Definition df-0r 7956

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 7523	. 2 class 0R
2		c1p 7517	. . . 4 class 1P
3	2, 2	cop 3673	. . 3 class ⟨1P, 1P⟩
4		cer 7521	. . 3 class ~R
5	3, 4	cec 6705	. 2 class [⟨1P, 1P⟩] ~R
6	1, 5	wceq 1397	1 wff 0R = [⟨1P, 1P⟩] ~R

This definition is referenced by:  gt0srpr  7973  0r  7975  m1p1sr  7985  0lt1sr  7990  0idsr  7992  00sr  7994  suplocsrlempr  8032  pitoregt0  8074