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Mirrors > Home > ILE Home > Th. List > suplocsr | GIF version |
Description: An inhabited, bounded, located set of signed reals has a supremum. (Contributed by Jim Kingdon, 22-Jan-2024.) |
Ref | Expression |
---|---|
suplocsr.m | ⊢ (𝜑 → ∃𝑥 𝑥 ∈ 𝐴) |
suplocsr.ub | ⊢ (𝜑 → ∃𝑥 ∈ R ∀𝑦 ∈ 𝐴 𝑦 <R 𝑥) |
suplocsr.loc | ⊢ (𝜑 → ∀𝑥 ∈ R ∀𝑦 ∈ R (𝑥 <R 𝑦 → (∃𝑧 ∈ 𝐴 𝑥 <R 𝑧 ∨ ∀𝑧 ∈ 𝐴 𝑧 <R 𝑦))) |
Ref | Expression |
---|---|
suplocsr | ⊢ (𝜑 → ∃𝑥 ∈ R (∀𝑦 ∈ 𝐴 ¬ 𝑥 <R 𝑦 ∧ ∀𝑦 ∈ R (𝑦 <R 𝑥 → ∃𝑧 ∈ 𝐴 𝑦 <R 𝑧))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | suplocsr.m | . . 3 ⊢ (𝜑 → ∃𝑥 𝑥 ∈ 𝐴) | |
2 | eleq1w 2254 | . . . 4 ⊢ (𝑥 = 𝑎 → (𝑥 ∈ 𝐴 ↔ 𝑎 ∈ 𝐴)) | |
3 | 2 | cbvexv 1930 | . . 3 ⊢ (∃𝑥 𝑥 ∈ 𝐴 ↔ ∃𝑎 𝑎 ∈ 𝐴) |
4 | 1, 3 | sylib 122 | . 2 ⊢ (𝜑 → ∃𝑎 𝑎 ∈ 𝐴) |
5 | opeq1 3804 | . . . . . . 7 ⊢ (𝑏 = 𝑐 → 〈𝑏, 1P〉 = 〈𝑐, 1P〉) | |
6 | 5 | eceq1d 6623 | . . . . . 6 ⊢ (𝑏 = 𝑐 → [〈𝑏, 1P〉] ~R = [〈𝑐, 1P〉] ~R ) |
7 | 6 | oveq2d 5934 | . . . . 5 ⊢ (𝑏 = 𝑐 → (𝑎 +R [〈𝑏, 1P〉] ~R ) = (𝑎 +R [〈𝑐, 1P〉] ~R )) |
8 | 7 | eleq1d 2262 | . . . 4 ⊢ (𝑏 = 𝑐 → ((𝑎 +R [〈𝑏, 1P〉] ~R ) ∈ 𝐴 ↔ (𝑎 +R [〈𝑐, 1P〉] ~R ) ∈ 𝐴)) |
9 | 8 | cbvrabv 2759 | . . 3 ⊢ {𝑏 ∈ P ∣ (𝑎 +R [〈𝑏, 1P〉] ~R ) ∈ 𝐴} = {𝑐 ∈ P ∣ (𝑎 +R [〈𝑐, 1P〉] ~R ) ∈ 𝐴} |
10 | suplocsr.ub | . . . . 5 ⊢ (𝜑 → ∃𝑥 ∈ R ∀𝑦 ∈ 𝐴 𝑦 <R 𝑥) | |
11 | ltrelsr 7798 | . . . . . . . . . 10 ⊢ <R ⊆ (R × R) | |
12 | 11 | brel 4711 | . . . . . . . . 9 ⊢ (𝑦 <R 𝑥 → (𝑦 ∈ R ∧ 𝑥 ∈ R)) |
13 | 12 | simpld 112 | . . . . . . . 8 ⊢ (𝑦 <R 𝑥 → 𝑦 ∈ R) |
14 | 13 | ralimi 2557 | . . . . . . 7 ⊢ (∀𝑦 ∈ 𝐴 𝑦 <R 𝑥 → ∀𝑦 ∈ 𝐴 𝑦 ∈ R) |
15 | dfss3 3169 | . . . . . . 7 ⊢ (𝐴 ⊆ R ↔ ∀𝑦 ∈ 𝐴 𝑦 ∈ R) | |
16 | 14, 15 | sylibr 134 | . . . . . 6 ⊢ (∀𝑦 ∈ 𝐴 𝑦 <R 𝑥 → 𝐴 ⊆ R) |
17 | 16 | rexlimivw 2607 | . . . . 5 ⊢ (∃𝑥 ∈ R ∀𝑦 ∈ 𝐴 𝑦 <R 𝑥 → 𝐴 ⊆ R) |
18 | 10, 17 | syl 14 | . . . 4 ⊢ (𝜑 → 𝐴 ⊆ R) |
19 | 18 | adantr 276 | . . 3 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝐴) → 𝐴 ⊆ R) |
20 | simpr 110 | . . 3 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝐴) → 𝑎 ∈ 𝐴) | |
21 | 10 | adantr 276 | . . 3 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝐴) → ∃𝑥 ∈ R ∀𝑦 ∈ 𝐴 𝑦 <R 𝑥) |
22 | suplocsr.loc | . . . 4 ⊢ (𝜑 → ∀𝑥 ∈ R ∀𝑦 ∈ R (𝑥 <R 𝑦 → (∃𝑧 ∈ 𝐴 𝑥 <R 𝑧 ∨ ∀𝑧 ∈ 𝐴 𝑧 <R 𝑦))) | |
23 | 22 | adantr 276 | . . 3 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝐴) → ∀𝑥 ∈ R ∀𝑦 ∈ R (𝑥 <R 𝑦 → (∃𝑧 ∈ 𝐴 𝑥 <R 𝑧 ∨ ∀𝑧 ∈ 𝐴 𝑧 <R 𝑦))) |
24 | 9, 19, 20, 21, 23 | suplocsrlem 7868 | . 2 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝐴) → ∃𝑥 ∈ R (∀𝑦 ∈ 𝐴 ¬ 𝑥 <R 𝑦 ∧ ∀𝑦 ∈ R (𝑦 <R 𝑥 → ∃𝑧 ∈ 𝐴 𝑦 <R 𝑧))) |
25 | 4, 24 | exlimddv 1910 | 1 ⊢ (𝜑 → ∃𝑥 ∈ R (∀𝑦 ∈ 𝐴 ¬ 𝑥 <R 𝑦 ∧ ∀𝑦 ∈ R (𝑦 <R 𝑥 → ∃𝑧 ∈ 𝐴 𝑦 <R 𝑧))) |
Colors of variables: wff set class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 104 ∨ wo 709 ∃wex 1503 ∈ wcel 2164 ∀wral 2472 ∃wrex 2473 {crab 2476 ⊆ wss 3153 〈cop 3621 class class class wbr 4029 (class class class)co 5918 [cec 6585 Pcnp 7351 1Pc1p 7352 ~R cer 7356 Rcnr 7357 +R cplr 7361 <R cltr 7363 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 615 ax-in2 616 ax-io 710 ax-5 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-13 2166 ax-14 2167 ax-ext 2175 ax-coll 4144 ax-sep 4147 ax-nul 4155 ax-pow 4203 ax-pr 4238 ax-un 4464 ax-setind 4569 ax-iinf 4620 |
This theorem depends on definitions: df-bi 117 df-dc 836 df-3or 981 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1472 df-sb 1774 df-eu 2045 df-mo 2046 df-clab 2180 df-cleq 2186 df-clel 2189 df-nfc 2325 df-ne 2365 df-ral 2477 df-rex 2478 df-reu 2479 df-rab 2481 df-v 2762 df-sbc 2986 df-csb 3081 df-dif 3155 df-un 3157 df-in 3159 df-ss 3166 df-nul 3447 df-pw 3603 df-sn 3624 df-pr 3625 df-op 3627 df-uni 3836 df-int 3871 df-iun 3914 df-br 4030 df-opab 4091 df-mpt 4092 df-tr 4128 df-eprel 4320 df-id 4324 df-po 4327 df-iso 4328 df-iord 4397 df-on 4399 df-suc 4402 df-iom 4623 df-xp 4665 df-rel 4666 df-cnv 4667 df-co 4668 df-dm 4669 df-rn 4670 df-res 4671 df-ima 4672 df-iota 5215 df-fun 5256 df-fn 5257 df-f 5258 df-f1 5259 df-fo 5260 df-f1o 5261 df-fv 5262 df-ov 5921 df-oprab 5922 df-mpo 5923 df-1st 6193 df-2nd 6194 df-recs 6358 df-irdg 6423 df-1o 6469 df-2o 6470 df-oadd 6473 df-omul 6474 df-er 6587 df-ec 6589 df-qs 6593 df-ni 7364 df-pli 7365 df-mi 7366 df-lti 7367 df-plpq 7404 df-mpq 7405 df-enq 7407 df-nqqs 7408 df-plqqs 7409 df-mqqs 7410 df-1nqqs 7411 df-rq 7412 df-ltnqqs 7413 df-enq0 7484 df-nq0 7485 df-0nq0 7486 df-plq0 7487 df-mq0 7488 df-inp 7526 df-i1p 7527 df-iplp 7528 df-imp 7529 df-iltp 7530 df-enr 7786 df-nr 7787 df-plr 7788 df-mr 7789 df-ltr 7790 df-0r 7791 df-1r 7792 df-m1r 7793 |
This theorem is referenced by: axpre-suploclemres 7961 |
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