+++ /dev/null
-(*
- ||M|| This file is part of HELM, an Hypertextual, Electronic
- ||A|| Library of Mathematics, developed at the Computer Science
- ||T|| Department, University of Bologna, Italy.
- ||I||
- ||T|| HELM is free software; you can redistribute it and/or
- ||A|| modify it under the terms of the GNU General Public License
- \ / version 2 or (at your option) any later version.
- \ / This software is distributed as is, NO WARRANTY.
- V_______________________________________________________________ *)
-
-let sh a b =
- if a == b then a else b
-
-let sh1 a1 a2 b1 b2 =
- if a1 == a2 then b1 else b2 (sh a1 a2)
-
-let sh2 a1 a2 b1 b2 c1 c2 =
- if a1 == a2 && b1 == b2 then c1 else c2 (sh a1 a2) (sh b1 b2)
-
-let eq a b = (a == b) || (a = b)