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Theorems · Theorem · field theory

Polynomial.natSepDegree_eq_of_isAlgClosed

∀ {F : Type u} (E : Type v) [inst : Field F] [inst_1 : Field E] [inst_2 : Algebra F E] (f : Polynomial F)
  [inst_3 : DecidableEq E] [IsAlgClosed E], f.natSepDegree = (f.aroots E).toFinset.card

The separable degree of a polynomial is equal to the number of distinct roots of it over any algebraically closed field.

Defined in
Mathlib.FieldTheory.SeparableDegree
Cited by
9 results in Mathlib
Foundations
Depth 156 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes
FieldFieldAlgebraDecidableEqIsAlgClosed

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Cited by9

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