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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 2299 | . . . 4 ⊢ (𝑥 = 𝑎 → (𝑥 ∈ 𝐴 ↔ 𝑎 ∈ 𝐴)) | |
| 3 | 2 | cbvexv 1974 | . . 3 ⊢ (∃𝑥 𝑥 ∈ 𝐴 ↔ ∃𝑎 𝑎 ∈ 𝐴) |
| 4 | 1, 3 | sylib 122 | . 2 ⊢ (𝜑 → ∃𝑎 𝑎 ∈ 𝐴) |
| 5 | opeq1 3902 | . . . . . . 7 ⊢ (𝑏 = 𝑐 → 〈𝑏, 1P〉 = 〈𝑐, 1P〉) | |
| 6 | 5 | eceq1d 6837 | . . . . . 6 ⊢ (𝑏 = 𝑐 → [〈𝑏, 1P〉] ~R = [〈𝑐, 1P〉] ~R ) |
| 7 | 6 | oveq2d 6095 | . . . . 5 ⊢ (𝑏 = 𝑐 → (𝑎 +R [〈𝑏, 1P〉] ~R ) = (𝑎 +R [〈𝑐, 1P〉] ~R )) |
| 8 | 7 | eleq1d 2307 | . . . 4 ⊢ (𝑏 = 𝑐 → ((𝑎 +R [〈𝑏, 1P〉] ~R ) ∈ 𝐴 ↔ (𝑎 +R [〈𝑐, 1P〉] ~R ) ∈ 𝐴)) |
| 9 | 8 | cbvrabv 2820 | . . 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 8099 | . . . . . . . . . 10 ⊢ <R ⊆ (R × R) | |
| 12 | 11 | brel 4825 | . . . . . . . . 9 ⊢ (𝑦 <R 𝑥 → (𝑦 ∈ R ∧ 𝑥 ∈ R)) |
| 13 | 12 | simpld 112 | . . . . . . . 8 ⊢ (𝑦 <R 𝑥 → 𝑦 ∈ R) |
| 14 | 13 | ralimi 2613 | . . . . . . 7 ⊢ (∀𝑦 ∈ 𝐴 𝑦 <R 𝑥 → ∀𝑦 ∈ 𝐴 𝑦 ∈ R) |
| 15 | dfss3 3236 | . . . . . . 7 ⊢ (𝐴 ⊆ R ↔ ∀𝑦 ∈ 𝐴 𝑦 ∈ R) | |
| 16 | 14, 15 | sylibr 134 | . . . . . 6 ⊢ (∀𝑦 ∈ 𝐴 𝑦 <R 𝑥 → 𝐴 ⊆ R) |
| 17 | 16 | rexlimivw 2664 | . . . . 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 8169 | . 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 1954 | 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 720 ∃wex 1545 ∈ wcel 2209 ∀wral 2528 ∃wrex 2529 {crab 2532 ⊆ wss 3220 〈cop 3711 class class class wbr 4128 (class class class)co 6079 [cec 6799 Pcnp 7652 1Pc1p 7653 ~R cer 7657 Rcnr 7658 +R cplr 7662 <R cltr 7664 |
| 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 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-coll 4244 ax-sep 4247 ax-nul 4257 ax-pow 4309 ax-pr 4344 ax-un 4576 ax-setind 4682 ax-iinf 4733 |
| This theorem depends on definitions: df-bi 117 df-dc 847 df-3or 1010 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-ral 2533 df-rex 2534 df-reu 2535 df-rab 2537 df-v 2823 df-sbc 3052 df-csb 3148 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-nul 3521 df-pw 3690 df-sn 3714 df-pr 3715 df-op 3717 df-uni 3934 df-int 3969 df-iun 4012 df-br 4129 df-opab 4191 df-mpt 4192 df-tr 4228 df-eprel 4432 df-id 4436 df-po 4439 df-iso 4440 df-iord 4509 df-on 4511 df-suc 4514 df-iom 4736 df-xp 4778 df-rel 4779 df-cnv 4780 df-co 4781 df-dm 4782 df-rn 4783 df-res 4784 df-ima 4785 df-iota 5335 df-fun 5377 df-fn 5378 df-f 5379 df-f1 5380 df-fo 5381 df-f1o 5382 df-fv 5383 df-ov 6082 df-oprab 6083 df-mpo 6084 df-1st 6368 df-2nd 6369 df-recs 6570 df-irdg 6635 df-1o 6681 df-2o 6682 df-oadd 6685 df-omul 6686 df-er 6801 df-ec 6803 df-qs 6807 df-ni 7665 df-pli 7666 df-mi 7667 df-lti 7668 df-plpq 7705 df-mpq 7706 df-enq 7708 df-nqqs 7709 df-plqqs 7710 df-mqqs 7711 df-1nqqs 7712 df-rq 7713 df-ltnqqs 7714 df-enq0 7785 df-nq0 7786 df-0nq0 7787 df-plq0 7788 df-mq0 7789 df-inp 7827 df-i1p 7828 df-iplp 7829 df-imp 7830 df-iltp 7831 df-enr 8087 df-nr 8088 df-plr 8089 df-mr 8090 df-ltr 8091 df-0r 8092 df-1r 8093 df-m1r 8094 |
| This theorem is referenced by: axpre-suploclemres 8262 |
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