Saito's conjecture on cohomological characteristic classes
Saito's conjecture on cohomological characteristic classes
Let be a perfect field, let be a closed subscheme of a smooth scheme over , and let be the finite local coefficient ring in the setup. Let be a constructible complex of -modules of finite tor-dimension on . Write for the characteristic class defined via the characteristic cycle, and set . The cohomological characteristic class is , where for the structural morphism . Saito's conjecture. One has
where is the cycle class map. This conjecture asserts that the cohomological characteristic class can be computed from the characteristic cycle; the paper confirms it in the quasi-projective case, while the general case is the broader assertion attributed to Saito.
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Sources & referencesView supporting material
Primary source
Enlin Yang and Yigeng Zhao, “Cohomological Milnor formula and Saito's conjecture on characteristic classes”, arXiv:2209.11086 (2025).
Additional references
2 papers in this index state this conjecture (2017–2022). The statement above is taken from the most recent of them; the others are arXiv:1701.02841.
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