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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 7538 | . . 3 ⊢ (𝐴 ∈ Q → (∃𝑞 ∈ Q 𝑞 ∈ {𝑥 ∣ 𝑥 <Q 𝐴} ∧ ∃𝑟 ∈ Q 𝑟 ∈ {𝑥 ∣ 𝐴 <Q 𝑥})) | |
2 | ltrelnq 7361 | . . . . . . 7 ⊢ <Q ⊆ (Q × Q) | |
3 | 2 | brel 4677 | . . . . . 6 ⊢ (𝑥 <Q 𝐴 → (𝑥 ∈ Q ∧ 𝐴 ∈ Q)) |
4 | 3 | simpld 112 | . . . . 5 ⊢ (𝑥 <Q 𝐴 → 𝑥 ∈ Q) |
5 | 4 | abssi 3230 | . . . 4 ⊢ {𝑥 ∣ 𝑥 <Q 𝐴} ⊆ Q |
6 | 2 | brel 4677 | . . . . . 6 ⊢ (𝐴 <Q 𝑥 → (𝐴 ∈ Q ∧ 𝑥 ∈ Q)) |
7 | 6 | simprd 114 | . . . . 5 ⊢ (𝐴 <Q 𝑥 → 𝑥 ∈ Q) |
8 | 7 | abssi 3230 | . . . 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 7539 | . . 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 7540 | . . 3 ⊢ (𝐴 ∈ Q → ∀𝑞 ∈ Q ¬ (𝑞 ∈ {𝑥 ∣ 𝑥 <Q 𝐴} ∧ 𝑞 ∈ {𝑥 ∣ 𝐴 <Q 𝑥})) | |
13 | nqprloc 7541 | . . 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 1177 | . 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 7470 | . 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 708 ∧ w3a 978 ∈ wcel 2148 {cab 2163 ∀wral 2455 ∃wrex 2456 ⊆ wss 3129 ⟨cop 3595 class class class wbr 4002 Qcnq 7276 <Q cltq 7281 Pcnp 7287 |
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 614 ax-in2 615 ax-io 709 ax-5 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-10 1505 ax-11 1506 ax-i12 1507 ax-bndl 1509 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-i5r 1535 ax-13 2150 ax-14 2151 ax-ext 2159 ax-coll 4117 ax-sep 4120 ax-nul 4128 ax-pow 4173 ax-pr 4208 ax-un 4432 ax-setind 4535 ax-iinf 4586 |
This theorem depends on definitions: df-bi 117 df-dc 835 df-3or 979 df-3an 980 df-tru 1356 df-fal 1359 df-nf 1461 df-sb 1763 df-eu 2029 df-mo 2030 df-clab 2164 df-cleq 2170 df-clel 2173 df-nfc 2308 df-ne 2348 df-ral 2460 df-rex 2461 df-reu 2462 df-rab 2464 df-v 2739 df-sbc 2963 df-csb 3058 df-dif 3131 df-un 3133 df-in 3135 df-ss 3142 df-nul 3423 df-pw 3577 df-sn 3598 df-pr 3599 df-op 3601 df-uni 3810 df-int 3845 df-iun 3888 df-br 4003 df-opab 4064 df-mpt 4065 df-tr 4101 df-eprel 4288 df-id 4292 df-po 4295 df-iso 4296 df-iord 4365 df-on 4367 df-suc 4370 df-iom 4589 df-xp 4631 df-rel 4632 df-cnv 4633 df-co 4634 df-dm 4635 df-rn 4636 df-res 4637 df-ima 4638 df-iota 5177 df-fun 5217 df-fn 5218 df-f 5219 df-f1 5220 df-fo 5221 df-f1o 5222 df-fv 5223 df-ov 5875 df-oprab 5876 df-mpo 5877 df-1st 6138 df-2nd 6139 df-recs 6303 df-irdg 6368 df-1o 6414 df-oadd 6418 df-omul 6419 df-er 6532 df-ec 6534 df-qs 6538 df-ni 7300 df-pli 7301 df-mi 7302 df-lti 7303 df-plpq 7340 df-mpq 7341 df-enq 7343 df-nqqs 7344 df-plqqs 7345 df-mqqs 7346 df-1nqqs 7347 df-rq 7348 df-ltnqqs 7349 df-inp 7462 |
This theorem is referenced by: nqprlu 7543 |
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