael Schlosser (University of Vienna)

Bilateral $q$-ultraspherical functions

Friday, 10.July

14:30-15:00

Kerstin Jordaan (University Of South Africa)

Interlacing zeros using an added point: Beyond orthogonal polynomial sequences

15:00-15:30

Benjamin Eichinger (Lancaster University)

New Universality classes associated to fractals

15:30-16:00

Chiara Paulsen (University Of Wisconsin-Madison)

On a density problem related to a theorem of Szeg\H{o}

16:00-16:30 Coffee Break

16:30-17:00

Ana Loureiro (University Of Kent)

Hidden figures in discrete Painlevé

17:30-18:30 semi-plenary talk

Pablo Roman (Universidad Nacional De Cordoba)

Matrix-valued orthogonal polynomials and differential operators

Saturday, 11.July

14:30-15:00

Niel Van Buggenhout (Universidad Carlos III De Madrid)

Numerical algorithms for Sobolev orthogonal polynomials

15:00-15:30

Cristina Rodriguez Perales (Universidad De Almería)

Zeros and Local Asymptotics of Nevai–Sobolev Polynomials

16:00-16:30 Coffee Break

17:00-17:30

Ioannis Papadopoulos (University Of Oxford)

A sparse hierarchical hp-finite element method on disks, annuli, and cylinders

17:30-18:00

Juan Antonio Villegas (Universidad de Granada)

Approximation on planar domains via interpolation-regresssion

18:00-18:30

Rabia Aktas Kamaran (Ankara University)

Fourier Transforms of Orthogonal Polynomials in Several Variables