Veronese secant-index conjecture

Let vd(n)(Pn)v_d^{(n)}(\mathbb{P}^n) be the degree-dd Veronese variety, let L(X)\mathfrak{L}(X) be its sequence of secant indices, and let RLG(X){\mathfrak{R}\mathfrak{L}}^G(X) and RL(X)\mathfrak{R}\mathfrak{L}(X) be the greedy and reducible secant-index sequences defined in the source. Veronese secant-index conjecture. For each n,d>1n,d>1, with X=vd(n)(Pn)X=v_d^{(n)}(\mathbb{P}^n),

RLG(X)=RL(X)=L(X).{\mathfrak{R}\mathfrak{L}}^G(X)={\mathfrak{R}\mathfrak{L}}(X)=\mathfrak{L}(X).

Equivalently, the maximal number of points in the finite reduced intersection of rr linearly independent degree-dd hypersurfaces in Pn\mathbb{P}^n is RLNdr1G(X){\mathfrak{R}\mathfrak{L}}^G_{N_d-r-1}(X). The conjecture is presented as a quasi-enumerative analogue of Bézout's theorem and is supported, conditionally, by the Eisenbud–Green–Harris conjecture.

Sources & referencesView supporting material

Primary source

Grayson Jorgenson, “Secant indices of projective varieties”, arXiv:2003.08481 (2020).

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