Definition df-m1r

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

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

Detailed syntax breakdown

Step	Hyp	Ref	Expression
0		cm1r	⊢ -1R
1		c1p	⊢ 1P
2		cpp	⊢ +P
3	1 1 2	co	⊢ ( 1P +P 1P )
4	1 3	cop	⊢ ⟨ 1P , ( 1P +P 1P ) ⟩
5		cer	⊢ ~R
6	4 5	cec	⊢ [ ⟨ 1P , ( 1P +P 1P ) ⟩ ] ~R
7	0 6	wceq	⊢ -1R = [ ⟨ 1P , ( 1P +P 1P ) ⟩ ] ~R