Theorem axaddrcl 10563

Description: Closure law for addition in the real subfield of complex numbers. Axiom 5 of 22 for real and complex numbers, derived from ZF set theory. This construction-dependent theorem should not be referenced directly, nor should the proven axiom ax-addrcl 10587 be used later. Instead, in most cases use readdcl 10609. (Contributed by NM, 31-Mar-1996.) (New usage is discouraged.)

Assertion

Ref	Expression
axaddrcl	⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 + 𝐵) ∈ ℝ)

Proof of Theorem axaddrcl

Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		elreal 10542	. 2 ⊢ (𝐴 ∈ ℝ ↔ ∃𝑥 ∈ R ⟨𝑥, 0R⟩ = 𝐴)
2		elreal 10542	. 2 ⊢ (𝐵 ∈ ℝ ↔ ∃𝑦 ∈ R ⟨𝑦, 0R⟩ = 𝐵)
3		oveq1 7142	. . 3 ⊢ (⟨𝑥, 0R⟩ = 𝐴 → (⟨𝑥, 0R⟩ + ⟨𝑦, 0R⟩) = (𝐴 + ⟨𝑦, 0R⟩))
4	3	eleq1d 2874	. 2 ⊢ (⟨𝑥, 0R⟩ = 𝐴 → ((⟨𝑥, 0R⟩ + ⟨𝑦, 0R⟩) ∈ ℝ ↔ (𝐴 + ⟨𝑦, 0R⟩) ∈ ℝ))
5		oveq2 7143	. . 3 ⊢ (⟨𝑦, 0R⟩ = 𝐵 → (𝐴 + ⟨𝑦, 0R⟩) = (𝐴 + 𝐵))
6	5	eleq1d 2874	. 2 ⊢ (⟨𝑦, 0R⟩ = 𝐵 → ((𝐴 + ⟨𝑦, 0R⟩) ∈ ℝ ↔ (𝐴 + 𝐵) ∈ ℝ))
7		addresr 10549	. . 3 ⊢ ((𝑥 ∈ R ∧ 𝑦 ∈ R) → (⟨𝑥, 0R⟩ + ⟨𝑦, 0R⟩) = ⟨(𝑥 +R 𝑦), 0R⟩)
8		addclsr 10494	. . . 4 ⊢ ((𝑥 ∈ R ∧ 𝑦 ∈ R) → (𝑥 +R 𝑦) ∈ R)
9		opelreal 10541	. . . 4 ⊢ (⟨(𝑥 +R 𝑦), 0R⟩ ∈ ℝ ↔ (𝑥 +R 𝑦) ∈ R)
10	8, 9	sylibr 237	. . 3 ⊢ ((𝑥 ∈ R ∧ 𝑦 ∈ R) → ⟨(𝑥 +R 𝑦), 0R⟩ ∈ ℝ)
11	7, 10	eqeltrd 2890	. 2 ⊢ ((𝑥 ∈ R ∧ 𝑦 ∈ R) → (⟨𝑥, 0R⟩ + ⟨𝑦, 0R⟩) ∈ ℝ)
12	1, 2, 4, 6, 11	2gencl 3482	1 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 + 𝐵) ∈ ℝ)

Syntax hints:   → wi 4   ∧ wa 399   = wceq 1538   ∈ wcel 2111  ⟨cop 4531  (class class class)co 7135  Rcnr 10276  0_Rc0r 10277   +_R cplr 10280  ℝcr 10525   + caddc 10529

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2113  ax-9 2121  ax-10 2142  ax-11 2158  ax-12 2175  ax-ext 2770  ax-sep 5167  ax-nul 5174  ax-pow 5231  ax-pr 5295  ax-un 7441  ax-inf2 9088

This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3or 1085  df-3an 1086  df-tru 1541  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2598  df-eu 2629  df-clab 2777  df-cleq 2791  df-clel 2870  df-nfc 2938  df-ne 2988  df-ral 3111  df-rex 3112  df-reu 3113  df-rmo 3114  df-rab 3115  df-v 3443  df-sbc 3721  df-csb 3829  df-dif 3884  df-un 3886  df-in 3888  df-ss 3898  df-pss 3900  df-nul 4244  df-if 4426  df-pw 4499  df-sn 4526  df-pr 4528  df-tp 4530  df-op 4532  df-uni 4801  df-int 4839  df-iun 4883  df-br 5031  df-opab 5093  df-mpt 5111  df-tr 5137  df-id 5425  df-eprel 5430  df-po 5438  df-so 5439  df-fr 5478  df-we 5480  df-xp 5525  df-rel 5526  df-cnv 5527  df-co 5528  df-dm 5529  df-rn 5530  df-res 5531  df-ima 5532  df-pred 6116  df-ord 6162  df-on 6163  df-lim 6164  df-suc 6165  df-iota 6283  df-fun 6326  df-fn 6327  df-f 6328  df-f1 6329  df-fo 6330  df-f1o 6331  df-fv 6332  df-ov 7138  df-oprab 7139  df-mpo 7140  df-om 7561  df-1st 7671  df-2nd 7672  df-wrecs 7930  df-recs 7991  df-rdg 8029  df-1o 8085  df-oadd 8089  df-omul 8090  df-er 8272  df-ec 8274  df-qs 8278  df-ni 10283  df-pli 10284  df-mi 10285  df-lti 10286  df-plpq 10319  df-mpq 10320  df-ltpq 10321  df-enq 10322  df-nq 10323  df-erq 10324  df-plq 10325  df-mq 10326  df-1nq 10327  df-rq 10328  df-ltnq 10329  df-np 10392  df-1p 10393  df-plp 10394  df-ltp 10396  df-enr 10466  df-nr 10467  df-plr 10468  df-0r 10471  df-c 10532  df-r 10536  df-add 10537

This theorem is referenced by: (None)