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| Mirrors > Home > ILE Home > Th. List > ivthinclemex | GIF version | ||
| Description: Lemma for ivthinc 15360. 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 3310 | . . . 4 ⊢ {𝑤 ∈ (𝐴[,]𝐵) ∣ (𝐹‘𝑤) < 𝑈} ⊆ (𝐴[,]𝐵) | |
| 5 | 3, 4 | eqsstri 3257 | . . 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 3310 | . . . 4 ⊢ {𝑤 ∈ (𝐴[,]𝐵) ∣ 𝑈 < (𝐹‘𝑤)} ⊆ (𝐴[,]𝐵) | |
| 9 | 7, 8 | eqsstri 3257 | . . 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 15351 | . 2 ⊢ (𝜑 → ∃𝑞 ∈ (𝐴[,]𝐵)𝑞 ∈ 𝐿) |
| 19 | 1, 2, 11, 12, 13, 14, 15, 16, 17, 3, 7 | ivthinclemum 15352 | . 2 ⊢ (𝜑 → ∃𝑟 ∈ (𝐴[,]𝐵)𝑟 ∈ 𝑅) |
| 20 | 1, 2, 11, 12, 13, 14, 15, 16, 17, 3, 7 | ivthinclemlr 15354 | . 2 ⊢ (𝜑 → ∀𝑞 ∈ (𝐴[,]𝐵)(𝑞 ∈ 𝐿 ↔ ∃𝑟 ∈ 𝐿 𝑞 < 𝑟)) |
| 21 | 1, 2, 11, 12, 13, 14, 15, 16, 17, 3, 7 | ivthinclemur 15356 | . 2 ⊢ (𝜑 → ∀𝑟 ∈ (𝐴[,]𝐵)(𝑟 ∈ 𝑅 ↔ ∃𝑞 ∈ 𝑅 𝑞 < 𝑟)) |
| 22 | 1, 2, 11, 12, 13, 14, 15, 16, 17, 3, 7 | ivthinclemdisj 15357 | . 2 ⊢ (𝜑 → (𝐿 ∩ 𝑅) = ∅) |
| 23 | 1, 2, 11, 12, 13, 14, 15, 16, 17, 3, 7 | ivthinclemloc 15358 | . 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 15350 | 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 1395 ∈ wcel 2200 ∀wral 2508 ∃!wreu 2510 {crab 2512 ⊆ wss 3198 class class class wbr 4086 ‘cfv 5324 (class class class)co 6013 ℂcc 8023 ℝcr 8024 < clt 8207 (,)cioo 10116 [,]cicc 10119 –cn→ccncf 15287 |
| 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 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-coll 4202 ax-sep 4205 ax-nul 4213 ax-pow 4262 ax-pr 4297 ax-un 4528 ax-setind 4633 ax-iinf 4684 ax-cnex 8116 ax-resscn 8117 ax-1cn 8118 ax-1re 8119 ax-icn 8120 ax-addcl 8121 ax-addrcl 8122 ax-mulcl 8123 ax-mulrcl 8124 ax-addcom 8125 ax-mulcom 8126 ax-addass 8127 ax-mulass 8128 ax-distr 8129 ax-i2m1 8130 ax-0lt1 8131 ax-1rid 8132 ax-0id 8133 ax-rnegex 8134 ax-precex 8135 ax-cnre 8136 ax-pre-ltirr 8137 ax-pre-ltwlin 8138 ax-pre-lttrn 8139 ax-pre-apti 8140 ax-pre-ltadd 8141 ax-pre-mulgt0 8142 ax-pre-mulext 8143 ax-arch 8144 ax-caucvg 8145 ax-pre-suploc 8146 |
| This theorem depends on definitions: df-bi 117 df-dc 840 df-3or 1003 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-nel 2496 df-ral 2513 df-rex 2514 df-reu 2515 df-rmo 2516 df-rab 2517 df-v 2802 df-sbc 3030 df-csb 3126 df-dif 3200 df-un 3202 df-in 3204 df-ss 3211 df-nul 3493 df-if 3604 df-pw 3652 df-sn 3673 df-pr 3674 df-op 3676 df-uni 3892 df-int 3927 df-iun 3970 df-br 4087 df-opab 4149 df-mpt 4150 df-tr 4186 df-id 4388 df-po 4391 df-iso 4392 df-iord 4461 df-on 4463 df-ilim 4464 df-suc 4466 df-iom 4687 df-xp 4729 df-rel 4730 df-cnv 4731 df-co 4732 df-dm 4733 df-rn 4734 df-res 4735 df-ima 4736 df-iota 5284 df-fun 5326 df-fn 5327 df-f 5328 df-f1 5329 df-fo 5330 df-f1o 5331 df-fv 5332 df-isom 5333 df-riota 5966 df-ov 6016 df-oprab 6017 df-mpo 6018 df-1st 6298 df-2nd 6299 df-recs 6466 df-frec 6552 df-map 6814 df-sup 7177 df-inf 7178 df-pnf 8209 df-mnf 8210 df-xr 8211 df-ltxr 8212 df-le 8213 df-sub 8345 df-neg 8346 df-reap 8748 df-ap 8755 df-div 8846 df-inn 9137 df-2 9195 df-3 9196 df-4 9197 df-n0 9396 df-z 9473 df-uz 9749 df-rp 9882 df-ioo 10120 df-icc 10123 df-seqfrec 10703 df-exp 10794 df-cj 11396 df-re 11397 df-im 11398 df-rsqrt 11552 df-abs 11553 df-cncf 15288 |
| This theorem is referenced by: ivthinc 15360 |
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