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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 2267 | . . . 4 ⊢ (𝑥 = 𝑎 → (𝑥 ∈ 𝐴 ↔ 𝑎 ∈ 𝐴)) | |
| 3 | 2 | cbvexv 1943 | . . 3 ⊢ (∃𝑥 𝑥 ∈ 𝐴 ↔ ∃𝑎 𝑎 ∈ 𝐴) |
| 4 | 1, 3 | sylib 122 | . 2 ⊢ (𝜑 → ∃𝑎 𝑎 ∈ 𝐴) |
| 5 | opeq1 3828 | . . . . . . 7 ⊢ (𝑏 = 𝑐 → 〈𝑏, 1P〉 = 〈𝑐, 1P〉) | |
| 6 | 5 | eceq1d 6674 | . . . . . 6 ⊢ (𝑏 = 𝑐 → [〈𝑏, 1P〉] ~R = [〈𝑐, 1P〉] ~R ) |
| 7 | 6 | oveq2d 5978 | . . . . 5 ⊢ (𝑏 = 𝑐 → (𝑎 +R [〈𝑏, 1P〉] ~R ) = (𝑎 +R [〈𝑐, 1P〉] ~R )) |
| 8 | 7 | eleq1d 2275 | . . . 4 ⊢ (𝑏 = 𝑐 → ((𝑎 +R [〈𝑏, 1P〉] ~R ) ∈ 𝐴 ↔ (𝑎 +R [〈𝑐, 1P〉] ~R ) ∈ 𝐴)) |
| 9 | 8 | cbvrabv 2772 | . . 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 7881 | . . . . . . . . . 10 ⊢ <R ⊆ (R × R) | |
| 12 | 11 | brel 4740 | . . . . . . . . 9 ⊢ (𝑦 <R 𝑥 → (𝑦 ∈ R ∧ 𝑥 ∈ R)) |
| 13 | 12 | simpld 112 | . . . . . . . 8 ⊢ (𝑦 <R 𝑥 → 𝑦 ∈ R) |
| 14 | 13 | ralimi 2570 | . . . . . . 7 ⊢ (∀𝑦 ∈ 𝐴 𝑦 <R 𝑥 → ∀𝑦 ∈ 𝐴 𝑦 ∈ R) |
| 15 | dfss3 3186 | . . . . . . 7 ⊢ (𝐴 ⊆ R ↔ ∀𝑦 ∈ 𝐴 𝑦 ∈ R) | |
| 16 | 14, 15 | sylibr 134 | . . . . . 6 ⊢ (∀𝑦 ∈ 𝐴 𝑦 <R 𝑥 → 𝐴 ⊆ R) |
| 17 | 16 | rexlimivw 2620 | . . . . 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 7951 | . 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 1923 | 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 710 ∃wex 1516 ∈ wcel 2177 ∀wral 2485 ∃wrex 2486 {crab 2489 ⊆ wss 3170 〈cop 3641 class class class wbr 4054 (class class class)co 5962 [cec 6636 Pcnp 7434 1Pc1p 7435 ~R cer 7439 Rcnr 7440 +R cplr 7444 <R cltr 7446 |
| 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 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-13 2179 ax-14 2180 ax-ext 2188 ax-coll 4170 ax-sep 4173 ax-nul 4181 ax-pow 4229 ax-pr 4264 ax-un 4493 ax-setind 4598 ax-iinf 4649 |
| This theorem depends on definitions: df-bi 117 df-dc 837 df-3or 982 df-3an 983 df-tru 1376 df-fal 1379 df-nf 1485 df-sb 1787 df-eu 2058 df-mo 2059 df-clab 2193 df-cleq 2199 df-clel 2202 df-nfc 2338 df-ne 2378 df-ral 2490 df-rex 2491 df-reu 2492 df-rab 2494 df-v 2775 df-sbc 3003 df-csb 3098 df-dif 3172 df-un 3174 df-in 3176 df-ss 3183 df-nul 3465 df-pw 3623 df-sn 3644 df-pr 3645 df-op 3647 df-uni 3860 df-int 3895 df-iun 3938 df-br 4055 df-opab 4117 df-mpt 4118 df-tr 4154 df-eprel 4349 df-id 4353 df-po 4356 df-iso 4357 df-iord 4426 df-on 4428 df-suc 4431 df-iom 4652 df-xp 4694 df-rel 4695 df-cnv 4696 df-co 4697 df-dm 4698 df-rn 4699 df-res 4700 df-ima 4701 df-iota 5246 df-fun 5287 df-fn 5288 df-f 5289 df-f1 5290 df-fo 5291 df-f1o 5292 df-fv 5293 df-ov 5965 df-oprab 5966 df-mpo 5967 df-1st 6244 df-2nd 6245 df-recs 6409 df-irdg 6474 df-1o 6520 df-2o 6521 df-oadd 6524 df-omul 6525 df-er 6638 df-ec 6640 df-qs 6644 df-ni 7447 df-pli 7448 df-mi 7449 df-lti 7450 df-plpq 7487 df-mpq 7488 df-enq 7490 df-nqqs 7491 df-plqqs 7492 df-mqqs 7493 df-1nqqs 7494 df-rq 7495 df-ltnqqs 7496 df-enq0 7567 df-nq0 7568 df-0nq0 7569 df-plq0 7570 df-mq0 7571 df-inp 7609 df-i1p 7610 df-iplp 7611 df-imp 7612 df-iltp 7613 df-enr 7869 df-nr 7870 df-plr 7871 df-mr 7872 df-ltr 7873 df-0r 7874 df-1r 7875 df-m1r 7876 |
| This theorem is referenced by: axpre-suploclemres 8044 |
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