Srinivas–Takagi F-nilpotent type and Hodge filtration conjecture

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Let XX be an nn-dimensional scheme over C\mathbb C and let x{\mathfrak x} be a normal isolated singularity of XX. Write XanX^{\mathrm{an}} for the analytification and Gr⁡F0\operatorname{Gr}^0_F for the zeroth graded piece of the Hodge filtration. Srinivas–Takagi conjecture. The local ring at x{\mathfrak x} is of FF-nilpotent type if and only if, for every i<dim⁡(X)i<\dim(X),

Gr⁡F0(H{x}i(Xan,C))=0.\operatorname{Gr}^0_F\bigl(H^i_{\{\mathfrak x\}}(X^{\mathrm{an}},\mathbb C)\bigr)=0.

This conjecture relates reduction-modulo-primes properties of singularities to local Hodge theory; the source explicitly describes it as still open.

References

Primary source

Uli Walther and Wenliang Zhang, “Local cohomology – an invitation”, arXiv:2106.09796 (2021).

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