报告题目1:New $q$-supercongruences from Rahman's and Gasper and Rahman's transformations
报告人:郭军伟教授,杭州师范大学
报告时间:2026年5月15日(周五)10:00-12:00
报告地点:20-308
报告摘要:We give two $q$-supercongruences. One is modulo the fifth power of a cyclotomic polynomial,and the other one is a new $q$-analogue of the supercongruence:forodd primes $p$,$\sum_{k=0}^{p-1} \frac{3k+1}{16^k}{2k\choose k}^3 \equiv p\pmod{p^4},$which was first proved by Guillera and Zudilin in the modulus $p^3$ case. Our proof employs Rahman's and Gasper and Rahman's quadratic transformations,the creative microscoping method devised by the first author in joint work with Zudilin, along with the Chinese remainder theorem for polynomials.
报告人简介:郭军伟教授,本科毕业于南开大学数学系,后师从陈永川教授从事组合数学研究,并于2004年获理学博士学位。随后赴里昂一大,师从曾江教授开展一年半博士后研究,并在薛定谔国际数学物理研究所短期访问。2006年作为引进副教授在华东师范大学数学系任教,2011年破格升为教授、2012年任博士生导师。目前是杭州师范大学教授,博士生导师。郭军伟教授的研究领域主要涉及计数组合学、q-级数、同余式等三个方面,在SCI期刊上共发表论文170多篇。其中一篇发表在Advances in Mathematics上。先后主持并完成了国家自然科学青年基金1项、面上基金2项;江苏省自然科学基金面上项目1项;上海市科委青年科技启明星计划1项。
报告题目2:On the Gamma-Coefficients of q-Eulerian Polynomials
报告人:曾江教授,温州大学
报告时间:2026年5月15日(周五)15:00-17:00
报告地点:20-308
报告摘要:The Eulerian polynomials are fundamental objects in enumerative combinatorics, as they encode the distribution of ascents and descents in permutations. Over the years, many refinements and generalizations of these polynomials have been introduced.Gamma-positivity is an important property of polynomials with symmetric coefficients, and it implies unimodality in a natural way. In this talk, I will survey several recent results on gamma-positivity for various q-Eulerian polynomials, with an emphasis on the combinatorial theory of continued fractions and its applications.
报告人简介:曾江,温州大学教授,法国里昂第一大学荣休教授,博士生导师。1988年获University of Strasbourg数学博士学位,1989年至1990年为Institute for Advanced Study成员。1990年至2025年,先后任教于University of Strasbourg(副教授)和Claude Bernard University Lyon 1(教授)。2024年入选国家级领军人才。长期从事计数组合学、特殊函数与正交多项式理论的研究,在连分式理论、排列统计以及q-级数等方向取得了系列研究成果。
报告题目3:q-Supercongruences motivated by Carlitz's formula
报告人:刘纪彩教授,温州大学
报告时间:2026年5月16日(周六)15:30-17:30
报告地点:20-308
报告摘要:Various $q$-congruences related to Carlitz's formula have been recently studied by many authors. We establish a unified form of these $q$-congruences, which includes all of the known $q$-congruences motivated by Carlitz's formula as special cases. Apart from Carlitz's formula and a $q$-analogue of Morley's congruence, important ingredients in our proof of the unified form include a $q$-analogue of Granville's congruence and a recurrence formula for a summation. As an application, we prove a $q$-congruence conjectured by Tauraso.
报告人简介:刘纪彩,温州大学教授,瓯江特聘教授。主要从事组合数学与数论研究,迄今在《Proc. Amer. Math. Soc.》、《J. Algebraic Combin.》、《Adv. in Appl. Math.》、《J. Number Theory》等期刊上发表学术论文60余篇,主持国家自然科学基金青年项目与面上项目各一项。
邀请人:离散数学研究所
