报告一:On preserving norms of means in commutative C*-algebra.
报告人:李磊副教授(南开大学金沙集团wwW3354CC)
报告摘要:I will introduce the maps preserving the norm of arithmetic, geometric or harmonic mean in positive cones of C_0(X), when X is a locally compact space. These maps can be written as composition operators. I will also give some counterexamples.
报告时间:2020年10月30日11:00-11:40
报告地点:数学楼305
报告二:Maps preserving harmonic means in AW*-algebras
报告人:李磊副教授(南开大学金沙集团wwW3354CC)
报告摘要:For the bijections preserving harmonic means in the positive definie cones on AW*-algebras, I will show that it can be extended to be a Jordan *-isomorphism.
报告时间:2020年10月30日15:00-15:40
报告地点:数学楼305
报告人简介:李磊,现为南开大学金沙集团wwW3354CC副教授,曾任台湾中山大学博士后研究员,英国玛丽女王大学访问学者。主要研究方向为泛函分析,已在Israel J. Math., Studia Math., Proc. Amer. Math. Soc., Linear Algebra Appl., Quart. J. Math., Canad. Math. Bull., Anal. Funct. Anal.等期刊发表SCI论文20多篇。