Axiom ax-rnegex 7988

Description: Existence of negative of real number. Axiom for real and complex numbers, justified by Theorem axrnegex 7946. (Contributed by Eric Schmidt, 21-May-2007.)

Assertion

Ref	Expression
ax-rnegex	|- ( A e. RR -> E. x e. RR ( A + x ) = 0 )

Distinct variable group:   x, A

Detailed syntax breakdown of Axiom ax-rnegex

Step	Hyp	Ref	Expression
1		cA	. . 3 class A
2		cr 7878	. . 3 class RR
3	1, 2	wcel 2167	. 2 wff A e. RR
4		vx	. . . . . 6 setvar x
5	4	cv 1363	. . . . 5 class x
6		caddc 7882	. . . . 5 class +
7	1, 5, 6	co 5922	. . . 4 class ( A + x )
8		cc0 7879	. . . 4 class 0
9	7, 8	wceq 1364	. . 3 wff ( A + x ) = 0
10	9, 4, 2	wrex 2476	. 2 wff E. x e. RR ( A + x ) = 0
11	3, 10	wi 4	1 wff ( A e. RR -> E. x e. RR ( A + x ) = 0 )

This axiom is referenced by:  0re  8026  readdcan  8166  cnegexlem1  8201  cnegexlem2  8202  cnegexlem3  8203  cnegex  8204  renegcl  8287  ltadd2  8446