Seminars & Colloquia Calendar
Noncommutative generalized Catalan numbers and their generating functions
Vladimir Retakh, Rutgers University
Date & time: Thursday, 02 March 2023 at 5:00PM - 6:00PM
Abstract: In 1999 M. Aigner defined Catalan-like numbers as North-West entries of powers of semi-infinite three-diagonal matrices. In this talk I will generalize this construction to various matrices over noncommutative rings and discuss properties of the corresponding generating functions. I will also consider orthogonal polynomials associated with these "numbers". Most of the results are new even in the commutative case. Joint work with A. Berenstein and M. Gekhtman.
password: The 20th Catalan number, alias (40)!/(20!*21!), alias 6564120420 ]