学术报告

报告人： 曾江 教授
Université de Lyon，Institut Camille Jordan, France
(法国里昂大学)

题 目： Combinatorics of Orthogonal Polynomials

地 点： 数学楼102报告厅
时 间： 2009年10月28日（星期三）
下午 3: 40—4: 40

After a brief presentation of the combinatorial theory of orthogonal polynomials developed by Foata, Flajolet and Viennot in the 1980's, we decribe various aspects of the Al-Salam-Chihara q-Laguerre polynomials. These include combinatorial descriptions of the polynomials, the moments, the orthogonality relation and a combinatorial interpretation of the linearization coefficients. It is remarkable that the corresponding moment sequence appears also in the recent work of Postnikov and Williams on enumeration of totally positive Grassmann cells.