- notation change for weight functions (following lambda)

[helm.git] / matita / matita / contribs / lambdadelta / basic_2 / grammar / term_weight.ma

diff --git a/matita/matita/contribs/lambdadelta/basic_2/grammar/term_weight.ma b/matita/matita/contribs/lambdadelta/basic_2/grammar/term_weight.ma
index 3f9fbef8775b55a2e353acea9aafbedceca23a44..2e3f96bc78ed7b1bb35461f34c77292a359fc830 100644 (file)
--- a/matita/matita/contribs/lambdadelta/basic_2/grammar/term_weight.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/grammar/term_weight.ma
@@ -26,7 +26,7 @@ interpretation "weight (term)" 'Weight T = (tw T).
 (* Basic properties *********************************************************)
 
 (* Basic_1: was: tweight_lt *)
-lemma tw_pos: ∀T. 1 ≤ #{T}.
+lemma tw_pos: ∀T. 1 ≤ ♯{T}.
 #T elim T -T //
 qed.