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Definition df-id_ 25719
Description: Definition of  id_. (Contributed by FL, 26-Oct-2007.)
Assertion
Ref Expression
df-id_  |-  id_  =  ( 1st  o.  2nd )

Detailed syntax breakdown of Definition df-id_
StepHypRef Expression
1 cid_ 25714 . 2  class  id_
2 c1st 6120 . . 3  class  1st
3 c2nd 6121 . . 3  class  2nd
42, 3ccom 4693 . 2  class  ( 1st 
o.  2nd )
51, 4wceq 1623 1  wff  id_  =  ( 1st  o.  2nd )
Colors of variables: wff set class
This definition is referenced by:  idval  25725
  Copyright terms: Public domain W3C validator