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Theorem ax11f 2192
Description: Basis step for constructing a substitution instance of ax-11o 2141 without using ax-11o 2141. We can start with any formula in which is not free. (Contributed by NM, 21-Jan-2007.) (Proof modification is discouraged.) (New usage is discouraged.)
Hypothesis
Ref Expression
ax11f.1
Assertion
Ref Expression
ax11f

Proof of Theorem ax11f
StepHypRef Expression
1 ax11f.1 . . 3
2 ax-1 5 . . 3
31, 2alrimih 1565 . 2
43a1ii 24 1
Colors of variables: wff set class
Syntax hints:   wn 3   wi 4  wal 1540
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 8  ax-gen 1546  ax-5 1557
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