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Mirrors > Home > ILE Home > Th. List > addclsr | GIF version |
Description: Closure of addition on signed reals. (Contributed by NM, 25-Jul-1995.) |
Ref | Expression |
---|---|
addclsr | ⊢ ((𝐴 ∈ R ∧ 𝐵 ∈ R) → (𝐴 +R 𝐵) ∈ R) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-nr 7648 | . . 3 ⊢ R = ((P × P) / ~R ) | |
2 | oveq1 5832 | . . . 4 ⊢ ([〈𝑥, 𝑦〉] ~R = 𝐴 → ([〈𝑥, 𝑦〉] ~R +R [〈𝑧, 𝑤〉] ~R ) = (𝐴 +R [〈𝑧, 𝑤〉] ~R )) | |
3 | 2 | eleq1d 2226 | . . 3 ⊢ ([〈𝑥, 𝑦〉] ~R = 𝐴 → (([〈𝑥, 𝑦〉] ~R +R [〈𝑧, 𝑤〉] ~R ) ∈ ((P × P) / ~R ) ↔ (𝐴 +R [〈𝑧, 𝑤〉] ~R ) ∈ ((P × P) / ~R ))) |
4 | oveq2 5833 | . . . 4 ⊢ ([〈𝑧, 𝑤〉] ~R = 𝐵 → (𝐴 +R [〈𝑧, 𝑤〉] ~R ) = (𝐴 +R 𝐵)) | |
5 | 4 | eleq1d 2226 | . . 3 ⊢ ([〈𝑧, 𝑤〉] ~R = 𝐵 → ((𝐴 +R [〈𝑧, 𝑤〉] ~R ) ∈ ((P × P) / ~R ) ↔ (𝐴 +R 𝐵) ∈ ((P × P) / ~R ))) |
6 | addsrpr 7666 | . . . 4 ⊢ (((𝑥 ∈ P ∧ 𝑦 ∈ P) ∧ (𝑧 ∈ P ∧ 𝑤 ∈ P)) → ([〈𝑥, 𝑦〉] ~R +R [〈𝑧, 𝑤〉] ~R ) = [〈(𝑥 +P 𝑧), (𝑦 +P 𝑤)〉] ~R ) | |
7 | addclpr 7458 | . . . . . . 7 ⊢ ((𝑥 ∈ P ∧ 𝑧 ∈ P) → (𝑥 +P 𝑧) ∈ P) | |
8 | addclpr 7458 | . . . . . . 7 ⊢ ((𝑦 ∈ P ∧ 𝑤 ∈ P) → (𝑦 +P 𝑤) ∈ P) | |
9 | 7, 8 | anim12i 336 | . . . . . 6 ⊢ (((𝑥 ∈ P ∧ 𝑧 ∈ P) ∧ (𝑦 ∈ P ∧ 𝑤 ∈ P)) → ((𝑥 +P 𝑧) ∈ P ∧ (𝑦 +P 𝑤) ∈ P)) |
10 | 9 | an4s 578 | . . . . 5 ⊢ (((𝑥 ∈ P ∧ 𝑦 ∈ P) ∧ (𝑧 ∈ P ∧ 𝑤 ∈ P)) → ((𝑥 +P 𝑧) ∈ P ∧ (𝑦 +P 𝑤) ∈ P)) |
11 | opelxpi 4619 | . . . . 5 ⊢ (((𝑥 +P 𝑧) ∈ P ∧ (𝑦 +P 𝑤) ∈ P) → 〈(𝑥 +P 𝑧), (𝑦 +P 𝑤)〉 ∈ (P × P)) | |
12 | enrex 7658 | . . . . . 6 ⊢ ~R ∈ V | |
13 | 12 | ecelqsi 6535 | . . . . 5 ⊢ (〈(𝑥 +P 𝑧), (𝑦 +P 𝑤)〉 ∈ (P × P) → [〈(𝑥 +P 𝑧), (𝑦 +P 𝑤)〉] ~R ∈ ((P × P) / ~R )) |
14 | 10, 11, 13 | 3syl 17 | . . . 4 ⊢ (((𝑥 ∈ P ∧ 𝑦 ∈ P) ∧ (𝑧 ∈ P ∧ 𝑤 ∈ P)) → [〈(𝑥 +P 𝑧), (𝑦 +P 𝑤)〉] ~R ∈ ((P × P) / ~R )) |
15 | 6, 14 | eqeltrd 2234 | . . 3 ⊢ (((𝑥 ∈ P ∧ 𝑦 ∈ P) ∧ (𝑧 ∈ P ∧ 𝑤 ∈ P)) → ([〈𝑥, 𝑦〉] ~R +R [〈𝑧, 𝑤〉] ~R ) ∈ ((P × P) / ~R )) |
16 | 1, 3, 5, 15 | 2ecoptocl 6569 | . 2 ⊢ ((𝐴 ∈ R ∧ 𝐵 ∈ R) → (𝐴 +R 𝐵) ∈ ((P × P) / ~R )) |
17 | 16, 1 | eleqtrrdi 2251 | 1 ⊢ ((𝐴 ∈ R ∧ 𝐵 ∈ R) → (𝐴 +R 𝐵) ∈ R) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 = wceq 1335 ∈ wcel 2128 〈cop 3563 × cxp 4585 (class class class)co 5825 [cec 6479 / cqs 6480 Pcnp 7212 +P cpp 7214 ~R cer 7217 Rcnr 7218 +R cplr 7222 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1427 ax-7 1428 ax-gen 1429 ax-ie1 1473 ax-ie2 1474 ax-8 1484 ax-10 1485 ax-11 1486 ax-i12 1487 ax-bndl 1489 ax-4 1490 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-13 2130 ax-14 2131 ax-ext 2139 ax-coll 4080 ax-sep 4083 ax-nul 4091 ax-pow 4136 ax-pr 4170 ax-un 4394 ax-setind 4497 ax-iinf 4548 |
This theorem depends on definitions: df-bi 116 df-dc 821 df-3or 964 df-3an 965 df-tru 1338 df-fal 1341 df-nf 1441 df-sb 1743 df-eu 2009 df-mo 2010 df-clab 2144 df-cleq 2150 df-clel 2153 df-nfc 2288 df-ne 2328 df-ral 2440 df-rex 2441 df-reu 2442 df-rab 2444 df-v 2714 df-sbc 2938 df-csb 3032 df-dif 3104 df-un 3106 df-in 3108 df-ss 3115 df-nul 3395 df-pw 3545 df-sn 3566 df-pr 3567 df-op 3569 df-uni 3774 df-int 3809 df-iun 3852 df-br 3967 df-opab 4027 df-mpt 4028 df-tr 4064 df-eprel 4250 df-id 4254 df-po 4257 df-iso 4258 df-iord 4327 df-on 4329 df-suc 4332 df-iom 4551 df-xp 4593 df-rel 4594 df-cnv 4595 df-co 4596 df-dm 4597 df-rn 4598 df-res 4599 df-ima 4600 df-iota 5136 df-fun 5173 df-fn 5174 df-f 5175 df-f1 5176 df-fo 5177 df-f1o 5178 df-fv 5179 df-ov 5828 df-oprab 5829 df-mpo 5830 df-1st 6089 df-2nd 6090 df-recs 6253 df-irdg 6318 df-1o 6364 df-2o 6365 df-oadd 6368 df-omul 6369 df-er 6481 df-ec 6483 df-qs 6487 df-ni 7225 df-pli 7226 df-mi 7227 df-lti 7228 df-plpq 7265 df-mpq 7266 df-enq 7268 df-nqqs 7269 df-plqqs 7270 df-mqqs 7271 df-1nqqs 7272 df-rq 7273 df-ltnqqs 7274 df-enq0 7345 df-nq0 7346 df-0nq0 7347 df-plq0 7348 df-mq0 7349 df-inp 7387 df-iplp 7389 df-enr 7647 df-nr 7648 df-plr 7649 |
This theorem is referenced by: ltm1sr 7698 caucvgsrlemoffval 7717 caucvgsrlemofff 7718 caucvgsrlemoffcau 7719 caucvgsrlemoffres 7721 caucvgsr 7723 map2psrprg 7726 suplocsrlemb 7727 suplocsrlem 7729 addcnsr 7755 mulcnsr 7756 addcnsrec 7763 mulcnsrec 7764 axaddcl 7785 axaddrcl 7786 axmulcl 7787 axaddass 7793 axmulass 7794 axdistr 7795 |
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