Theorem: Finset.mulStab_empty (LeanCamCombi/Kneser/MulStab.lean)

State before:
ι : Type u_1
α : Type u_2
inst✝¹ : Group α
inst✝ : DecidableEq α
s t : Finset α
a : α
⊢ ∅.mulStab = ∅
Tactic:
simp [mulStab]
State after:
no goals