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Theorems · Theorem · group theory

isUnit_iff_exists

∀ {M : Type u_1} [inst : Monoid M] {x : M}, IsUnit x ↔ ∃ b, x * b = 1 ∧ b * x = 1

See isUnit_iff_exists_and_exists for a similar lemma with two existentials.

Defined in
Mathlib.Algebra.Group.Units.Defs
Cited by
12 results in Mathlib
Foundations
Depth 7 from the axioms · uses no axioms
Assumes
Monoid

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Cited by12

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