X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Flib%2Fbasics%2Fcore_notation.ma;h=dd672ee842ba699f8556bd9b09ba80fb21ea278d;hb=916c53e11fbf6dda073c8796cd97881c84ec5834;hp=3f6eda5a78fb41e7ec58daf35fd585ca71c36ae4;hpb=c821924472ab07f543c0e4acd0b808715de7a934;p=helm.git

diff --git a/matita/matita/lib/basics/core_notation.ma b/matita/matita/lib/basics/core_notation.ma
index 3f6eda5a7..dd672ee84 100644
--- a/matita/matita/lib/basics/core_notation.ma
+++ b/matita/matita/lib/basics/core_notation.ma
@@ -266,6 +266,9 @@ for @{ 'comprehension $s (\lambda ${ident i}. $p)}.
 notation "hvbox(a break ∈ b)" non associative with precedence 45
 for @{ 'mem $a $b }.
 
+notation "hvbox(a break ∉ b)" non associative with precedence 45
+for @{ 'notmem $a $b }.
+
 notation "hvbox(a break ≬ b)" non associative with precedence 45
 for @{ 'overlaps $a $b }. (* \between *)