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Definition df-q 10249
Description: Define the set of rational numbers. Based on definition of rationals in [Apostol] p. 22. See elq 10250 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 10248 . 2  class  QQ
2 cdiv 9356 . . 3  class  /
3 cz 9956 . . . 4  class  ZZ
4 cn 9679 . . . 4  class  NN
53, 4cxp 4624 . . 3  class  ( ZZ 
X.  NN )
62, 5cima 4629 . 2  class  (  /  " ( ZZ  X.  NN ) )
71, 6wceq 1619 1  wff  QQ  =  (  /  " ( ZZ 
X.  NN ) )
Colors of variables: wff set class
This definition is referenced by:  elq  10250
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