= minus_star_image o2 o3 b' (A o2 (minus_star_image o1 o2 a' (A o1 X))));
[2: intro; apply sym1; apply (.= #‡(†((H' ?)\sup -1))); apply sym1; apply (K X);]
clear K H' H1';
- alias symbol "compose" (instance 2) = "category1 composition".
-cut (∀X:Ω \sup o1.
- minus_star_image o1 o3 (b ∘ a) (A o1 X) = minus_star_image o1 o3 (b'∘a') (A o1 X));
+alias symbol "compose" (instance 1) = "category1 composition".
+cut (∀X:Ω^o1.
+ minus_star_image ?? (b ∘ a) (A o1 X) =_1 minus_star_image ?? (b'∘a') (A o1 X));
[2: intro;
apply (.= (minus_star_image_comp ??????));
apply (.= #‡(saturated ?????));