Theorem takeeq2d | index | src |

theorem takeeq2d (_G: wff) (l _n1 _n2: nat):
  $ _G -> _n1 = _n2 $ >
  $ _G -> take l _n1 = take l _n2 $;
StepHypRefExpression
1 eqidd
_G -> l = l
2 hyp _h
_G -> _n1 = _n2
3 1, 2 takeeqd
_G -> take l _n1 = take l _n2

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)