Ozsvath-Szabo bordered algebras and subquotients of category O

Abstract

We show that Ozsváth-Szabó's bordered algebra used to efficiently compute knot Floer homology is a graded flat deformation of the regular block of a $\mathfrak{q}$-presentable quotient of parabolic category $\mathcal{O}$. We identify the endomorphism algebra of a minimal projective generator for this block with an explicit quotient of the Ozsváth-Szabó algebra using Sartori's diagrammatic formulation of the endomorphism algebra. Both of these algebras give rise to categorifications of tensor products of the vector representation $V^{\otimes n}$ for $U_q(\mathfrak{gl}(1|1))$. Our isomorphism allows us to transport a number of constructions between these two algebras, leading to a new (fully) diagrammatic reinterpretation of Sartori's algebra, new modules over Ozsváth-Szabó's algebra lifting various bases of $V^{\otimes n}$, and bimodules over Ozsváth-Szabó's algebra categorifying the action of the quantum group element $F$ and its dual on $V^{\otimes n}$.

arXiv comment36 pages, tikz diagrams

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• Strands algebras and Ozsváth-Szabó's Kauffman-states functor
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• Compatibility in Ozsvath-Szabo's bordered HFK via higher representations
• Strands algebras and the affine highest weight property for equivariant hypertoric categories