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Powers of phantom ideals

题目: Powers of phantom ideals
报告人: 扶先辉教授  (东北师范大学)         

摘要:In this talk, we introduce Mono-epi exact structure on the morphisms of an exact category. This exact structure is used to prove new versions of Salce's Lemma, Christensen's Lemma and Wakamatsu's Lemma.  As an application, we show that for a finite group G, the order ofG is a proper upper bound for the phantom number of G. This answers a question of Benson and Gnacadja.

时间:

2016年1月20日(周三)14:00-15:00

2016年1月21日(周四)15:30-16:30

地点:首都师范大学北二区教学楼516教室

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