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Mirrors > Home > ILE Home > Th. List > prarloclem | GIF version |
Description: A special case of Lemma 6.16 from [BauerTaylor], p. 32. Given evenly spaced rational numbers from 𝐴 to 𝐴 +Q (𝑁 ·Q 𝑃) (which are in the lower and upper cuts, respectively, of a real number), there are a pair of numbers, two positions apart in the even spacing, which straddle the cut. (Contributed by Jim Kingdon, 22-Oct-2019.) |
Ref | Expression |
---|---|
prarloclem | ⊢ (((〈𝐿, 𝑈〉 ∈ P ∧ 𝐴 ∈ 𝐿) ∧ (𝑁 ∈ N ∧ 𝑃 ∈ Q ∧ 1o <N 𝑁) ∧ (𝐴 +Q ([〈𝑁, 1o〉] ~Q ·Q 𝑃)) ∈ 𝑈) → ∃𝑗 ∈ ω ((𝐴 +Q0 ([〈𝑗, 1o〉] ~Q0 ·Q0 𝑃)) ∈ 𝐿 ∧ (𝐴 +Q ([〈(𝑗 +o 2o), 1o〉] ~Q ·Q 𝑃)) ∈ 𝑈)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | prarloclem5 7441 | . 2 ⊢ (((〈𝐿, 𝑈〉 ∈ P ∧ 𝐴 ∈ 𝐿) ∧ (𝑁 ∈ N ∧ 𝑃 ∈ Q ∧ 1o <N 𝑁) ∧ (𝐴 +Q ([〈𝑁, 1o〉] ~Q ·Q 𝑃)) ∈ 𝑈) → ∃𝑥 ∈ ω ∃𝑦 ∈ ω ((𝐴 +Q0 ([〈𝑦, 1o〉] ~Q0 ·Q0 𝑃)) ∈ 𝐿 ∧ (𝐴 +Q ([〈((𝑦 +o 2o) +o 𝑥), 1o〉] ~Q ·Q 𝑃)) ∈ 𝑈)) | |
2 | prarloclem4 7439 | . . . 4 ⊢ (((〈𝐿, 𝑈〉 ∈ P ∧ 𝐴 ∈ 𝐿) ∧ 𝑃 ∈ Q) → (∃𝑥 ∈ ω ∃𝑦 ∈ ω ((𝐴 +Q0 ([〈𝑦, 1o〉] ~Q0 ·Q0 𝑃)) ∈ 𝐿 ∧ (𝐴 +Q ([〈((𝑦 +o 2o) +o 𝑥), 1o〉] ~Q ·Q 𝑃)) ∈ 𝑈) → ∃𝑗 ∈ ω ((𝐴 +Q0 ([〈𝑗, 1o〉] ~Q0 ·Q0 𝑃)) ∈ 𝐿 ∧ (𝐴 +Q ([〈(𝑗 +o 2o), 1o〉] ~Q ·Q 𝑃)) ∈ 𝑈))) | |
3 | 2 | 3ad2antr2 1153 | . . 3 ⊢ (((〈𝐿, 𝑈〉 ∈ P ∧ 𝐴 ∈ 𝐿) ∧ (𝑁 ∈ N ∧ 𝑃 ∈ Q ∧ 1o <N 𝑁)) → (∃𝑥 ∈ ω ∃𝑦 ∈ ω ((𝐴 +Q0 ([〈𝑦, 1o〉] ~Q0 ·Q0 𝑃)) ∈ 𝐿 ∧ (𝐴 +Q ([〈((𝑦 +o 2o) +o 𝑥), 1o〉] ~Q ·Q 𝑃)) ∈ 𝑈) → ∃𝑗 ∈ ω ((𝐴 +Q0 ([〈𝑗, 1o〉] ~Q0 ·Q0 𝑃)) ∈ 𝐿 ∧ (𝐴 +Q ([〈(𝑗 +o 2o), 1o〉] ~Q ·Q 𝑃)) ∈ 𝑈))) |
4 | 3 | 3adant3 1007 | . 2 ⊢ (((〈𝐿, 𝑈〉 ∈ P ∧ 𝐴 ∈ 𝐿) ∧ (𝑁 ∈ N ∧ 𝑃 ∈ Q ∧ 1o <N 𝑁) ∧ (𝐴 +Q ([〈𝑁, 1o〉] ~Q ·Q 𝑃)) ∈ 𝑈) → (∃𝑥 ∈ ω ∃𝑦 ∈ ω ((𝐴 +Q0 ([〈𝑦, 1o〉] ~Q0 ·Q0 𝑃)) ∈ 𝐿 ∧ (𝐴 +Q ([〈((𝑦 +o 2o) +o 𝑥), 1o〉] ~Q ·Q 𝑃)) ∈ 𝑈) → ∃𝑗 ∈ ω ((𝐴 +Q0 ([〈𝑗, 1o〉] ~Q0 ·Q0 𝑃)) ∈ 𝐿 ∧ (𝐴 +Q ([〈(𝑗 +o 2o), 1o〉] ~Q ·Q 𝑃)) ∈ 𝑈))) |
5 | 1, 4 | mpd 13 | 1 ⊢ (((〈𝐿, 𝑈〉 ∈ P ∧ 𝐴 ∈ 𝐿) ∧ (𝑁 ∈ N ∧ 𝑃 ∈ Q ∧ 1o <N 𝑁) ∧ (𝐴 +Q ([〈𝑁, 1o〉] ~Q ·Q 𝑃)) ∈ 𝑈) → ∃𝑗 ∈ ω ((𝐴 +Q0 ([〈𝑗, 1o〉] ~Q0 ·Q0 𝑃)) ∈ 𝐿 ∧ (𝐴 +Q ([〈(𝑗 +o 2o), 1o〉] ~Q ·Q 𝑃)) ∈ 𝑈)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ∧ w3a 968 ∈ wcel 2136 ∃wrex 2445 〈cop 3579 class class class wbr 3982 ωcom 4567 (class class class)co 5842 1oc1o 6377 2oc2o 6378 +o coa 6381 [cec 6499 Ncnpi 7213 <N clti 7216 ~Q ceq 7220 Qcnq 7221 +Q cplq 7223 ·Q cmq 7224 ~Q0 ceq0 7227 +Q0 cplq0 7230 ·Q0 cmq0 7231 Pcnp 7232 |
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 604 ax-in2 605 ax-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-13 2138 ax-14 2139 ax-ext 2147 ax-coll 4097 ax-sep 4100 ax-nul 4108 ax-pow 4153 ax-pr 4187 ax-un 4411 ax-setind 4514 ax-iinf 4565 |
This theorem depends on definitions: df-bi 116 df-dc 825 df-3or 969 df-3an 970 df-tru 1346 df-fal 1349 df-nf 1449 df-sb 1751 df-eu 2017 df-mo 2018 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ne 2337 df-ral 2449 df-rex 2450 df-reu 2451 df-rab 2453 df-v 2728 df-sbc 2952 df-csb 3046 df-dif 3118 df-un 3120 df-in 3122 df-ss 3129 df-nul 3410 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-uni 3790 df-int 3825 df-iun 3868 df-br 3983 df-opab 4044 df-mpt 4045 df-tr 4081 df-eprel 4267 df-id 4271 df-iord 4344 df-on 4346 df-suc 4349 df-iom 4568 df-xp 4610 df-rel 4611 df-cnv 4612 df-co 4613 df-dm 4614 df-rn 4615 df-res 4616 df-ima 4617 df-iota 5153 df-fun 5190 df-fn 5191 df-f 5192 df-f1 5193 df-fo 5194 df-f1o 5195 df-fv 5196 df-ov 5845 df-oprab 5846 df-mpo 5847 df-1st 6108 df-2nd 6109 df-recs 6273 df-irdg 6338 df-1o 6384 df-2o 6385 df-oadd 6388 df-omul 6389 df-er 6501 df-ec 6503 df-qs 6507 df-ni 7245 df-pli 7246 df-mi 7247 df-lti 7248 df-plpq 7285 df-mpq 7286 df-enq 7288 df-nqqs 7289 df-plqqs 7290 df-mqqs 7291 df-ltnqqs 7294 df-enq0 7365 df-nq0 7366 df-0nq0 7367 df-plq0 7368 df-mq0 7369 df-inp 7407 |
This theorem is referenced by: prarloc 7444 |
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