45 years of Deligne’s Fourier transform

It is exactly 45 years ago today that Deligne, in a letter to David Kazhdan (available here) introduced the $latex \ell$-adic version of the classical Fourier transform… This construction, which operates on sheaves (or better complexes, or objects of the derived category, or…) on the additive group (or more generally a commutative unipotent algebraic group) … Continue reading 45 years of Deligne’s Fourier transform