Gabe Conant : On Invariant measures concentrated on countable structures part 2

Posted by Gabriel Conant , part of the Logic Seminar.

At

Oct. 2, 2012, 4 p.m.

In

SEO 427

Abstract

We continue the discussion of ``Invariant measures concentrated on countable structures'', by Ackerman-Freer-Patel . We show how to obtain a Borel L-structure witnessing the pithy $\Pi_2$ expansion of the Scott sentence of a countable L-structure with trivial group theoretic definable closure.