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A braid group action on an A∞-category for zigzag algebras
Book chapter

A braid group action on an A∞-category for zigzag algebras

Benjamin Cooper, You Qi and Joshua Sussan
From Representation Theory to Mathematical Physics and Back, pp.119-144
Contemporary Mathematics, v. 817, American Mathematical Society
2025
DOI: 10.1090/conm/817/16323

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Abstract

We construct differential graded enhancements of the zigzag algebras which were used by Khovanov, Seidel and Thomas to produce categorical braid group actions. These enhancements are related to p-differential graded structures by a version of Koszul duality. We prove that the minimal model A∞-structure on the zigzag algebras is not formal. We construct a braid group action in this setting and suggest a symplectic interpretation

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