Theorem nfsuc ≪ | index | src | ≫

theorem nfsuc {x: nat} (a: nat x): $ FN/ x a $ > $ FN/ x suc a $;

Step	Hyp	Ref	Expression
1		suceq	y = a -> suc y = suc a
2		hyp h	FN/ x a
3	1, 2	nfnlem	FN/ x suc a

Axiom use

axs_prop_calc (ax_1, ax_2, ax_3, ax_mp, itru), axs_pred_calc (ax_gen, ax_4, ax_5, ax_6, ax_7, ax_10, ax_11, ax_12), axs_set (elab, ax_8), axs_the (theid, the0), axs_peano (peano2)