报告人：张国华 复旦大学

时间：6月27日上午10：30-11:30

地点：管研楼1518

摘要: Recall that a countable discrete group G is amenable if there exists an asymptotically invariant sequence of finite non-empty subsets. We will prove that each infinite countable amenable group G admits a tiling with finitely many almost invariant shapes and with lower complexity. As an application, we will provide a free action of G with zero entropy. The talk is based on a joint work with T. Downarowicz and D. Huczek (both from Poland).

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