Theorem cardeq ≪ | index | src | ≫

theorem cardeq (_s1 _s2: nat): $ _s1 = _s2 -> card _s1 = card _s2 $;

Step	Hyp	Ref	Expression
1		id	_s1 = _s2 -> _s1 = _s2
2	1	cardeqd	_s1 = _s2 -> card _s1 = card _s2

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)