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Definition df-rp 9070
Description: Define the set of positive reals. Definition of positive numbers in [Apostol] p. 20. (Contributed by NM, 27-Oct-2007.)
Assertion
Ref Expression
df-rp + = {𝑥 ∈ ℝ ∣ 0 < 𝑥}

Detailed syntax breakdown of Definition df-rp
StepHypRef Expression
1 crp 9069 . 2 class +
2 cc0 7297 . . . 4 class 0
3 vx . . . . 5 setvar 𝑥
43cv 1286 . . . 4 class 𝑥
5 clt 7469 . . . 4 class <
62, 4, 5wbr 3822 . . 3 wff 0 < 𝑥
7 cr 7296 . . 3 class
86, 3, 7crab 2359 . 2 class {𝑥 ∈ ℝ ∣ 0 < 𝑥}
91, 8wceq 1287 1 wff + = {𝑥 ∈ ℝ ∣ 0 < 𝑥}
Colors of variables: wff set class
This definition is referenced by:  elrp  9071  rpre  9075  ioorp  9304
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