Theorem e01 36973

Description: A virtual deduction elimination rule. (Contributed by Alan Sare, 25-Jul-2011.) (Proof modification is discouraged.) (New usage is discouraged.)

Hypotheses

Ref	Expression
e01.1	|- ph
e01.2	|- (. ps ->. ch ).
e01.3	|- ( ph -> ( ch -> th ) )

Assertion

Ref	Expression
e01	|- (. ps ->. th ).

Proof of Theorem e01

Step	Hyp	Ref	Expression
1		e01.1	. . 3 |- ph
2	1	vd01 36879	. 2 |- (. ps ->. ph ).
3		e01.2	. 2 |- (. ps ->. ch ).
4		e01.3	. 2 |- ( ph -> ( ch -> th ) )
5	2, 3, 4	e11 36970	1 |- (. ps ->. th ).

Syntax hints:   -> wi 4   (.wvd1 36842

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

This theorem depends on definitions:  df-bi 189  df-vd1 36843

This theorem is referenced by:  e01an  36974  trsspwALT  37111  sspwtr  37114  pwtrVD  37125  pwtrrVD  37126  snssiALTVD  37128  snelpwrVD  37132  sstrALT2VD  37135  suctrALT2VD  37137  3impexpVD  37157  ax6e2eqVD  37209  ax6e2ndVD  37210  2sb5ndVD  37212  vk15.4jVD  37216