Conca–De Negri–Gorla local cohomology conjecture for Cartwright–Sturmfels ideals

Let A=K[x1,,xn]A=\mathbb{K}[x_1,\dots,x_n] be a polynomial ring over a field K\mathbb{K}, let IAI\subseteq A be a Zm\mathbb{Z}^m-graded Cartwright–Sturmfels ideal, and let gin(I)\operatorname{gin}(I) be its Zm\mathbb{Z}^m-graded generic initial ideal, where mnm\leq n. For rNr\in\mathbb{N} and aZma\in\mathbb{Z}^m, write Hmr(A/I)aH^r_{\mathfrak m}(A/I)_a for the multigraded component of the local cohomology module supported at the homogeneous maximal ideal m\mathfrak m. Conca–De Negri–Gorla's local cohomology conjecture. For every rNr\in\mathbb{N} and every aZma\in\mathbb{Z}^m, one has

dimKHmr(A/I)a=dimKHmr(A/gin(I))a.\dim_\mathbb{K} H^r_{\mathfrak m}(A/I)_a=\dim_\mathbb{K} H^r_{\mathfrak m}(A/\operatorname{gin}(I))_a.

If true, this would extend the comparison between Cartwright–Sturmfels ideals and their generic initial ideals to all multigraded local cohomology components. The supplied source does not state whether the conjecture has been resolved.

Sources & referencesView supporting material

Primary source

Josep Àlvarez Montaner, “Local cohomology of binomial edge ideals and their generic ideals”, arXiv:1901.08645 (2019).

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