AddSubgroup.card_dvd_of_surjective

∀ {G : Type u_1} {G' : Type u_2} [inst : AddGroup G] [inst_1 : AddGroup G'] (f : G →+ G'),
  Function.Surjective ⇑f → Nat.card G' ∣ Nat.card G

Defined in: Mathlib.GroupTheory.Index
Cited by: 3 results in Mathlib
Foundations: Depth 97 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: AddGroup AddGroup

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