list_mk_pabspairSyntax.list_mk_pabs : term list * term -> term
Iteratively constructs paired abstractions.
list_mk_pabs([p1,...,pn], t) returns
\p1 ... pn. t.
Fails with list_mk_pabs if the terms in the list are not
paired structures of variables.
boolSyntax.list_mk_abs,
pairSyntax.strip_pabs,
pairSyntax.mk_pabs