Section GeneralMonotonicity.
Variable gf: rel -> rel.

Lemma gupaco3_mon_gen (gf' clo clo': rel -> rel) x0 x1 x2 r r'
(IN: @gupaco3 gf clo r x0 x1 x2)
(gf_mon: monotone3 gf)
(LEgf: gf <4= gf')
(LEclo: clo <4= clo')
(LEr: r <3= r'):
@gupaco3 gf' clo' r' x0 x1 x2.