update in ground and delayed updating

[helm.git] / matita / matita / contribs / lambdadelta / delayed_updating / syntax / path_balanced.ma

diff --git a/matita/matita/contribs/lambdadelta/delayed_updating/syntax/path_balanced.ma b/matita/matita/contribs/lambdadelta/delayed_updating/syntax/path_balanced.ma
index e28a95101395992539af1eb97f43d94f0f8cff85..ffdbf93e48de80e3b56fd6ac260ef64a3449c006 100644 (file)
--- a/matita/matita/contribs/lambdadelta/delayed_updating/syntax/path_balanced.ma
+++ b/matita/matita/contribs/lambdadelta/delayed_updating/syntax/path_balanced.ma
@@ -19,7 +19,7 @@ include "delayed_updating/notation/relations/predicate_squarecap_1.ma".
 
 (* This condition applies to a structural path *)
 inductive pbc: predicate path ≝
-| pbc_empty: pbc 𝐞  
+| pbc_empty: pbc (𝐞)  
 | pbc_redex: ∀b. pbc b → pbc (𝗔◗b◖𝗟)
 | pbc_after: ∀b1,b2. pbc b1 → pbc b2 → pbc (b1●b2)
 .