Theorem nateq | index | src |

theorem nateq (_p1 _p2: wff): $ (_p1 <-> _p2) -> nat _p1 = nat _p2 $;
StepHypRefExpression
1 id
(_p1 <-> _p2) -> (_p1 <-> _p2)
2 1 nateqd
(_p1 <-> _p2) -> nat _p1 = nat _p2

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)