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Theorems · Theorem · number theory

NumberField.IsCMField.of_forall_isConj

∀ (K : Type u_2) [inst : Field K] [inst_1 : CharZero K] [Algebra.IsIntegral ℚ K] [NumberField.IsTotallyComplex K]
  [IsGalois ℚ K] {σ : Gal(K/ℚ)}, (∀ (φ : K →+* ℂ), NumberField.ComplexEmbedding.IsConj φ σ) → NumberField.IsCMField K

A totally complex field that has a unique complex conjugation is CM.

Defined in
Mathlib.NumberTheory.NumberField.CMField
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Foundations
Depth 308 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes
FieldCharZeroAlgebra.IsIntegralNumberField.IsTotallyComplexIsGalois

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