The conjecture on unobstructed contraction algebras and smooth centres
The conjecture on unobstructed contraction algebras and smooth centres
Let be a contraction algebra and let . Denote by the moduli space of associative unital algebras of dimension , and by the point corresponding to .
Unobstructedness and smooth-centre conjecture. The point is smooth in , equivalently, is unobstructed; moreover, the dimension of the centre is constant in an open neighbourhood of , and the associated map
is smooth.
This conjecture proposes that contraction algebras have especially regular deformation theory: they are unobstructed, and their centres vary smoothly in families. It is motivated by the preceding result that contraction algebras of types and deform to a single semisimple algebra, but the supplied text gives no resolution of the conjecture.
Sources & referencesView supporting material
Primary source
Joachim Jelisiejew and Agata Smoktunowicz, “On a conjecture by Michael Wemyss regarding the calculation of GV invariants”, arXiv:2602.05919 (2026).
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