- labelled sequential reduction started ...

[helm.git] / matita / matita / contribs / lambda / preamble.ma

diff --git a/matita/matita/contribs/lambda/preamble.ma b/matita/matita/contribs/lambda/preamble.ma
index fa36983af635ee6689a23bfcc09591c61db272d8..3d5efb8f2acf300c1107057d1e5b50d7a5ca0073 100644 (file)
--- a/matita/matita/contribs/lambda/preamble.ma
+++ b/matita/matita/contribs/lambda/preamble.ma
@@ -19,6 +19,11 @@ include "arithmetics/nat.ma".
 include "xoa_notation.ma".
 include "xoa.ma".
 
+(* Note: notation for nil not involving brackets *)
+notation > "◊"
+  non associative with precedence 90
+  for @{'nil}.
+
 (* Note: For some reason this cannot be in the standard library *) 
 interpretation "logical false" 'false = False.