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Thomas Brüstle

Derived equivalences between skew-gentle algebras using orbifolds
Monday, 13 January, 2020 - 14:00
Résumé : 

Skew-gentle algebras are skew-group algebras of gentle algebras equipped with a certain $\mathbb{Z}_2$-action. Building on the bijective correspondence between gentle algebras and dissected surfaces, we obtain in this paper a bijection between skew-gentle algebras and certain dissected orbifolds that admit a double cover. 
We prove the compatibility of the $\mathbb{Z}_2$-action on the double cover with the skew-group algebra construction. This allows us to investigate the derived equivalence relation between skew-gentle algebras in geometric terms: We associate to each skew-gentle algebra a line field on the orbifold, and on its double cover, and interpret different kinds of derived equivalences of skew-gentle algebras in terms of diffeomorphisms respecting the homotopy class of the line fields associated to the algebras. 

Institution de l'orateur : 
Université de Sherbrooke
Thème de recherche : 
Algèbre et géométries
Salle : 
Salle 04
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