\lambda (g: G).(\lambda (c1: C).(\lambda (c2: C).(\lambda (H: (csubc g c1
c2)).(\lambda (t: T).(\lambda (a: A).(\lambda (H0: (arity g c1 t
a)).(csuba_arity g c1 t a H0 c2 (csubc_csuba g c1 c2 H)))))))).
\lambda (g: G).(\lambda (c1: C).(\lambda (c2: C).(\lambda (H: (csubc g c1
c2)).(\lambda (t: T).(\lambda (a: A).(\lambda (H0: (arity g c1 t
a)).(csuba_arity g c1 t a H0 c2 (csubc_csuba g c1 c2 H)))))))).