Theorem nflower ≪ | index | src | ≫

theorem nflower {x: nat} (A: set x): $ FS/ x A $ > $ FN/ x lower A $;

Step	Hyp	Ref	Expression
1		nfsv	FS/ x a1
2		hyp h	FS/ x A
3	1, 2	nfeqs	F/ x a1 == A
4	3	nfab	FS/ x {a1 \| a1 == A}
5	4	nfthe	FN/ x the {a1 \| a1 == A}
6	5	conv lower	FN/ x lower 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), axs_the (theid, the0)