Theorem dvdid | index | src |

theorem dvdid (a: nat): $ a || a $;
StepHypRefExpression
1 idvd
1 * a = a -> a || a
2 mul11
1 * a = a
3 1, 2 ax_mp
a || 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_peano (peano2, peano5, addeq, muleq, add0, addS, mul0, mulS)