»ã±¨±êÌâ (Title)£º¸´Ë«ÇúµÈ¾àȺÖеijË×Ó¸ÕÐÔ

»ã±¨ÈË (Speaker)£º ÑîÊÀº£ ½ÌÊÚ£¨ÉϺ£²Æ¾­´óѧ£©

»ã±¨¹¦·ò (Time)£º2021Äê11ÔÂ17ÈÕ(ÖÜÈý) 9:00

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»ã±¨ÌáÒª£ºIn this talk, we will first give a brief introduction of the boundary rigidity problem in the hyperbolic isometric group. Then we discuss the relations between the multiplier of an isometry and its corresponding matrix trace and show that a homomorphism in PU(2,1) which stretches each multiplier by a uniform constant is in fact multiplier-preserving. At last some problems related to ergordic rigidity are given. This is a joint work with Wang Liudeng.