腾讯会议：983 968 734
邀请人：周效尧副教授
摘要：Mean dimension is an invariant of dynamical systems which can distinguish systems of infinite entropy. We introduce the notion of conditional mean dimension for a topological dynamical system relative to a factor system. With the help of this notion, an inequality is obtained to estimate the mean dimension of the extension system. Conditional mean dimension for a $G$-extension is computed.