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      An Effective Criterion for Finite Monodromy of ℓ-Adic Sheaves 

      Rojas León, Antonio (Springer, 2023-02-01)
      We provide an effective version of Katz’ criterion for finiteness of the monodromy group of a lisse, pure of weight zero, -adic sheaf on a normal variety over a finite field, depending on the numerical complexity of the sheaf.
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      Purity of exponential sums on An 

      Rojas León, Antonio (Kluwer, 2006-03)
      We give a purity result for two kinds of exponential sums of the type ∑x∈knψ(f(x)), where k is a finite field of characteristic ...