Activity: Participating in or organising an event types › Invited talk

Description

UEA pure maths research seminar talk: The Specker phenomenon, evasion, and large cardinals

Abstract: The evasion number e is an uncountable cardinal which, if the continuum hypothesis fails, may be strictly less than the cardinality of the reals. It was introduced by Blass in connection with Specker's theorem, which states that any homomorphism to the group Z from the countable product of copies of Z must be trivial on all but finitely many basis vectors. After surveying this background, I will move to the analogue of e for large cardinals, discussing my recent work with Joerg Brendle on which relations from the basic case generalise.