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Mirrors > Home > ILE Home > Th. List > caucvgsrlembnd | GIF version |
Description: Lemma for caucvgsr 7757. A Cauchy sequence with a lower bound converges. (Contributed by Jim Kingdon, 19-Jun-2021.) |
Ref | Expression |
---|---|
caucvgsr.f | ⊢ (𝜑 → 𝐹:N⟶R) |
caucvgsr.cau | ⊢ (𝜑 → ∀𝑛 ∈ N ∀𝑘 ∈ N (𝑛 <N 𝑘 → ((𝐹‘𝑛) <R ((𝐹‘𝑘) +R [〈(〈{𝑙 ∣ 𝑙 <Q (*Q‘[〈𝑛, 1o〉] ~Q )}, {𝑢 ∣ (*Q‘[〈𝑛, 1o〉] ~Q ) <Q 𝑢}〉 +P 1P), 1P〉] ~R ) ∧ (𝐹‘𝑘) <R ((𝐹‘𝑛) +R [〈(〈{𝑙 ∣ 𝑙 <Q (*Q‘[〈𝑛, 1o〉] ~Q )}, {𝑢 ∣ (*Q‘[〈𝑛, 1o〉] ~Q ) <Q 𝑢}〉 +P 1P), 1P〉] ~R )))) |
caucvgsrlembnd.bnd | ⊢ (𝜑 → ∀𝑚 ∈ N 𝐴 <R (𝐹‘𝑚)) |
Ref | Expression |
---|---|
caucvgsrlembnd | ⊢ (𝜑 → ∃𝑦 ∈ R ∀𝑥 ∈ R (0R <R 𝑥 → ∃𝑗 ∈ N ∀𝑘 ∈ N (𝑗 <N 𝑘 → ((𝐹‘𝑘) <R (𝑦 +R 𝑥) ∧ 𝑦 <R ((𝐹‘𝑘) +R 𝑥))))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | caucvgsr.f | . 2 ⊢ (𝜑 → 𝐹:N⟶R) | |
2 | caucvgsr.cau | . 2 ⊢ (𝜑 → ∀𝑛 ∈ N ∀𝑘 ∈ N (𝑛 <N 𝑘 → ((𝐹‘𝑛) <R ((𝐹‘𝑘) +R [〈(〈{𝑙 ∣ 𝑙 <Q (*Q‘[〈𝑛, 1o〉] ~Q )}, {𝑢 ∣ (*Q‘[〈𝑛, 1o〉] ~Q ) <Q 𝑢}〉 +P 1P), 1P〉] ~R ) ∧ (𝐹‘𝑘) <R ((𝐹‘𝑛) +R [〈(〈{𝑙 ∣ 𝑙 <Q (*Q‘[〈𝑛, 1o〉] ~Q )}, {𝑢 ∣ (*Q‘[〈𝑛, 1o〉] ~Q ) <Q 𝑢}〉 +P 1P), 1P〉] ~R )))) | |
3 | caucvgsrlembnd.bnd | . 2 ⊢ (𝜑 → ∀𝑚 ∈ N 𝐴 <R (𝐹‘𝑚)) | |
4 | fveq2 5494 | . . . . 5 ⊢ (𝑎 = 𝑏 → (𝐹‘𝑎) = (𝐹‘𝑏)) | |
5 | 4 | oveq1d 5866 | . . . 4 ⊢ (𝑎 = 𝑏 → ((𝐹‘𝑎) +R 1R) = ((𝐹‘𝑏) +R 1R)) |
6 | 5 | oveq1d 5866 | . . 3 ⊢ (𝑎 = 𝑏 → (((𝐹‘𝑎) +R 1R) +R (𝐴 ·R -1R)) = (((𝐹‘𝑏) +R 1R) +R (𝐴 ·R -1R))) |
7 | 6 | cbvmptv 4083 | . 2 ⊢ (𝑎 ∈ N ↦ (((𝐹‘𝑎) +R 1R) +R (𝐴 ·R -1R))) = (𝑏 ∈ N ↦ (((𝐹‘𝑏) +R 1R) +R (𝐴 ·R -1R))) |
8 | 1, 2, 3, 7 | caucvgsrlemoffres 7755 | 1 ⊢ (𝜑 → ∃𝑦 ∈ R ∀𝑥 ∈ R (0R <R 𝑥 → ∃𝑗 ∈ N ∀𝑘 ∈ N (𝑗 <N 𝑘 → ((𝐹‘𝑘) <R (𝑦 +R 𝑥) ∧ 𝑦 <R ((𝐹‘𝑘) +R 𝑥))))) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 {cab 2156 ∀wral 2448 ∃wrex 2449 〈cop 3584 class class class wbr 3987 ↦ cmpt 4048 ⟶wf 5192 ‘cfv 5196 (class class class)co 5851 1oc1o 6386 [cec 6509 Ncnpi 7227 <N clti 7230 ~Q ceq 7234 *Qcrq 7239 <Q cltq 7240 1Pc1p 7247 +P cpp 7248 ~R cer 7251 Rcnr 7252 0Rc0r 7253 1Rc1r 7254 -1Rcm1r 7255 +R cplr 7256 ·R cmr 7257 <R cltr 7258 |
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 609 ax-in2 610 ax-io 704 ax-5 1440 ax-7 1441 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-10 1498 ax-11 1499 ax-i12 1500 ax-bndl 1502 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-i5r 1528 ax-13 2143 ax-14 2144 ax-ext 2152 ax-coll 4102 ax-sep 4105 ax-nul 4113 ax-pow 4158 ax-pr 4192 ax-un 4416 ax-setind 4519 ax-iinf 4570 |
This theorem depends on definitions: df-bi 116 df-dc 830 df-3or 974 df-3an 975 df-tru 1351 df-fal 1354 df-nf 1454 df-sb 1756 df-eu 2022 df-mo 2023 df-clab 2157 df-cleq 2163 df-clel 2166 df-nfc 2301 df-ne 2341 df-ral 2453 df-rex 2454 df-reu 2455 df-rmo 2456 df-rab 2457 df-v 2732 df-sbc 2956 df-csb 3050 df-dif 3123 df-un 3125 df-in 3127 df-ss 3134 df-nul 3415 df-pw 3566 df-sn 3587 df-pr 3588 df-op 3590 df-uni 3795 df-int 3830 df-iun 3873 df-br 3988 df-opab 4049 df-mpt 4050 df-tr 4086 df-eprel 4272 df-id 4276 df-po 4279 df-iso 4280 df-iord 4349 df-on 4351 df-suc 4354 df-iom 4573 df-xp 4615 df-rel 4616 df-cnv 4617 df-co 4618 df-dm 4619 df-rn 4620 df-res 4621 df-ima 4622 df-iota 5158 df-fun 5198 df-fn 5199 df-f 5200 df-f1 5201 df-fo 5202 df-f1o 5203 df-fv 5204 df-riota 5807 df-ov 5854 df-oprab 5855 df-mpo 5856 df-1st 6117 df-2nd 6118 df-recs 6282 df-irdg 6347 df-1o 6393 df-2o 6394 df-oadd 6397 df-omul 6398 df-er 6511 df-ec 6513 df-qs 6517 df-ni 7259 df-pli 7260 df-mi 7261 df-lti 7262 df-plpq 7299 df-mpq 7300 df-enq 7302 df-nqqs 7303 df-plqqs 7304 df-mqqs 7305 df-1nqqs 7306 df-rq 7307 df-ltnqqs 7308 df-enq0 7379 df-nq0 7380 df-0nq0 7381 df-plq0 7382 df-mq0 7383 df-inp 7421 df-i1p 7422 df-iplp 7423 df-imp 7424 df-iltp 7425 df-enr 7681 df-nr 7682 df-plr 7683 df-mr 7684 df-ltr 7685 df-0r 7686 df-1r 7687 df-m1r 7688 |
This theorem is referenced by: caucvgsr 7757 |
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