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Preprint in the OpenAI Math release

Deforming hypersymplectic four-manifolds to hyperkähler triples

OpenAI

Abstract

Every smooth normalized positive triple of closed two-forms on a closed connected oriented four-manifold admits a smooth deformation, with each cohomology class fixed, to a hyperkähler triple. This resolves Donaldson's hypersymplectic deformation conjecture.

open until 1 Jan 2028

est. 50% chance this result is independently verified by the end of 2027.

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