Theorem iand ≪ | index | src | ≫

theorem iand (a b c: wff): $ a -> b $ > $ a -> c $ > $ a -> b /\ c $;

Step	Hyp	Ref	Expression
1		ian	b -> c -> b /\ c
2		hyp h1	a -> b
3		hyp h2	a -> c
4	1, 2, 3	sylc	a -> b /\ c

Axiom use

axs_prop_calc (ax_1, ax_2, ax_3, ax_mp)