let h1, h2 be Function of the carrier' of C,(Maps (Hom C)); :: thesis: ( ( for f being Morphism of C holds h1 . f = [[(Hom ((cod f),a)),(Hom ((dom f),a))],(hom (f,a))] ) & ( for f being Morphism of C holds h2 . f = [[(Hom ((cod f),a)),(Hom ((dom f),a))],(hom (f,a))] ) implies h1 = h2 )
assume that
A9: for f being Morphism of C holds h1 . f = [[(Hom ((cod f),a)),(Hom ((dom f),a))],(hom (f,a))] and
A10: for f being Morphism of C holds h2 . f = [[(Hom ((cod f),a)),(Hom ((dom f),a))],(hom (f,a))] ; :: thesis: h1 = h2

now :: thesis: for f being Morphism of C holds h1 . f = h2 . f

let f be Morphism of C; :: thesis: h1 . f = h2 . f
thus h1 . f = [[(Hom ((cod f),a)),(Hom ((dom f),a))],(hom (f,a))] by A9
.= h2 . f by A10 ; :: thesis: verum

end;

hence h1 = h2 by FUNCT_2:63; :: thesis: verum