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Definition df-vd2 28646
Description: Definition of a 2-hypothesis virtual deduction. (Contributed by Alan Sare, 14-Nov-2011.) (New usage is discouraged.)
Assertion
Ref Expression
df-vd2  |-  ( (.
ph ,. ps  ->.  ch ).  <->  ( ( ph  /\  ps )  ->  ch ) )

Detailed syntax breakdown of Definition df-vd2
StepHypRef Expression
1 wph . . 3  wff  ph
2 wps . . 3  wff  ps
3 wch . . 3  wff  ch
41, 2, 3wvd2 28645 . 2  wff  (. ph ,. ps  ->.  ch ).
51, 2wa 358 . . 3  wff  ( ph  /\ 
ps )
65, 3wi 4 . 2  wff  ( (
ph  /\  ps )  ->  ch )
74, 6wb 176 1  wff  ( (.
ph ,. ps  ->.  ch ).  <->  ( ( ph  /\  ps )  ->  ch ) )
Colors of variables: wff set class
This definition is referenced by:  dfvd2  28647
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