Axiom ax-rnegex 7085

Description: Existence of negative of real number. Axiom for real and complex numbers, justified by theorem axrnegex 7045. (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 6980	. . 3 class RR
3	1, 2	wcel 1433	. 2 wff A e. RR
4		vx	. . . . . 6 setvar x
5	4	cv 1283	. . . . 5 class x
6		caddc 6984	. . . . 5 class +
7	1, 5, 6	co 5532	. . . 4 class ( A + x )
8		cc0 6981	. . . 4 class 0
9	7, 8	wceq 1284	. . 3 wff ( A + x ) = 0
10	9, 4, 2	wrex 2349	. 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  7119  readdcan  7248  cnegexlem1  7283  cnegexlem2  7284  cnegexlem3  7285  cnegex  7286  renegcl  7369  ltadd2  7523