Grothendieck topology on schemes generalizing étale maps. ℓ-adic cohomology Hⁱ(X, ℚℓ); tool for Weil conjectures (Deligne 1974).
Grothendieck topology on schemes generalizing étale maps. ℓ-adic cohomology Hⁱ(X, ℚℓ); tool for Weil conjectures (Deligne 1974).