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Friday, February 8, 2019

**Abstract:** This will be the introductory talk of the series on the paper in the title [arXiv link], which deals with the classification of some natural classes of non-Archimedean groups (= closed subgroups of S_{∞}) up to topological group isomorphism. It gives a general criterion for a class of non-Archimedean groups to show that the topological group isomorphism on it is Borel-classifiable by countable structures. This criterion is satisfied by the classes of profinite groups, locally compact non-Archimedean groups, and oligomorphic groups.

Friday, February 15, 2019

Friday, February 22, 2019

Friday, March 1, 2019

Friday, March 8, 2019

Friday, March 15, 2019

Friday, April 5, 2019

Friday, April 19, 2019