∀ (R : Type u_1) (S : Type u_2) (A : Type u_3) (B : Type u_4) [inst : CommRing R] [inst_1 : CommRing S]
  [inst_2 : Algebra R S] [inst_3 : CommRing A] [inst_4 : CommRing B] [inst_5 : Algebra R A] [inst_6 : Algebra R B]
  [inst_7 : Algebra A B] [inst_8 : Algebra S B] [inst_9 : IsScalarTower R A B] [inst_10 : IsScalarTower R S B]
  [h : Algebra.IsPushout R S A B],
  KaehlerDifferential.tensorKaehlerEquivBase R S A B = KaehlerDifferential.tensorKaehlerEquivBase R S A B