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diff --git a/matita/matita/contribs/lambdadelta/basic_2/notation/relations/lrsubeqa_3.ma b/matita/matita/contribs/lambdadelta/basic_2/notation/relations/lrsubeqa_3.ma
index e46553827..238f43331 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/notation/relations/lrsubeqa_3.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/notation/relations/lrsubeqa_3.ma
@@ -14,6 +14,6 @@
 
 (* NOTATION FOR THE FORMAL SYSTEM λδ ****************************************)
 
-notation "hvbox( G ⊢ break term 46 L1 ⁝ ⊑ break term 46 L2 )"
+notation "hvbox( G ⊢ break term 46 L1 ⁝ ⫃ break term 46 L2 )"
    non associative with precedence 45
    for @{ 'LRSubEqA $G $L1 $L2 }.