The relative p-adic monodromy-weight conjecture for a proper SNCL scheme with a relative SNCD

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Let SS be a pp-adic scheme, let X/S0X/S_0 be a proper SNCL scheme with relative SNCD DD, and let f ⁣:X→Sf\colon X\to S be the structural morphism. Let PP and PDP^D be the weight filtrations on Rqf(X,D)/S∗(O(X,D)/S)R^qf_{(X,D)/S*}(\mathcal O_{(X,D)/S}), and let

N ⁣:Rqf(X,D)/S∗(O(X,D)/S)⟶Rqf(X,D)/S∗(O(X,D)/S)(−1)N\colon R^qf_{(X,D)/S*}(\mathcal O_{(X,D)/S})\longrightarrow R^qf_{(X,D)/S*}(\mathcal O_{(X,D)/S})(-1)

be the monodromy operator. Relative p-adic monodromy conjecture. If X∘\overset{\circ}{X} is projective over S∘\overset{\circ}{S}, then the relative monodromy filtration MM with respect to PDP^D exists and equals PP. Equivalently, for q,e,k∈Nq,e,k\in\mathbb N, the induced morphism

Ne ⁣:gr⁡q+k+ePgr⁡kPDRqf(X,D)/S∗(O(X,D)/S)⟶gr⁡q+k−ePgr⁡kPDRqf(X,D)/S∗(O(X,D)/S)(−e)N^e\colon \operatorname{gr}^P_{q+k+e}\operatorname{gr}^{P^D}_k R^qf_{(X,D)/S*}(\mathcal O_{(X,D)/S})\longrightarrow \operatorname{gr}^P_{q+k-e}\operatorname{gr}^{P^D}_k R^qf_{(X,D)/S*}(\mathcal O_{(X,D)/S})(-e)

is an isomorphism modulo torsion. The conjecture extends the monodromy-weight statement to the bifiltered complex associated with a relative SNCD; the source gives no resolution status.

References

Primary source

Yukiyoshi Nakkajima, “The zariskian p-adic bifiltered El Zein-Steenbrink-Zucker complex of a proper SNCL scheme with a relative SNCD”, arXiv:2509.05603 (2026).

Additional references

2 papers in this index state this conjecture (2025). The statement above is taken from the most recent of them; the others are arXiv:2504.00201.

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