Deligne's conjecture on Frobenius invariants of lisse sheaves with fixed local monodromy
Let be a smooth curve over a finite field , let be its smooth compactification, and let be the set of irreducible lisse -sheaves of rank on with prescribed local data. Define
Let denote the cardinality of the -invariants of . Deligne's conjecture. (i) There are finitely many Weil numbers of weights between and such that
(ii) If , precisely one of the numbers has weight ; it is one of the and equals . The conjecture predicts a precise Weil-number description of the point counts of the moduli problem with fixed local monodromy. The supplied text gives the geometric setup and the asserted formula but no resolution status.
References
Primary source
Hélène Esnault and Moritz Kerz, “A finiteness theorem for Galois representations of function fields over finite fields (after Deligne)”, arXiv:1208.0128 (2012).
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