Definition df-0r 6908

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 6488	. 2 class 0R
2		c1p 6482	. . . 4 class 1P
3	2, 2	cop 3401	. . 3 class ⟨1P, 1P⟩
4		cer 6486	. . 3 class ~R
5	3, 4	cec 6127	. 2 class [⟨1P, 1P⟩] ~R
6	1, 5	wceq 1284	1 wff 0R = [⟨1P, 1P⟩] ~R

This definition is referenced by:  gt0srpr  6925  0r  6927  m1p1sr  6937  0lt1sr  6942  0idsr  6944  00sr  6946  pitoregt0  7017