exact h1
case h1
P : Formula
Δ : Set Formula
xs_hd : VarName
xs_tl : List VarName
xs_ih : IsDeduct Δ (Forall_ xs_tl P) → IsDeduct Δ P
h1 : IsDeduct Δ (forall_ xs_hd (List.foldr forall_ P xs_tl))
⊢ IsDeduct Δ (forall_ xs_hd (List.foldr forall_ P xs_tl))
no goals