# Recent and upcoming talks by Francisco Guevara

## Francisco Guevarra Parra: An application of the the Ultra-Ellentuck theorem

Place: Fields Institute (Room 210) Date: April 7, 2017 (14:15-15:00) Speaker: Francisco Guevara Parra Title: An application of the the Ultra-Ellentuck theorem Abstract: We will use the Ultra-Ellentuck theorem to construct countable local $\pi$-bases in a given sequential-definable topology on $\omega$ that is $p^+$ (or $\alpha_4$ if we replace sequential by Frechet). continue reading…

## Francisco Guevara: Analytic group topologies

Place: Fields Institute (Room 210) Date: April 15th , 2016 (13:30-15:00) Speaker: Francisco Guevera Title: Analytic group topologies Abstract: We study the effective version Malykhin’s question about the metrizability of (countable) Frechet groups and its natural generalization to metrizability of (countable) sequential groups of higher sequential order. continue reading…