Iván Sadofschi Costa

collaborators

2 papers

math.AT2025

Group actions on contractible $2$ -complexes II

Kevin Ivan Piterman, IvÃ¡n Sadofschi Costa

In this second part we prove that, if $G$ is one of the groups $PSL_{2} (q)$ with $q > 5$ and $q \equiv 5 (mod 24)$ or $q \equiv 13 (mod 24)$ , then the fundamental group of eve…

math.AT2025

Group actions on contractible $2$ -complexes I

IvÃ¡n Sadofschi Costa

In this series of two articles, we prove that every action of a finite group $G$ on a finite and contractible $2$ -complex has a fixed point. The proof goes by constructing a nontri…

Group actions on contractible 2-complexes II

Group actions on contractible 2-complexes I

Group actions on contractible $2$ -complexes II

Group actions on contractible $2$ -complexes I