Definition df-rp 13010

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	⊢ ℝ+ = {𝑥 ∈ ℝ ∣ 0 < 𝑥}

Detailed syntax breakdown of Definition df-rp

Step	Hyp	Ref	Expression
1		crp 13009	. 2 class ℝ+
2		cc0 11140	. . . 4 class 0
3		vx	. . . . 5 setvar 𝑥
4	3	cv 1532	. . . 4 class 𝑥
5		clt 11280	. . . 4 class <
6	2, 4, 5	wbr 5149	. . 3 wff 0 < 𝑥
7		cr 11139	. . 3 class ℝ
8	6, 3, 7	crab 3418	. 2 class {𝑥 ∈ ℝ ∣ 0 < 𝑥}
9	1, 8	wceq 1533	1 wff ℝ+ = {𝑥 ∈ ℝ ∣ 0 < 𝑥}

This definition is referenced by:  elrp  13011  rpssre  13016  ioorp  13437