Axiom ax-rrecex 11199

Description: Existence of reciprocal of nonzero real number. Axiom 16 of 22 for real and complex numbers, justified by Theorem axrrecex 11175. (Contributed by Eric Schmidt, 11-Apr-2007.)

Assertion

Ref	Expression
ax-rrecex	⊢ ((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) → ∃𝑥 ∈ ℝ (𝐴 · 𝑥) = 1)

Distinct variable group:   𝑥,𝐴

Detailed syntax breakdown of Axiom ax-rrecex

Step	Hyp	Ref	Expression
1		cA	. . . 4 class 𝐴
2		cr 11126	. . . 4 class ℝ
3	1, 2	wcel 2145	. . 3 wff 𝐴 ∈ ℝ
4		cc0 11127	. . . 4 class 0
5	1, 4	wne 2957	. . 3 wff 𝐴 ≠ 0
6	3, 5	wa 401	. 2 wff (𝐴 ∈ ℝ ∧ 𝐴 ≠ 0)
7		vx	. . . . . 6 setvar 𝑥
8	7	cv 1569	. . . . 5 class 𝑥
9		cmul 11132	. . . . 5 class ·
10	1, 8, 9	co 7416	. . . 4 class (𝐴 · 𝑥)
11		c1 11128	. . . 4 class 1
12	10, 11	wceq 1570	. . 3 wff (𝐴 · 𝑥) = 1
13	12, 7, 2	wrex 3088	. 2 wff ∃𝑥 ∈ ℝ (𝐴 · 𝑥) = 1
14	6, 13	wi 4	1 wff ((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0) → ∃𝑥 ∈ ℝ (𝐴 · 𝑥) = 1)

This axiom is used by:  1re  11235  00id  11412  mul02lem1  11413  addrid  11417  recex  11873  rereccl  11960  xrecex  33352  remulcan2d  43110  remul02  43267  remul01  43269  remulinvcom  43295  remullid  43296  remulcand  43301  rediveud  43305  sn-0tie0  43326