Evans–Lekili conjecture on small resolutions of compound Du Val singularities

Let PXP \in X be a compound Du Val singularity, let \Uv\Uv be its Milnor fiber, and let \SHi(\Uv)\SH^i(\Uv) denote its symplectic cohomology in degree ii. Evans–Lekili conjecture. The singularity PP admits a small resolution if and only if dim\SHi(\Uv)\dim \SH^i(\Uv) is constant for every negative cohomological degree. If this holds, that common dimension equals the number of irreducible components of the exceptional locus of a small resolution. The conjecture is proposed in the cited work, and no resolution status is supplied here.

Sources & referencesView supporting material

Primary source

Yanki Lekili and Kazushi Ueda, “Rabinowitz Fukaya categories as cluster categories”, arXiv:2406.15915 (2026).

Additional references

2 papers in this index state this conjecture (2024). The statement above is taken from the most recent of them; the others are arXiv:2404.17301.

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