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arxiv: 1905.09628 · v1 · pith:6K2UJTVGnew · submitted 2019-05-23 · 🧮 math.AG

Cubic forms having matrix factorizations by Hessian matrices

classification 🧮 math.AG
keywords locuscubicfactorizationsformshessianmatricesmatrixsingular
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Using a part of XJC-correspondence by Pirio and Russo, we classify cubic forms $f$ whose Hessian matrices induce matrix factorizations of themselves. When it defines a reduced hypersurface, it satisfies the "secant-singularity" correspondence, that is, it coincides with the secant locus of its singular locus. In particular, when $f$ is irreducible, its singular locus is either one of four Severi varieties.

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