@{\lambda ${ident i} . $p}}}.
*)
-interpretation "constructive exists" 'exists \eta.x = (ex _ x).
-interpretation "constructive exists (Type)" 'exists \eta.x = (exT _ x).
+interpretation "constructive exists" 'exists \eta.x = (ex ? x).
+interpretation "constructive exists (Type)" 'exists \eta.x = (exT ? x).
alias id "False" = "cic:/matita/logic/connectives/False.ind#xpointer(1/1)".
definition Not ≝ λx:Type.x → False.