Definition df-0r 7732

Description: Define signed real constant 0. This is a "temporary" set used in the construction of complex numbers, and is intended to be used only by the construction. From Proposition 9-4.2 of [Gleason] p. 126. (Contributed by NM, 9-Aug-1995.)

Assertion

Ref	Expression
df-0r	⊢ 0R = [⟨1P, 1P⟩] ~R

Detailed syntax breakdown of Definition df-0r

Step	Hyp	Ref	Expression
1		c0r 7299	. 2 class 0R
2		c1p 7293	. . . 4 class 1P
3	2, 2	cop 3597	. . 3 class ⟨1P, 1P⟩
4		cer 7297	. . 3 class ~R
5	3, 4	cec 6535	. 2 class [⟨1P, 1P⟩] ~R
6	1, 5	wceq 1353	1 wff 0R = [⟨1P, 1P⟩] ~R

This definition is referenced by:  gt0srpr  7749  0r  7751  m1p1sr  7761  0lt1sr  7766  0idsr  7768  00sr  7770  suplocsrlempr  7808  pitoregt0  7850