学术报告报告主题: Balls in Flag Varieties
报 告 人：谢锴涛（香港大学）
报告时间：2024年8月28日（星期三）下午15:00-16:00
报告地点：腾讯会议：776 869 013
邀 请 人: 孙浩副教授、潘会平副教授
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数学学院
2024年 8月26日
报告摘要：
Lusztig’s total positivity was applied in higher Teichmuller theory by Fock-Goncharov. Recently such application inspired Guichard-Wienhard to generalize the total positivity and introduce the theta positivity. The totally nonnegative part of flag varieties was shown by Galashin-Karp-Lam and Bao-He to be a regular CW complex. In particular, the closure of each cell is a closed ball. In this talk, I will discuss the analogs for the theta nonnegative part of Lagrangian Grassmannian.