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Definition df-mndo 21005
Description: A monoid is a semi-group with an identity element. (Contributed by FL, 2-Nov-2009.) (New usage is discouraged.)
Assertion
Ref Expression
df-mndo  |- MndOp  =  (
SemiGrp  i^i  ExId  )

Detailed syntax breakdown of Definition df-mndo
StepHypRef Expression
1 cmndo 21004 . 2  class MndOp
2 csem 20997 . . 3  class  SemiGrp
3 cexid 20981 . . 3  class  ExId
42, 3cin 3151 . 2  class  ( SemiGrp  i^i 
ExId  )
51, 4wceq 1623 1  wff MndOp  =  (
SemiGrp  i^i  ExId  )
Colors of variables: wff set class
This definition is referenced by:  mndoissmgrp  21006  mndoisexid  21007  ismndo  21010
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