杰出学者讲座
题目:Interpolation problems in subdiagonal algebras
报告人:吉国兴(陕西师范大学)
时间:6月6日(周五),15:30-16:30
地点:格物楼315
报告人简介:吉国兴,陕西师范大学数学与统计学院教授,主要从事算子理论与算子代数研究,先后在J. Funct. Anal., J. Operator Theory, Proc. Amer. Math. Soc.,中国科学(数学)等国内外数学杂志发表学术论文,主持完成1项教育部优秀青年教师资助计划、1项教育部博士点专项基金和6项国家自然科学基金面上项目。主持完成的课题《非自伴算子代数及相关问题研究》获2005年陕西省科学技术二等奖,主持完成的教学成果《高师院校数学与应用数学专业人才培养模式的改革与实践》获2015年陕西省高等教育教学成果二等奖,2018年获宝钢教育奖。
摘要:
In this talk, we will discuss interpolation problems in subdiagonal algebras. Let A be a subdiagonal algebra in a -finite von Neumann algebra M. We mainly consider the interpolation problem in A with the universal factorization property. We determine when a finitely generated left ideal in A is trivial. By constructing a periodic flow on M according to a type 1 subdiagonal algebra, we show that type 1 subdiagonal algebras coincide with analytic operator algebras associated with periodic flows in von Neumann algebras. This enables us to present a form decomposition of a type 1 subdiagonal algebra. As an application, we deduce a noncommutative operator-theoretic variant of the Corona theorem for type 1 subdiagonal algebras.