- some bugs fixed in the domain-based preorders on environments

[helm.git] / helm / software / matita / contribs / LAMBDA-TYPES / LambdaDelta-1 / csubc / defs.ma

diff --git a/helm/software/matita/contribs/LAMBDA-TYPES/LambdaDelta-1/csubc/defs.ma b/helm/software/matita/contribs/LAMBDA-TYPES/LambdaDelta-1/csubc/defs.ma
index 9f18fca8d87d570b9a0555681edbe1f6216018bf..9d22e520ed9975029d90c2efca4ff91f9cfe9191 100644 (file)
--- a/helm/software/matita/contribs/LAMBDA-TYPES/LambdaDelta-1/csubc/defs.ma
+++ b/helm/software/matita/contribs/LAMBDA-TYPES/LambdaDelta-1/csubc/defs.ma
@@ -20,6 +20,9 @@ inductive csubc (g: G): C \to (C \to Prop) \def
 | csubc_sort: \forall (n: nat).(csubc g (CSort n) (CSort n))
 | csubc_head: \forall (c1: C).(\forall (c2: C).((csubc g c1 c2) \to (\forall 
 (k: K).(\forall (v: T).(csubc g (CHead c1 k v) (CHead c2 k v))))))
+| csubc_void: \forall (c1: C).(\forall (c2: C).((csubc g c1 c2) \to (\forall 
+(b: B).((not (eq B b Void)) \to (\forall (u1: T).(\forall (u2: T).(csubc g 
+(CHead c1 (Bind Void) u1) (CHead c2 (Bind b) u2))))))))
 | csubc_abst: \forall (c1: C).(\forall (c2: C).((csubc g c1 c2) \to (\forall 
 (v: T).(\forall (a: A).((sc3 g (asucc g a) c1 v) \to (\forall (w: T).((sc3 g 
 a c2 w) \to (csubc g (CHead c1 (Bind Abst) v) (CHead c2 (Bind Abbr)