Theorem nfns | index | src |

theorem nfns {x: nat} (a: nat x): $ FN/ x a $ > $ FS/ x a $;
StepHypRefExpression
1 nseq
a1 = a -> a1 == a
2 hyp h
FN/ x a
3 1, 2 nfslem
FS/ x 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, addeq, muleq)