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| Mirrors > Home > ILE Home > Th. List > ivthinclemex | GIF version | ||
| Description: Lemma for ivthinc 15525. Existence of a number between the lower cut and the upper cut. (Contributed by Jim Kingdon, 20-Feb-2024.) |
| Ref | Expression |
|---|---|
| ivth.1 | ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| ivth.2 | ⊢ (𝜑 → 𝐵 ∈ ℝ) |
| ivth.3 | ⊢ (𝜑 → 𝑈 ∈ ℝ) |
| ivth.4 | ⊢ (𝜑 → 𝐴 < 𝐵) |
| ivth.5 | ⊢ (𝜑 → (𝐴[,]𝐵) ⊆ 𝐷) |
| ivth.7 | ⊢ (𝜑 → 𝐹 ∈ (𝐷–cn→ℂ)) |
| ivth.8 | ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) → (𝐹‘𝑥) ∈ ℝ) |
| ivth.9 | ⊢ (𝜑 → ((𝐹‘𝐴) < 𝑈 ∧ 𝑈 < (𝐹‘𝐵))) |
| ivthinc.i | ⊢ (((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑥 < 𝑦)) → (𝐹‘𝑥) < (𝐹‘𝑦)) |
| ivthinclem.l | ⊢ 𝐿 = {𝑤 ∈ (𝐴[,]𝐵) ∣ (𝐹‘𝑤) < 𝑈} |
| ivthinclem.r | ⊢ 𝑅 = {𝑤 ∈ (𝐴[,]𝐵) ∣ 𝑈 < (𝐹‘𝑤)} |
| Ref | Expression |
|---|---|
| ivthinclemex | ⊢ (𝜑 → ∃!𝑧 ∈ (𝐴(,)𝐵)(∀𝑞 ∈ 𝐿 𝑞 < 𝑧 ∧ ∀𝑟 ∈ 𝑅 𝑧 < 𝑟)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ivth.1 | . 2 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
| 2 | ivth.2 | . 2 ⊢ (𝜑 → 𝐵 ∈ ℝ) | |
| 3 | ivthinclem.l | . . . 4 ⊢ 𝐿 = {𝑤 ∈ (𝐴[,]𝐵) ∣ (𝐹‘𝑤) < 𝑈} | |
| 4 | ssrab2 3325 | . . . 4 ⊢ {𝑤 ∈ (𝐴[,]𝐵) ∣ (𝐹‘𝑤) < 𝑈} ⊆ (𝐴[,]𝐵) | |
| 5 | 3, 4 | eqsstri 3272 | . . 3 ⊢ 𝐿 ⊆ (𝐴[,]𝐵) |
| 6 | 5 | a1i 9 | . 2 ⊢ (𝜑 → 𝐿 ⊆ (𝐴[,]𝐵)) |
| 7 | ivthinclem.r | . . . 4 ⊢ 𝑅 = {𝑤 ∈ (𝐴[,]𝐵) ∣ 𝑈 < (𝐹‘𝑤)} | |
| 8 | ssrab2 3325 | . . . 4 ⊢ {𝑤 ∈ (𝐴[,]𝐵) ∣ 𝑈 < (𝐹‘𝑤)} ⊆ (𝐴[,]𝐵) | |
| 9 | 7, 8 | eqsstri 3272 | . . 3 ⊢ 𝑅 ⊆ (𝐴[,]𝐵) |
| 10 | 9 | a1i 9 | . 2 ⊢ (𝜑 → 𝑅 ⊆ (𝐴[,]𝐵)) |
| 11 | ivth.3 | . . 3 ⊢ (𝜑 → 𝑈 ∈ ℝ) | |
| 12 | ivth.4 | . . 3 ⊢ (𝜑 → 𝐴 < 𝐵) | |
| 13 | ivth.5 | . . 3 ⊢ (𝜑 → (𝐴[,]𝐵) ⊆ 𝐷) | |
| 14 | ivth.7 | . . 3 ⊢ (𝜑 → 𝐹 ∈ (𝐷–cn→ℂ)) | |
| 15 | ivth.8 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) → (𝐹‘𝑥) ∈ ℝ) | |
| 16 | ivth.9 | . . 3 ⊢ (𝜑 → ((𝐹‘𝐴) < 𝑈 ∧ 𝑈 < (𝐹‘𝐵))) | |
| 17 | ivthinc.i | . . 3 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑥 < 𝑦)) → (𝐹‘𝑥) < (𝐹‘𝑦)) | |
| 18 | 1, 2, 11, 12, 13, 14, 15, 16, 17, 3, 7 | ivthinclemlm 15516 | . 2 ⊢ (𝜑 → ∃𝑞 ∈ (𝐴[,]𝐵)𝑞 ∈ 𝐿) |
| 19 | 1, 2, 11, 12, 13, 14, 15, 16, 17, 3, 7 | ivthinclemum 15517 | . 2 ⊢ (𝜑 → ∃𝑟 ∈ (𝐴[,]𝐵)𝑟 ∈ 𝑅) |
| 20 | 1, 2, 11, 12, 13, 14, 15, 16, 17, 3, 7 | ivthinclemlr 15519 | . 2 ⊢ (𝜑 → ∀𝑞 ∈ (𝐴[,]𝐵)(𝑞 ∈ 𝐿 ↔ ∃𝑟 ∈ 𝐿 𝑞 < 𝑟)) |
| 21 | 1, 2, 11, 12, 13, 14, 15, 16, 17, 3, 7 | ivthinclemur 15521 | . 2 ⊢ (𝜑 → ∀𝑟 ∈ (𝐴[,]𝐵)(𝑟 ∈ 𝑅 ↔ ∃𝑞 ∈ 𝑅 𝑞 < 𝑟)) |
| 22 | 1, 2, 11, 12, 13, 14, 15, 16, 17, 3, 7 | ivthinclemdisj 15522 | . 2 ⊢ (𝜑 → (𝐿 ∩ 𝑅) = ∅) |
| 23 | 1, 2, 11, 12, 13, 14, 15, 16, 17, 3, 7 | ivthinclemloc 15523 | . 2 ⊢ (𝜑 → ∀𝑞 ∈ (𝐴[,]𝐵)∀𝑟 ∈ (𝐴[,]𝐵)(𝑞 < 𝑟 → (𝑞 ∈ 𝐿 ∨ 𝑟 ∈ 𝑅))) |
| 24 | 1, 2, 6, 10, 18, 19, 20, 21, 22, 23, 12 | dedekindicc 15515 | 1 ⊢ (𝜑 → ∃!𝑧 ∈ (𝐴(,)𝐵)(∀𝑞 ∈ 𝐿 𝑞 < 𝑧 ∧ ∀𝑟 ∈ 𝑅 𝑧 < 𝑟)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 = wceq 1398 ∈ wcel 2205 ∀wral 2522 ∃!wreu 2524 {crab 2526 ⊆ wss 3213 class class class wbr 4111 ‘cfv 5354 (class class class)co 6052 ℂcc 8127 ℝcr 8128 < clt 8310 (,)cioo 10224 [,]cicc 10227 –cn→ccncf 15452 |
| 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 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2207 ax-14 2208 ax-ext 2216 ax-coll 4227 ax-sep 4230 ax-nul 4238 ax-pow 4289 ax-pr 4324 ax-un 4556 ax-setind 4661 ax-iinf 4712 ax-cnex 8220 ax-resscn 8221 ax-1cn 8222 ax-1re 8223 ax-icn 8224 ax-addcl 8225 ax-addrcl 8226 ax-mulcl 8227 ax-mulrcl 8228 ax-addcom 8229 ax-mulcom 8230 ax-addass 8231 ax-mulass 8232 ax-distr 8233 ax-i2m1 8234 ax-0lt1 8235 ax-1rid 8236 ax-0id 8237 ax-rnegex 8238 ax-precex 8239 ax-cnre 8240 ax-pre-ltirr 8241 ax-pre-ltwlin 8242 ax-pre-lttrn 8243 ax-pre-apti 8244 ax-pre-ltadd 8245 ax-pre-mulgt0 8246 ax-pre-mulext 8247 ax-arch 8248 ax-caucvg 8249 ax-pre-suploc 8250 |
| This theorem depends on definitions: df-bi 117 df-dc 843 df-3or 1006 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2085 df-mo 2086 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ne 2415 df-nel 2510 df-ral 2527 df-rex 2528 df-reu 2529 df-rmo 2530 df-rab 2531 df-v 2817 df-sbc 3045 df-csb 3141 df-dif 3215 df-un 3217 df-in 3219 df-ss 3226 df-nul 3511 df-if 3623 df-pw 3673 df-sn 3697 df-pr 3698 df-op 3700 df-uni 3917 df-int 3952 df-iun 3995 df-br 4112 df-opab 4174 df-mpt 4175 df-tr 4211 df-id 4416 df-po 4419 df-iso 4420 df-iord 4489 df-on 4491 df-ilim 4492 df-suc 4494 df-iom 4715 df-xp 4757 df-rel 4758 df-cnv 4759 df-co 4760 df-dm 4761 df-rn 4762 df-res 4763 df-ima 4764 df-iota 5314 df-fun 5356 df-fn 5357 df-f 5358 df-f1 5359 df-fo 5360 df-f1o 5361 df-fv 5362 df-isom 5363 df-riota 6005 df-ov 6055 df-oprab 6056 df-mpo 6057 df-1st 6336 df-2nd 6337 df-recs 6538 df-frec 6624 df-map 6886 df-sup 7277 df-inf 7278 df-pnf 8312 df-mnf 8313 df-xr 8314 df-ltxr 8315 df-le 8316 df-sub 8448 df-neg 8449 df-reap 8851 df-ap 8858 df-div 8949 df-inn 9240 df-2 9298 df-3 9299 df-4 9300 df-n0 9499 df-z 9580 df-uz 9857 df-rp 9990 df-ioo 10228 df-icc 10231 df-seqfrec 10814 df-exp 10905 df-cj 11531 df-re 11532 df-im 11533 df-rsqrt 11687 df-abs 11688 df-cncf 15453 |
| This theorem is referenced by: ivthinc 15525 |
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