Hodge ideals and m-adic approximation conjecture

Let XX be a smooth complex variety, let DD be a reduced effective divisor on XX, and let kk be a non-negative integer. For a point xXx\in X defined by the ideal mx\mathfrak m_x, and for every integer r1r\geq 1, consider reduced effective divisors EE satisfying

OX(E)OX(D)+mxq(r).\mathscr{O}_X(-E)\subseteq\mathscr{O}_X(-D)+\mathfrak m_x^{q(r)}.

Hodge ideals and m-adic approximation conjecture. There exists a positive integer q(r)q(r) such that, for every such EE,

Ik(E)Ik(D)+mxr.I_k(E)\subseteq I_k(D)+\mathfrak m_x^r.

Here Ik(D)I_k(D) denotes the kkth Hodge ideal of DD. The conjecture proposes continuity of Hodge ideals under sufficiently high mx\mathfrak m_x-adic approximation; the supplied text gives no resolution status.

Sources & referencesView supporting material

Primary source

Mircea Mustata, Sebastian Olano and Mihnea Popa, “Local vanishing and Hodge filtration for rational singularities”, arXiv:1703.06704 (2018).

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