Equivariant smoothing conjecture for antisymplectic cusp singularities

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Let (p∈X)(p\in X) be a cusp singularity equipped with an antisymplectic involution ι\iota. Let DD denote the dual cycle of the cusp. An equivariant smoothing conjecture. Then p∈Xp\in X admits an equivariant smoothing if and only if DD sits as an anticanonical divisor on a smooth rational surface admitting an antisymplectic involution extending the involution induced on DD by ι\iota. This is proposed as an equivariant analogue of Looijenga's smoothability theorem; the necessary and sufficient condition is not proved in general.

References

Primary source

Angelica Simonetti, “Z/2Z-Equivariant smoothings of cusp singularities”, arXiv:2201.02871 (2022).

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