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

State before:
ι : Type u_1
α : Type u_2
inst✝¹ : CommGroup α
inst✝ : DecidableEq α
s t : Finset α
a : α
hs : s.Nonempty
⊢ s * t ⊆ s ↔ t ⊆ s.mulStab
Tactic:
rw [mul_comm, mul_subset_right_iff hs]
State after:
no goals