Definition df-0r 10972

Description: Define signed real constant 0. This is a "temporary" set used in the construction of complex numbers df-c 11033, 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.) (New usage is discouraged.)

Assertion

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

Detailed syntax breakdown of Definition df-0r

Step	Hyp	Ref	Expression
1		c0r 10778	. 2 class 0R
2		c1p 10772	. . . 4 class 1P
3	2, 2	cop 4574	. . 3 class ⟨1P, 1P⟩
4		cer 10776	. . 3 class ~R
5	3, 4	cec 8632	. 2 class [⟨1P, 1P⟩] ~R
6	1, 5	wceq 1542	1 wff 0R = [⟨1P, 1P⟩] ~R

This definition is referenced by:  gt0srpr  10990  0r  10992  m1p1sr  11004  0lt1sr  11007  0idsr  11009  00sr  11011  supsrlem  11023