Theorem lt01 | index | src |

theorem lt01 (a: nat): $ 0 < a <-> a != 0 $;
StepHypRefExpression
1 le11
1 <= a <-> a != 0
2 1 conv d1, lt
0 < a <-> a != 0

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_peano (peano1, peano2, peano5, addeq, add0, addS)