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Definition df-q 9040
Description: Define the set of rational numbers. Based on definition of rationals in [Apostol] p. 22. See elq 9042 for the relation "is rational." (Contributed by NM, 8-Jan-2002.)
Assertion
Ref Expression
df-q  |-  QQ  =  (  /  " ( ZZ 
X.  NN ) )

Detailed syntax breakdown of Definition df-q
StepHypRef Expression
1 cq 9039 . 2  class  QQ
2 cdiv 8081 . . 3  class  /
3 cz 8686 . . . 4  class  ZZ
4 cn 8360 . . . 4  class  NN
53, 4cxp 4411 . . 3  class  ( ZZ 
X.  NN )
62, 5cima 4416 . 2  class  (  /  " ( ZZ  X.  NN ) )
71, 6wceq 1287 1  wff  QQ  =  (  /  " ( ZZ 
X.  NN ) )
Colors of variables: wff set class
This definition is referenced by:  elq  9042
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