Carlini–Catalisano–Geramita conjecture on generic disjoint unions of linear spaces

Let XPnX\subset\mathbb{P}^n be a generic union of linear spaces whose components are pairwise non-intersecting. Recall that XX has good postulation if, for every degree d0d\geq 0, it imposes the expected number of conditions on hypersurfaces of degree dd; equivalently, one of h0(IX(d))h^0(\mathcal{I}_X(d)) and h1(IX(d))h^1(\mathcal{I}_X(d)) vanishes. Carlini–Catalisano–Geramita conjecture. The scheme XX has good postulation. This conjecture extends the known good-postulation results for generic points and generic unions of lines, including the Hartshorne–Hirschowitz theorem. Its resolution status is not specified in the supplied text.

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Primary source

Tahereh Aladpoosh and Maria Virginia Catalisano, “On the Hartshorne-Hirschowitz theorem”, arXiv:1708.07610 (2017).

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