Definition df-m1r 7342

Description: Define signed real constant -1. This is a "temporary" set used in the construction of complex numbers, and is intended to be used only by the construction. (Contributed by NM, 9-Aug-1995.)

Assertion

Ref	Expression
df-m1r	⊢ -1R = [⟨1P, (1P +P 1P)⟩] ~R

Detailed syntax breakdown of Definition df-m1r

Step	Hyp	Ref	Expression
1		cm1r 6922	. 2 class -1R
2		c1p 6914	. . . 4 class 1P
3		cpp 6915	. . . . 5 class +P
4	2, 2, 3	co 5668	. . . 4 class (1P +P 1P)
5	2, 4	cop 3455	. . 3 class ⟨1P, (1P +P 1P)⟩
6		cer 6918	. . 3 class ~R
7	5, 6	cec 6306	. 2 class [⟨1P, (1P +P 1P)⟩] ~R
8	1, 7	wceq 1290	1 wff -1R = [⟨1P, (1P +P 1P)⟩] ~R

This definition is referenced by:  m1r  7361  m1p1sr  7369  m1m1sr  7370