initial properies of the "same top term constructor" predicate

[helm.git] / matita / matita / contribs / lambda_delta / Basic_2 / notation.ma

diff --git a/matita/matita/contribs/lambda_delta/Basic_2/notation.ma b/matita/matita/contribs/lambda_delta/Basic_2/notation.ma
index 08ff46477bd79af4ba948c86aad64a0ea6325593..7d05a2f6702028fc976b16b6724c8c4ce9bbc128 100644 (file)
--- a/matita/matita/contribs/lambda_delta/Basic_2/notation.ma
+++ b/matita/matita/contribs/lambda_delta/Basic_2/notation.ma
@@ -112,6 +112,10 @@ notation "hvbox( L ⊢ break term 90 T1 ≈ break T2 )"
    non associative with precedence 45
    for @{ 'Hom $L $T1 $T2 }.
 
+notation "hvbox( T1 ≃ break T2 )"
+   non associative with precedence 45
+   for @{ 'Iso $T1 $T2 }.
+
 notation "hvbox( T1 break [ d , break e ] ≼ break T2 )"
    non associative with precedence 45
    for @{ 'SubEq $T1 $d $e $T2 }.