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Definition df-r 7358
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 7347 . 2 class
2 cnr 6854 . . 3 class R
3 c0r 6855 . . . 4 class 0R
43csn 3446 . . 3 class {0R}
52, 4cxp 4436 . 2 class (R × {0R})
61, 5wceq 1289 1 wff ℝ = (R × {0R})
Colors of variables: wff set class
This definition is referenced by:  opelreal  7363  elreal  7364  elreal2  7366  axresscn  7395  ax1rid  7410
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