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Axiom ax-rnegex 6991
Description: Existence of negative of real number. Axiom for real and complex numbers, justified by theorem axrnegex 6951. (Contributed by Eric Schmidt, 21-May-2007.)
Assertion
Ref Expression
ax-rnegex (𝐴 ∈ ℝ → ∃𝑥 ∈ ℝ (𝐴 + 𝑥) = 0)
Distinct variable group:   𝑥,𝐴

Detailed syntax breakdown of Axiom ax-rnegex
StepHypRef Expression
1 cA . . 3 class 𝐴
2 cr 6886 . . 3 class
31, 2wcel 1393 . 2 wff 𝐴 ∈ ℝ
4 vx . . . . . 6 setvar 𝑥
54cv 1242 . . . . 5 class 𝑥
6 caddc 6890 . . . . 5 class +
71, 5, 6co 5512 . . . 4 class (𝐴 + 𝑥)
8 cc0 6887 . . . 4 class 0
97, 8wceq 1243 . . 3 wff (𝐴 + 𝑥) = 0
109, 4, 2wrex 2307 . 2 wff 𝑥 ∈ ℝ (𝐴 + 𝑥) = 0
113, 10wi 4 1 wff (𝐴 ∈ ℝ → ∃𝑥 ∈ ℝ (𝐴 + 𝑥) = 0)
Colors of variables: wff set class
This axiom is referenced by:  0re  7025  readdcan  7151  cnegexlem1  7184  cnegexlem2  7185  cnegexlem3  7186  cnegex  7187  renegcl  7270  ltadd2  7414
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