题目：        Polynomials with only real zeros in combinatorics  

报告人：      王毅教授（大连理工大学）

时间地点：    2017.02.20  14:00pm  N210

摘要：        Polynomials with only real zeros arise often in combinatorics. Our interest in such polynomials was originally due to its implication about unimodality and log-concavity. In this talk we establish some sufficient conditions to the reality of zeros of polynomial sequences satisfying certain recurrence relations and then apply them to solve several open problems.