Theorem inseq2d | index | src |

theorem inseq2d (_G: wff) (a _b1 _b2: nat):
  $ _G -> _b1 = _b2 $ >
  $ _G -> a ; _b1 = a ; _b2 $;
StepHypRefExpression
1 eqidd
_G -> a = a
2 hyp _h
_G -> _b1 = _b2
3 1, 2 inseqd
_G -> a ; _b1 = a ; _b2

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 (peano2, addeq, muleq)