Weights conjecture for intersection cohomology of rigid-analytic varieties
Weights conjecture for intersection cohomology of rigid-analytic varieties
Let be a -adic local field with residue field of cardinality , let be a quasi-compact and quasi-separated rigid-analytic -variety of dimension , and let be a prime number. Let and denote the relevant generic- and special-fiber Galois groups, and let and denote compactly supported and ordinary intersection cohomology. Weights conjecture. For any projecting to geometric Frobenius in and any integer , the eigenvalues of on
are -Weil numbers of weights at most , and the eigenvalues on
are -Weil numbers of weights at least . In particular, when is smooth and proper, the eigenvalues on have weights between and . This conjecture extends known weight bounds from algebraic varieties to general quasi-compact quasi-separated rigid-analytic varieties; the smooth proper algebraic case is noted in the source as known via alterations and semistable results, while the analytic assertion remains open.
Sources & referencesView supporting material
Primary source
David Hansen and Bogdan Zavyalov, “Arithmetic Properties Of -adic Étale Cohomology and Nearby Cycles of Rigid-Analytic Spaces”, arXiv:2301.01800 (2025).
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