Theorem bool1 | index | src |

theorem bool1: $ bool 1 $;
StepHypRefExpression
1 d1lt2
1 < 2
2 1 conv bool
bool 1

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)