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Definition df-r 6897
Description: Define the set of real numbers. (Contributed by NM, 22-Feb-1996.)
Assertion
Ref Expression
df-r ℝ = (R × {0R})

Detailed syntax breakdown of Definition df-r
StepHypRef Expression
1 cr 6886 . 2 class
2 cnr 6393 . . 3 class R
3 c0r 6394 . . . 4 class 0R
43csn 3375 . . 3 class {0R}
52, 4cxp 4343 . 2 class (R × {0R})
61, 5wceq 1243 1 wff ℝ = (R × {0R})
Colors of variables: wff set class
This definition is referenced by:  opelreal  6902  elreal  6903  elreal2  6905  axresscn  6934  ax1rid  6949
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