The Calabi–Yau criterion for the Maurer–Cartan algebra of an immersed Lagrangian

Let L\mathbb{L} be a compact, relatively spin, graded, oriented immersed Lagrangian of dimension nn in a symplectic manifold MM, and let AL\mathcal{A}_{\mathbb{L}} be its Maurer–Cartan algebra formed by degree-one elements. Let F(L,b)(L,b)\mathscr{F}^{(\mathbb{L},\boldsymbol{b})}(\mathbb{L},\boldsymbol{b}) denote the associated Lagrangian Floer complex. Calabi–Yau criterion. It is expected that the following are equivalent: (1) F(L,b)(L,b)\mathscr{F}^{(\mathbb{L},\boldsymbol{b})}(\mathbb{L},\boldsymbol{b}) provides a projective resolution of AL\mathcal{A}_{\mathbb{L}} as an AL\mathcal{A}_{\mathbb{L}}-bimodule; (2) AL\mathcal{A}_{\mathbb{L}} is an nn-Calabi–Yau algebra. This expectation is motivated by cyclic AA_\infty structures and existing results on Calabi–Yau algebras and categories. The source provides no resolution, so the assertion remains open.

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Primary source

Siu-Cheong Lau and Ju Tan, “Mirror construction of Hecke correspondence between Nakajima quiver varieties”, arXiv:2601.13555 (2026).

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