let o, m be set ; :: thesis: for a, b being Object of (c1Cat (o,m))
for f being Morphism of (c1Cat (o,m)) holds f is Morphism of a,b
let a, b be Object of (c1Cat (o,m)); :: thesis: for f being Morphism of (c1Cat (o,m)) holds f is Morphism of a,b
let f be Morphism of (c1Cat (o,m)); :: thesis: f is Morphism of a,b
f in Hom (a,b) by Th5;
hence f is Morphism of a,b by CAT_1:def 5; :: thesis: verum