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Definition df-r 11143
Description: Define the set of real numbers. (Contributed by NM, 22-Feb-1996.) (New usage is discouraged.)
Assertion
Ref Expression
df-r ℝ = (R × {0R})

Detailed syntax breakdown of Definition df-r
StepHypRef Expression
1 cr 11132 . 2 class
2 cnr 10883 . . 3 class R
3 c0r 10884 . . . 4 class 0R
43csn 4625 . . 3 class {0R}
52, 4cxp 5671 . 2 class (R × {0R})
61, 5wceq 1534 1 wff ℝ = (R × {0R})
Colors of variables: wff setvar class
This definition is referenced by:  opelreal  11148  elreal  11149  elreal2  11150  axresscn  11166  ax1rid  11179  avril1  30267
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