= Weil cohomology theory
{wiki=Weil_cohomology_theory}
Weil cohomology theory is a set of tools and concepts in algebraic geometry and number theory developed by André Weil to study the properties of algebraic varieties over fields, particularly over finite fields and more generally over local fields. It was introduced as a way to provide a cohomology theory that would capture essential topological and algebraic features of varieties and is particularly characterized by its application to counting points on varieties over finite fields.
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