Axiom ax-c11 2218

Description: Axiom ax-c11 2218 was the original version of ax-c11n 2219 ("n" for "new"), before it was discovered (in May 2008) that the shorter ax-c11n 2219 could replace it. It appears as Axiom scheme C11' in [Megill] p. 448 (p. 16 of the preprint).

This axiom is obsolete and should no longer be used. It is proved above as theorem axc11 2054. (Contributed by NM, 10-May-1993.) (New usage is discouraged.)

Assertion

Ref	Expression
ax-c11

Detailed syntax breakdown of Axiom ax-c11

Step	Hyp	Ref	Expression
1		vx	. . . 4
2		vy	. . . 4
3	1, 2	weq 1733	. . 3
4	3, 1	wal 1393	. 2
5		wph	. . . 4
6	5, 1	wal 1393	. . 3
7	5, 2	wal 1393	. . 3
8	6, 7	wi 4	. 2
9	4, 8	wi 4	1

This axiom is referenced by:  aecom-o  2230  hbae-o  2232  dral1-o  2233  axc11nfromc11  2256  dvelimf-o  2259