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| Mirrors > Home > ILE Home > Th. List > nqprxx | GIF version | ||
| Description: The canonical embedding of the rationals into the reals, expressed with the same variable for the lower and upper cuts. (Contributed by Jim Kingdon, 8-Dec-2019.) |
| Ref | Expression |
|---|---|
| nqprxx | ⊢ (𝐴 ∈ Q → 〈{𝑥 ∣ 𝑥 <Q 𝐴}, {𝑥 ∣ 𝐴 <Q 𝑥}〉 ∈ P) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nqprm 7857 | . . 3 ⊢ (𝐴 ∈ Q → (∃𝑞 ∈ Q 𝑞 ∈ {𝑥 ∣ 𝑥 <Q 𝐴} ∧ ∃𝑟 ∈ Q 𝑟 ∈ {𝑥 ∣ 𝐴 <Q 𝑥})) | |
| 2 | ltrelnq 7680 | . . . . . . 7 ⊢ <Q ⊆ (Q × Q) | |
| 3 | 2 | brel 4802 | . . . . . 6 ⊢ (𝑥 <Q 𝐴 → (𝑥 ∈ Q ∧ 𝐴 ∈ Q)) |
| 4 | 3 | simpld 112 | . . . . 5 ⊢ (𝑥 <Q 𝐴 → 𝑥 ∈ Q) |
| 5 | 4 | abssi 3313 | . . . 4 ⊢ {𝑥 ∣ 𝑥 <Q 𝐴} ⊆ Q |
| 6 | 2 | brel 4802 | . . . . . 6 ⊢ (𝐴 <Q 𝑥 → (𝐴 ∈ Q ∧ 𝑥 ∈ Q)) |
| 7 | 6 | simprd 114 | . . . . 5 ⊢ (𝐴 <Q 𝑥 → 𝑥 ∈ Q) |
| 8 | 7 | abssi 3313 | . . . 4 ⊢ {𝑥 ∣ 𝐴 <Q 𝑥} ⊆ Q |
| 9 | 5, 8 | pm3.2i 272 | . . 3 ⊢ ({𝑥 ∣ 𝑥 <Q 𝐴} ⊆ Q ∧ {𝑥 ∣ 𝐴 <Q 𝑥} ⊆ Q) |
| 10 | 1, 9 | jctil 312 | . 2 ⊢ (𝐴 ∈ Q → (({𝑥 ∣ 𝑥 <Q 𝐴} ⊆ Q ∧ {𝑥 ∣ 𝐴 <Q 𝑥} ⊆ Q) ∧ (∃𝑞 ∈ Q 𝑞 ∈ {𝑥 ∣ 𝑥 <Q 𝐴} ∧ ∃𝑟 ∈ Q 𝑟 ∈ {𝑥 ∣ 𝐴 <Q 𝑥}))) |
| 11 | nqprrnd 7858 | . . 3 ⊢ (𝐴 ∈ Q → (∀𝑞 ∈ Q (𝑞 ∈ {𝑥 ∣ 𝑥 <Q 𝐴} ↔ ∃𝑟 ∈ Q (𝑞 <Q 𝑟 ∧ 𝑟 ∈ {𝑥 ∣ 𝑥 <Q 𝐴})) ∧ ∀𝑟 ∈ Q (𝑟 ∈ {𝑥 ∣ 𝐴 <Q 𝑥} ↔ ∃𝑞 ∈ Q (𝑞 <Q 𝑟 ∧ 𝑞 ∈ {𝑥 ∣ 𝐴 <Q 𝑥})))) | |
| 12 | nqprdisj 7859 | . . 3 ⊢ (𝐴 ∈ Q → ∀𝑞 ∈ Q ¬ (𝑞 ∈ {𝑥 ∣ 𝑥 <Q 𝐴} ∧ 𝑞 ∈ {𝑥 ∣ 𝐴 <Q 𝑥})) | |
| 13 | nqprloc 7860 | . . 3 ⊢ (𝐴 ∈ Q → ∀𝑞 ∈ Q ∀𝑟 ∈ Q (𝑞 <Q 𝑟 → (𝑞 ∈ {𝑥 ∣ 𝑥 <Q 𝐴} ∨ 𝑟 ∈ {𝑥 ∣ 𝐴 <Q 𝑥}))) | |
| 14 | 11, 12, 13 | 3jca 1204 | . 2 ⊢ (𝐴 ∈ Q → ((∀𝑞 ∈ Q (𝑞 ∈ {𝑥 ∣ 𝑥 <Q 𝐴} ↔ ∃𝑟 ∈ Q (𝑞 <Q 𝑟 ∧ 𝑟 ∈ {𝑥 ∣ 𝑥 <Q 𝐴})) ∧ ∀𝑟 ∈ Q (𝑟 ∈ {𝑥 ∣ 𝐴 <Q 𝑥} ↔ ∃𝑞 ∈ Q (𝑞 <Q 𝑟 ∧ 𝑞 ∈ {𝑥 ∣ 𝐴 <Q 𝑥}))) ∧ ∀𝑞 ∈ Q ¬ (𝑞 ∈ {𝑥 ∣ 𝑥 <Q 𝐴} ∧ 𝑞 ∈ {𝑥 ∣ 𝐴 <Q 𝑥}) ∧ ∀𝑞 ∈ Q ∀𝑟 ∈ Q (𝑞 <Q 𝑟 → (𝑞 ∈ {𝑥 ∣ 𝑥 <Q 𝐴} ∨ 𝑟 ∈ {𝑥 ∣ 𝐴 <Q 𝑥})))) |
| 15 | elinp 7789 | . 2 ⊢ (〈{𝑥 ∣ 𝑥 <Q 𝐴}, {𝑥 ∣ 𝐴 <Q 𝑥}〉 ∈ P ↔ ((({𝑥 ∣ 𝑥 <Q 𝐴} ⊆ Q ∧ {𝑥 ∣ 𝐴 <Q 𝑥} ⊆ Q) ∧ (∃𝑞 ∈ Q 𝑞 ∈ {𝑥 ∣ 𝑥 <Q 𝐴} ∧ ∃𝑟 ∈ Q 𝑟 ∈ {𝑥 ∣ 𝐴 <Q 𝑥})) ∧ ((∀𝑞 ∈ Q (𝑞 ∈ {𝑥 ∣ 𝑥 <Q 𝐴} ↔ ∃𝑟 ∈ Q (𝑞 <Q 𝑟 ∧ 𝑟 ∈ {𝑥 ∣ 𝑥 <Q 𝐴})) ∧ ∀𝑟 ∈ Q (𝑟 ∈ {𝑥 ∣ 𝐴 <Q 𝑥} ↔ ∃𝑞 ∈ Q (𝑞 <Q 𝑟 ∧ 𝑞 ∈ {𝑥 ∣ 𝐴 <Q 𝑥}))) ∧ ∀𝑞 ∈ Q ¬ (𝑞 ∈ {𝑥 ∣ 𝑥 <Q 𝐴} ∧ 𝑞 ∈ {𝑥 ∣ 𝐴 <Q 𝑥}) ∧ ∀𝑞 ∈ Q ∀𝑟 ∈ Q (𝑞 <Q 𝑟 → (𝑞 ∈ {𝑥 ∣ 𝑥 <Q 𝐴} ∨ 𝑟 ∈ {𝑥 ∣ 𝐴 <Q 𝑥}))))) | |
| 16 | 10, 14, 15 | sylanbrc 417 | 1 ⊢ (𝐴 ∈ Q → 〈{𝑥 ∣ 𝑥 <Q 𝐴}, {𝑥 ∣ 𝐴 <Q 𝑥}〉 ∈ P) |
| Colors of variables: wff set class |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 104 ↔ wb 105 ∨ wo 716 ∧ w3a 1005 ∈ wcel 2203 {cab 2218 ∀wral 2520 ∃wrex 2521 ⊆ wss 3211 〈cop 3692 class class class wbr 4109 Qcnq 7595 <Q cltq 7600 Pcnp 7606 |
| 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 2205 ax-14 2206 ax-ext 2214 ax-coll 4225 ax-sep 4228 ax-nul 4236 ax-pow 4287 ax-pr 4322 ax-un 4554 ax-setind 4659 ax-iinf 4710 |
| 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 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ne 2413 df-ral 2525 df-rex 2526 df-reu 2527 df-rab 2529 df-v 2815 df-sbc 3043 df-csb 3139 df-dif 3213 df-un 3215 df-in 3217 df-ss 3224 df-nul 3509 df-pw 3671 df-sn 3695 df-pr 3696 df-op 3698 df-uni 3915 df-int 3950 df-iun 3993 df-br 4110 df-opab 4172 df-mpt 4173 df-tr 4209 df-eprel 4410 df-id 4414 df-po 4417 df-iso 4418 df-iord 4487 df-on 4489 df-suc 4492 df-iom 4713 df-xp 4755 df-rel 4756 df-cnv 4757 df-co 4758 df-dm 4759 df-rn 4760 df-res 4761 df-ima 4762 df-iota 5312 df-fun 5354 df-fn 5355 df-f 5356 df-f1 5357 df-fo 5358 df-f1o 5359 df-fv 5360 df-ov 6053 df-oprab 6054 df-mpo 6055 df-1st 6334 df-2nd 6335 df-recs 6536 df-irdg 6601 df-1o 6647 df-oadd 6651 df-omul 6652 df-er 6767 df-ec 6769 df-qs 6773 df-ni 7619 df-pli 7620 df-mi 7621 df-lti 7622 df-plpq 7659 df-mpq 7660 df-enq 7662 df-nqqs 7663 df-plqqs 7664 df-mqqs 7665 df-1nqqs 7666 df-rq 7667 df-ltnqqs 7668 df-inp 7781 |
| This theorem is referenced by: nqprlu 7862 |
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