Theorem opt0d | index | src |

theorem opt0d (A: set) (G: wff): $ G -> 0 e. Option A $;
StepHypRefExpression
1 opt0
0 e. Option A
2 1 a1i
G -> 0 e. Option 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 (addeq)