勷勤数学•专家报告
题 目:Coherency, purity and equations
报 告 人: 杨丹丹 教授 (邀请人:张霞)
西安电子科技大学
时 间: 4月10日 16:00-17:00
地 点:数科院西楼112
报告人简介:
杨丹丹,西安电子科技大学,教授,博导,获国家级人才奖励、陕西省杰出青年科学基金项目、华山学者特聘教授。2014年获得英国约克大学基础数学专业的博士学位,研究方向为代数学。主持国家自然科学基金项目(2项面上,1项青年),陕西省杰出青年科学基金项目等;获陕西省青年科技奖,入选陕西省高校青年杰出人才支持计划。研究成果发表在Adv. Math., Quart. J. Math., J. Algebra等期刊。应邀在全国群论会议、全国环与代数会议等作大会报告。
摘 要:
In this talk, we focus on the relationship between coherency of a monoid and purity properties of its acts. An underlying motivation comes from the following question for an algebra: when does the guaranteed solution of a finite consistent set of equations in one variable lift to the guarantee of solutions of finite consistent sets equations in any (finite) number of variables? This is a long-standing and intriguing problem, with a positive answer for some algebraic structures (e.g. groups and semigroups) but not fully understood for modules over rings or acts over monoids.
欢迎老师、同学们参加、交流!