Finite-depth conjecture for étale sheaves

Let XX be a smooth variety over an algebraically closed field kk of characteristic p2p\neq 2, and let FD(X)\mathcal{F}\in D(X). Write SSFSS\mathcal{F} for its singular support and let (x,ξ)(x,\xi) be a smooth point of SSFSS\mathcal{F}. The finite-depth conjecture. The complex F\mathcal{F} has finite depth at every smooth point of SSFSS\mathcal{F}. The conjecture extends the paper's finite-depth theorem beyond the hypotheses treated there; the condition p2p\neq 2 ensures that there are enough test functions for the depth to be defined. Its general validity remains open.

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Primary source

Tong Zhou, “On the stability of vanishing cycles of étale sheaves in positive characteristic”, arXiv:2307.00416 (2026).

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