fact: Hypothesis ex5_G8: forall i j h x, gle (psr S) i j -> inc h (Vg (psE S) j) -> (exists2 y, inc y (Vg Gf j) & gle (Vg Er j) y h) -> inc x (Vg Gf i) -> gle (Vg Er i) x (Vf (ex5_f i j) h) -> exists x', [/\ inc x' (Vg Gf j), gle (Vg Er j) x' h & x = Vf (ex5_f i j) x'].
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat)