Problems in Operator Theory
October 13-14, 2022, VU University, Amsterdam
in honor of the 67th birthday of André Ran
![[Andre Ran]](Andre.jpeg)
October 13
Room HG 06-A32 (morning)
10:30-10:40 Welcome (by Jan Bouwe van den Berg)
10:40-11:20 Harm Bart,
Logarithmic residues in Banach (sub)algebras generated by a single element.
11:20-11:40 Coffee/tea
11:40-12:20 Jan Wiegerinck,
Pluripolar hulls and fine holomorphy.
Lunch break (12:20-14:00)
Room WN-C147 (afternoon)
14:00-14:40 Hans Zwart,
Toeplitz operators and H∞-calculus.
14:40-15:20 Jan Brandts, A New Algorithm for Factorization of Completely Positive Matrices.
15:20-15:50 Coffee/tea
15:50-16:30 Bob Planque, Do bacteria do adaptive control?
16:30-17:10 Freek van Schagen,
Continuous time Leech problems for rational operator functions.
Dinner at (17:30), Restaurant NENI Amsterdam, Stadionplein 8 1076 CM, Amsterdam.
October 14
New room HG 08-A33 (morning and afternoon)
10:00-10:40 Arjan van der Schaft, Matrix differential operators and infinite-dimensional port-Hamiltonian systems.
10:40-11:10 Coffee/tea
11:10-11:50 Felix Schwenninger, Around Crouzeix's conjecture.
11:50-12:30 Jan van Schuppen, A geometric characterization of reachability
of a linear positive control system.
Lunch break (12:30-14:00)
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14:00-14:40 Derk Pik, Erdös Problems and High School Mathematics.
14:40-15:20 Teun Koetsier, The Position of Mathematics in the History of Technology.
15:20-15:50 Coffee/tea