Theorem inv2 ≪ | index | src | ≫

theorem inv2 (A: set): $ A i^i _V == A $;

Step	Hyp	Ref	Expression
1		eqstr	A i^i _V == _V i^i A -> _V i^i A == A -> A i^i _V == A
2		incom	A i^i _V == _V i^i A
3	1, 2	ax_mp	_V i^i A == A -> A i^i _V == A
4		inv1	_V i^i A == A
5	3, 4	ax_mp	A i^i _V == 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)