Theorem anim1 | index | src |

theorem anim1 (a b c: wff): $ (a -> b) -> a /\ c -> b /\ c $;
StepHypRefExpression
1 id
(a -> b) -> a -> b
2 1 anim1d
(a -> b) -> a /\ c -> b /\ c

Axiom use

axs_prop_calc (ax_1, ax_2, ax_3, ax_mp)