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Definition df-succf 23824
Description: Define the successor function. See brsuccf 23891 for its value. (Contributed by Scott Fenton, 14-Apr-2014.)
Assertion
Ref Expression
df-succf  |- Succ  =  (Cup 
o.  (  _I  (x) Singleton ) )

Detailed syntax breakdown of Definition df-succf
StepHypRef Expression
1 csuccf 23802 . 2  class Succ
2 ccup 23800 . . 3  class Cup
3 cid 4304 . . . 4  class  _I
4 csingle 23792 . . . 4  class Singleton
53, 4ctxp 23784 . . 3  class  (  _I 
(x) Singleton )
62, 5ccom 4693 . 2  class  (Cup  o.  (  _I  (x) Singleton ) )
71, 6wceq 1623 1  wff Succ  =  (Cup 
o.  (  _I  (x) Singleton ) )
Colors of variables: wff set class
This definition is referenced by:  brsuccf  23891
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