Sigma-porosity and infinite games

Speaker(s)

Martin Dolezal

Affiliation

University of Warsaw

Date

March 29, 2017, 4:15 p.m.

Room

room 5050

Seminar

Topology and Set Theory Seminar

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We introduce an infinite game characterizing various types of sigma-porosity for Souslin sets in terms of winning strategies. We use the game to prove and reprove some new and older inscribing theorems for sigma-ideals of sigma-porous type in locally compact metric spaces. This is based on a joint work with D. Preiss and M. Zelený.

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