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Definition df-r 9395
Description: Define the set of real numbers. (Contributed by NM, 22-Feb-1996.) (New usage is discouraged.)
Assertion
Ref Expression
df-r  |-  RR  =  ( R.  X.  { 0R } )

Detailed syntax breakdown of Definition df-r
StepHypRef Expression
1 cr 9384 . 2  class  RR
2 cnr 9137 . . 3  class  R.
3 c0r 9138 . . . 4  class  0R
43csn 3977 . . 3  class  { 0R }
52, 4cxp 4938 . 2  class  ( R. 
X.  { 0R }
)
61, 5wceq 1370 1  wff  RR  =  ( R.  X.  { 0R } )
Colors of variables: wff setvar class
This definition is referenced by:  opelreal  9400  elreal  9401  elreal2  9402  axresscn  9418  ax1rid  9431  avril1  23793
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