The Bernstein–Sato formula for the singularity level of local complete intersections

Let ZZ be a reduced local complete intersection of codimension rr. Let p(Z)p(Z) denote its singularity level, and let α~(Z)\widetilde{\alpha}(Z) be the negative of the largest root of the reduced Bernstein–Sato polynomial b~Z(s)=bZ(s)/(s+r)\widetilde{b}_Z(s)=b_Z(s)/(s+r). Bernstein–Sato conjecture.

p(Z)=max{[α~(Z)]r,1}.p(Z)=\max\{[\widetilde{\alpha}(Z)]-r,-1\}.

For hypersurfaces, the analogous formula is known in terms of the minimal exponent. The displayed formula is proposed as the corresponding description for reduced local complete intersections and remains open.

Sources & referencesView supporting material

Primary source

Mircea Mustata and Mihnea Popa, “Hodge filtration on local cohomology, Du Bois complex, and local cohomological dimension”, arXiv:2108.05192 (2022).

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