2 ||M|| This file is part of HELM, an Hypertextual, Electronic
3 ||A|| Library of Mathematics, developed at the Computer Science
4 ||T|| Department of the University of Bologna, Italy.
8 \ / This file is distributed under the terms of the
9 \ / GNU General Public License Version 2
10 V_______________________________________________________________ *)
12 include "basics/jmeq.ma".
13 include "basics/types.ma".
15 coercion inject nocomposites: ∀A.∀P:A → Prop.∀a.∀p:P a.Sig A P ≝ mk_Sig on a:? to Sig ??.
16 coercion eject nocomposites: ∀A.∀P:A → Prop.∀c:Sig A P.A ≝ pi1 on _c:Sig ?? to ?.