-set "baseuri" "cic:/test".
+set "baseuri" "cic:/matita/tests/fold".
alias id "nat" = "cic:/Coq/Init/Datatypes/nat.ind#xpointer(1/1)".
alias num (instance 0) = "natural number".
alias symbol "eq" (instance 0) = "leibnitz's equality".
simplify in match (0+x) in \vdash (? ? % ?).
fold simplify (0 + x) in \vdash (? ? % ?).
reflexivity.
-qed.
\ No newline at end of file
+qed.