is mentioned by

Thm* r:rel(), i:. closed_rel(r) i < ||r.args|| closed_term(r.args[i])	[closed_rel_args]
Thm* t:Term, ds:Collection(dec()), da1,da2:Collection(SimpleType) , de:sig(). closed_term(t) term_types(ds;da1;de;t) = term_types(ds;da2;de;t)	[term_types_closed]

In prior sections: mb automata 2

Try larger context: GenAutomata