Theorem e2bi 38857

Description: Biconditional form of e2 38856. syl6ib 241 is e2bi 38857 without virtual deductions. (Contributed by Alan Sare, 10-Jun-2011.) (Proof modification is discouraged.) (New usage is discouraged.)

Hypotheses

Ref	Expression
e2bi.1	|- (. ph ,. ps ->. ch ).
e2bi.2	|- ( ch <-> th )

Assertion

Ref	Expression
e2bi	|- (. ph ,. ps ->. th ).

Proof of Theorem e2bi

Step	Hyp	Ref	Expression
1		e2bi.1	. 2 |- (. ph ,. ps ->. ch ).
2		e2bi.2	. . 3 |- ( ch <-> th )
3	2	biimpi 206	. 2 |- ( ch -> th )
4	1, 3	e2 38856	1 |- (. ph ,. ps ->. th ).

Syntax hints:   <-> wb 196   (.wvd2 38793

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 197  df-an 386  df-vd2 38794

This theorem is referenced by:  snssiALTVD  39062  eqsbc3rVD  39075  en3lplem2VD  39079  onfrALTlem3VD  39123  onfrALTlem1VD  39126