Theorem nfres ≪ | index | src | ≫

theorem nfres {x: nat} (A B: set x):
  $ FS/ x A $ >
  $ FS/ x B $ >
  $ FS/ x A |` B $;

Step	Hyp	Ref	Expression
1		hyp h1	FS/ x A
2		hyp h2	FS/ x B
3		nfsv	FS/ x _V
4	2, 3	nfxp	FS/ x Xp B _V
5	1, 4	nfin	FS/ x A i^i Xp B _V
6	5	conv res	FS/ x A \|` B

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)