Section HIDE.
Variable x y : proc.
Variable E : Set.
Variable e : E.
Variable a : act.
Variable L : ehlist.

Axiom TI1 : ~ In_ehlist a L -> ia E a e = hide L (ia E a e).
Axiom TI2 : In_ehlist a L -> ia one tau i = hide L (ia E a e).
Axiom TI3 : Delta = hide L Delta.
Axiom TI4 : alt (hide L x) (hide L y) = hide L (alt x y).
Axiom TI5 : seq (hide L x) (hide L y) = hide L (seq x y).