Theorem nexr 1455

Description: Inference from 19.8a 1376. (Contributed by Jeff Hankins, 26-Jul-2009.)

Hypothesis

Ref	Expression
nexr.1	|- -. E.xph

Assertion

Ref	Expression
nexr	|- -. ph

Proof of Theorem nexr

Step	Hyp	Ref	Expression
1		nexr.1	. 2 |- -. E.xph
2		19.8a 1376	. 2 |- (ph -> E.xph)
3	1, 2	mto 121	1 |- -. ph

Syntax hints:  -. wn 2  E.wex 1326

This theorem is referenced by:  fiuni 10219  fsubbas 10281

This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-4 1319

This theorem depends on definitions:  df-bi 164  df-ex 1327

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