bool_ext on 'o' not on 'Prop' (they are convertible, but discrimination

trees do not compare up to conversion)

From: tassi <tassi@c2b2084f-9a08-0410-b176-e24b037a169a>

diff --git a/helm/software/matita/nlibrary/TPTP.ma b/helm/software/matita/nlibrary/TPTP.ma
index 326b673fca01b6b43338921663f0c31986607e96..3f5eefb901b2e755770c9aa2811ccddfc405e8e3 100644 (file)
--- a/helm/software/matita/nlibrary/TPTP.ma
+++ b/helm/software/matita/nlibrary/TPTP.ma
@@ -34,5 +34,5 @@ interpretation "myeq" 'myeq T A B = (eq T A B).
 notation > "'Eq' term 90 A term 90 B" 
 non associative with precedence 40 for @{'myeq ? $A $B}.
 
-naxiom bool_ext : ∀P,Q: Prop. (P → Q) → (Q → P) → P = Q.
+naxiom bool_ext : ∀P,Q: o. (P → Q) → (Q → P) → P = Q.
 naxiom f_ext_1 : ∀a,b:Type[0].∀f,g: a → b. (∀x.f x = g x) → f = g.