Multiplicity bound conjecture in terms of minimal log discrepancies

Let xXx\in X be a point on a variety with log canonical singularities. Denote e:=dimmx/mx2e:=\dim m_x/m_x^2 and d:=dimXd:=\dim X at xx. The minimal log discrepancy at xx is denoted by mldx(X)\mathrm{mld}_x(X). Multiplicity bound conjecture. If mldx(X)>k1\mathrm{mld}_x(X)>k-1 for some integer 0kd0\le k\le d, then

multxX(ekdk).\mathrm{mult}_xX\le \binom{e-k}{d-k}.

Moreover, equality holds when k=d1k=d-1. This proposed bound generalizes the preceding multiplicity bounds for varieties with Du Bois and rational singularities. Its status is not established in the supplied text.

Sources & referencesView supporting material

Primary source

Sung Gi Park, “Upper bound on the multiplicity of rational and Du Bois singularities”, arXiv:2509.21807 (2025).

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