Theorem anwl ≪ | index | src | ≫ 

theorem anwl (a b c: wff): $ a -> c $ > $ a /\ b -> c $;
StepHypRefExpression
1 hyp h 
a -> c
2 anl 
a /\ b -> a
3 1, 2 syl 
a /\ b -> c

Axiom use

axs_prop_calc (ax_1, ax_2, ax_3, ax_mp)