报告人：汪湜（上海科技大学)

报告时间：2025年5月26日（星期一）10:30-11:30

报告地点：东三十二楼216室

报告摘要：Given a discrete subgroup H in a higher rank non-compact simple real Lie group G. We show that either H is a lattice in G, or the homological dimension of H is bounded above by (n-1/8r), where n is the dimension of the symmetric space G/K and r is the real rank of G. The proof uses a geometric gradient flow motivated by the Patterson-Sullivan theory and the barycenter map of Besson-Courtois-Gallot. This is joint work with Chris Connell and Ben McReynolds.

邀请人：张庆