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Compact Lagrangians implied by noncompact mirror equivalence

Ascertain whether a homological mirror symmetry equivalence Fuk(X) = Coh(Y) for a Weinstein manifold X (with Y singular or noncompact) implies the existence of any compact Lagrangian submanifolds in X or in a compactification \overline{X}; specifically, determine if compact Lagrangian objects in the Fukaya category arise from or are guaranteed by this noncompact mirror equivalence.

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Background

The paper discusses homological mirror symmetry in the Weinstein (noncompact) setting, where one has equivalences Fuk(X) = Coh(Y) with Y necessarily singular or noncompact. In many cases of interest, smoothing Y is expected to correspond to compactifying X.

However, the author emphasizes that the existence of compact Lagrangians does not automatically follow from such a noncompact mirror equivalence, highlighting a gap between the noncompact equivalence and compact objects in the Fukaya category.

References

More forcefully: it is not known to follow from noncompact mirror that $X$ or $\overline{X}$ has any compact Lagrangians at all!

noncompact mirror:

$\Fuk(X) = \Coh(Y) $

Toric mirror monodromies and Lagrangian spheres (2409.08261 - Shende, 12 Sep 2024) in Introduction, following Equation (1) 'noncompact mirror'