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Martina Pfeifer

H. Becker: Choosing a weakly Cauchy subsequence

Thursday, 24.11.2011 14:15 im Raum N 2

Mathematik und Informatik

Consider a separable Banach space. Given a sequence in the space which has a weakly Cauchy subsequence, how difficult is it to select a weakly Cauchy subsequence? Is it always possible to do the selection in a Borel way? In a universally measurable way? The answer depends on the Banach space, and in the measurable case also depends on the model of set theory that the Banach space lives in.



Angelegt am 16.11.2011 von Martina Pfeifer
Geändert am 17.11.2011 von Martina Pfeifer
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