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Theorems · Theorem · number theory

gaussSum_one_left

∀ {R : Type u_1} {R' : Type u_2} [inst : Field R] [inst_1 : Fintype R] [inst_2 : CommRing R'] [IsDomain R']
  {ψ : AddChar R R'}, ψ ≠ 1 → gaussSum 1 ψ = -1

The Gauss sum of the trivial multiplicative character and a nontrivial additive character, over a finite field, is -1.

Defined in
Mathlib.NumberTheory.GaussSum
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Foundations
Depth 67 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes
FieldFintypeCommRingIsDomain

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