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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 2238 | . . . 4 ⊢ (𝑥 = 𝑎 → (𝑥 ∈ 𝐴 ↔ 𝑎 ∈ 𝐴)) | |
3 | 2 | cbvexv 1918 | . . 3 ⊢ (∃𝑥 𝑥 ∈ 𝐴 ↔ ∃𝑎 𝑎 ∈ 𝐴) |
4 | 1, 3 | sylib 122 | . 2 ⊢ (𝜑 → ∃𝑎 𝑎 ∈ 𝐴) |
5 | opeq1 3780 | . . . . . . 7 ⊢ (𝑏 = 𝑐 → ⟨𝑏, 1P⟩ = ⟨𝑐, 1P⟩) | |
6 | 5 | eceq1d 6573 | . . . . . 6 ⊢ (𝑏 = 𝑐 → [⟨𝑏, 1P⟩] ~R = [⟨𝑐, 1P⟩] ~R ) |
7 | 6 | oveq2d 5893 | . . . . 5 ⊢ (𝑏 = 𝑐 → (𝑎 +R [⟨𝑏, 1P⟩] ~R ) = (𝑎 +R [⟨𝑐, 1P⟩] ~R )) |
8 | 7 | eleq1d 2246 | . . . 4 ⊢ (𝑏 = 𝑐 → ((𝑎 +R [⟨𝑏, 1P⟩] ~R ) ∈ 𝐴 ↔ (𝑎 +R [⟨𝑐, 1P⟩] ~R ) ∈ 𝐴)) |
9 | 8 | cbvrabv 2738 | . . 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 7739 | . . . . . . . . . 10 ⊢ <R ⊆ (R × R) | |
12 | 11 | brel 4680 | . . . . . . . . 9 ⊢ (𝑦 <R 𝑥 → (𝑦 ∈ R ∧ 𝑥 ∈ R)) |
13 | 12 | simpld 112 | . . . . . . . 8 ⊢ (𝑦 <R 𝑥 → 𝑦 ∈ R) |
14 | 13 | ralimi 2540 | . . . . . . 7 ⊢ (∀𝑦 ∈ 𝐴 𝑦 <R 𝑥 → ∀𝑦 ∈ 𝐴 𝑦 ∈ R) |
15 | dfss3 3147 | . . . . . . 7 ⊢ (𝐴 ⊆ R ↔ ∀𝑦 ∈ 𝐴 𝑦 ∈ R) | |
16 | 14, 15 | sylibr 134 | . . . . . 6 ⊢ (∀𝑦 ∈ 𝐴 𝑦 <R 𝑥 → 𝐴 ⊆ R) |
17 | 16 | rexlimivw 2590 | . . . . 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 7809 | . 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 1898 | 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 708 ∃wex 1492 ∈ wcel 2148 ∀wral 2455 ∃wrex 2456 {crab 2459 ⊆ wss 3131 ⟨cop 3597 class class class wbr 4005 (class class class)co 5877 [cec 6535 Pcnp 7292 1Pc1p 7293 ~R cer 7297 Rcnr 7298 +R cplr 7302 <R cltr 7304 |
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 614 ax-in2 615 ax-io 709 ax-5 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-10 1505 ax-11 1506 ax-i12 1507 ax-bndl 1509 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-i5r 1535 ax-13 2150 ax-14 2151 ax-ext 2159 ax-coll 4120 ax-sep 4123 ax-nul 4131 ax-pow 4176 ax-pr 4211 ax-un 4435 ax-setind 4538 ax-iinf 4589 |
This theorem depends on definitions: df-bi 117 df-dc 835 df-3or 979 df-3an 980 df-tru 1356 df-fal 1359 df-nf 1461 df-sb 1763 df-eu 2029 df-mo 2030 df-clab 2164 df-cleq 2170 df-clel 2173 df-nfc 2308 df-ne 2348 df-ral 2460 df-rex 2461 df-reu 2462 df-rab 2464 df-v 2741 df-sbc 2965 df-csb 3060 df-dif 3133 df-un 3135 df-in 3137 df-ss 3144 df-nul 3425 df-pw 3579 df-sn 3600 df-pr 3601 df-op 3603 df-uni 3812 df-int 3847 df-iun 3890 df-br 4006 df-opab 4067 df-mpt 4068 df-tr 4104 df-eprel 4291 df-id 4295 df-po 4298 df-iso 4299 df-iord 4368 df-on 4370 df-suc 4373 df-iom 4592 df-xp 4634 df-rel 4635 df-cnv 4636 df-co 4637 df-dm 4638 df-rn 4639 df-res 4640 df-ima 4641 df-iota 5180 df-fun 5220 df-fn 5221 df-f 5222 df-f1 5223 df-fo 5224 df-f1o 5225 df-fv 5226 df-ov 5880 df-oprab 5881 df-mpo 5882 df-1st 6143 df-2nd 6144 df-recs 6308 df-irdg 6373 df-1o 6419 df-2o 6420 df-oadd 6423 df-omul 6424 df-er 6537 df-ec 6539 df-qs 6543 df-ni 7305 df-pli 7306 df-mi 7307 df-lti 7308 df-plpq 7345 df-mpq 7346 df-enq 7348 df-nqqs 7349 df-plqqs 7350 df-mqqs 7351 df-1nqqs 7352 df-rq 7353 df-ltnqqs 7354 df-enq0 7425 df-nq0 7426 df-0nq0 7427 df-plq0 7428 df-mq0 7429 df-inp 7467 df-i1p 7468 df-iplp 7469 df-imp 7470 df-iltp 7471 df-enr 7727 df-nr 7728 df-plr 7729 df-mr 7730 df-ltr 7731 df-0r 7732 df-1r 7733 df-m1r 7734 |
This theorem is referenced by: axpre-suploclemres 7902 |
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