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Theorem nex 1555

Description: Generalization rule for negated wff. (Contributed by NM, 18-May-1994.)

Hypothesis

Ref	Expression
nex.1

Assertion

Ref	Expression
nex

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Proof of Theorem nex

Step	Hyp	Ref	Expression
1		alnex 1543	. 2
2		nex.1	. 2
3	1, 2	mpgbi 1549	1

Colors of variables: wff setvar class

Syntax hints:   wn 3  wex 1541

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1546

This theorem depends on definitions:  df-bi 177  df-ex 1542

This theorem is referenced by:  ru  3045  0nel1c  4159  xp0r  4842  dm0  4918  co02  5092  co01  5093  nenpw1pwlem2  6085

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