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Relative Fukaya Categories via Gentle Algebras
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abstract
Relative Fukaya categories are hard to construct. In this paper, we provide a very explicit construction in the case of punctured surfaces. The starting point is the gentle algebra $ \operatorname{Gtl} Q $ associated with a punctured surface $ Q $. Our model for the relative Fukaya category is a deformation $ \operatorname{Gtl}_q Q $ which has one formal deformation parameter per puncture. We verify that $ \operatorname{Gtl}_q Q $ is a model for the relative Fukaya category by computing a large part of the $ A_\infty $-structure on the derived category $ \operatorname{H}\operatorname{Tw}\operatorname{Gtl}_q Q $. The core method is the deformed Kadeishvili theorem from arXiv:2308.08026. The paper's technical contributions include (1) a construction for removing curvature from band objects, (2) a method for analyzing Kadeishvili trees, (3) a matching between deformed Kadeishvili trees and relative Fukaya disks. This paper is the second in a series of three, whose aim it is to deform mirror symmetry for punctured surfaces.
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Cited by 1 Pith paper
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