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Seminários do IMPA

Colóquio Interdisciplinar

Título
Banach-Tarski paradox
Expositor
Andrzej Zuk

Universite Paris 7
Data
Quarta-feira, 7 de fevereiro de 2018, 15:30
Local
Auditorio 1
Resumo

In 1924 Banach and Tarski proved that a two dimensional sphere can be decomposed into finitely many pieces which one could reassemble by rotations to form two copies of the original sphere. We relate this to two fundamental notions in group theory: amenability (introduced by von Neumann) and property (T) (defined by Kazhdan).