Section Distributivity.
Variable gf: rel -> rel.
Hypothesis gf_mon: monotone13 gf.

Lemma gpaco13_dist clo r rg
(CMP: wcompatible13 gf clo)
(DIST: forall r1 r2, clo (r1 \13/ r2) <13= (clo r1 \13/ clo r2)):
gpaco13 gf clo r rg <13= (paco13 gf (rclo13 clo (rg \13/ r)) \13/ rclo13 clo r).