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| Mirrors > Home > ILE Home > Th. List > nqprdisj | GIF version | ||
| Description: A cut produced from a rational is disjoint. Lemma for nqprlu 7908. (Contributed by Jim Kingdon, 8-Dec-2019.) |
| Ref | Expression |
|---|---|
| nqprdisj | ⊢ (𝐴 ∈ Q → ∀𝑞 ∈ Q ¬ (𝑞 ∈ {𝑥 ∣ 𝑥 <Q 𝐴} ∧ 𝑞 ∈ {𝑥 ∣ 𝐴 <Q 𝑥})) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ltsonq 7759 | . . . . 5 ⊢ <Q Or Q | |
| 2 | ltrelnq 7726 | . . . . 5 ⊢ <Q ⊆ (Q × Q) | |
| 3 | 1, 2 | son2lpi 5182 | . . . 4 ⊢ ¬ (𝑞 <Q 𝐴 ∧ 𝐴 <Q 𝑞) |
| 4 | vex 2824 | . . . . . 6 ⊢ 𝑞 ∈ V | |
| 5 | breq1 4131 | . . . . . 6 ⊢ (𝑥 = 𝑞 → (𝑥 <Q 𝐴 ↔ 𝑞 <Q 𝐴)) | |
| 6 | 4, 5 | elab 2970 | . . . . 5 ⊢ (𝑞 ∈ {𝑥 ∣ 𝑥 <Q 𝐴} ↔ 𝑞 <Q 𝐴) |
| 7 | breq2 4132 | . . . . . 6 ⊢ (𝑥 = 𝑞 → (𝐴 <Q 𝑥 ↔ 𝐴 <Q 𝑞)) | |
| 8 | 4, 7 | elab 2970 | . . . . 5 ⊢ (𝑞 ∈ {𝑥 ∣ 𝐴 <Q 𝑥} ↔ 𝐴 <Q 𝑞) |
| 9 | 6, 8 | anbi12i 464 | . . . 4 ⊢ ((𝑞 ∈ {𝑥 ∣ 𝑥 <Q 𝐴} ∧ 𝑞 ∈ {𝑥 ∣ 𝐴 <Q 𝑥}) ↔ (𝑞 <Q 𝐴 ∧ 𝐴 <Q 𝑞)) |
| 10 | 3, 9 | mtbir 682 | . . 3 ⊢ ¬ (𝑞 ∈ {𝑥 ∣ 𝑥 <Q 𝐴} ∧ 𝑞 ∈ {𝑥 ∣ 𝐴 <Q 𝑥}) |
| 11 | 10 | rgenw 2605 | . 2 ⊢ ∀𝑞 ∈ Q ¬ (𝑞 ∈ {𝑥 ∣ 𝑥 <Q 𝐴} ∧ 𝑞 ∈ {𝑥 ∣ 𝐴 <Q 𝑥}) |
| 12 | 11 | a1i 9 | 1 ⊢ (𝐴 ∈ Q → ∀𝑞 ∈ Q ¬ (𝑞 ∈ {𝑥 ∣ 𝑥 <Q 𝐴} ∧ 𝑞 ∈ {𝑥 ∣ 𝐴 <Q 𝑥})) |
| Colors of variables: wff set class |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 104 ∈ wcel 2209 {cab 2224 ∀wral 2528 class class class wbr 4128 Qcnq 7641 <Q cltq 7646 |
| 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 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-coll 4244 ax-sep 4247 ax-nul 4257 ax-pow 4309 ax-pr 4344 ax-un 4576 ax-setind 4682 ax-iinf 4733 |
| This theorem depends on definitions: df-bi 117 df-dc 847 df-3or 1010 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-ral 2533 df-rex 2534 df-reu 2535 df-rab 2537 df-v 2823 df-sbc 3052 df-csb 3148 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-nul 3521 df-pw 3690 df-sn 3714 df-pr 3715 df-op 3717 df-uni 3934 df-int 3969 df-iun 4012 df-br 4129 df-opab 4191 df-mpt 4192 df-tr 4228 df-eprel 4432 df-id 4436 df-po 4439 df-iso 4440 df-iord 4509 df-on 4511 df-suc 4514 df-iom 4736 df-xp 4778 df-rel 4779 df-cnv 4780 df-co 4781 df-dm 4782 df-rn 4783 df-res 4784 df-ima 4785 df-iota 5335 df-fun 5377 df-fn 5378 df-f 5379 df-f1 5380 df-fo 5381 df-f1o 5382 df-fv 5383 df-ov 6082 df-oprab 6083 df-mpo 6084 df-1st 6368 df-2nd 6369 df-recs 6570 df-irdg 6635 df-oadd 6685 df-omul 6686 df-er 6801 df-ec 6803 df-qs 6807 df-ni 7665 df-mi 7667 df-lti 7668 df-enq 7708 df-nqqs 7709 df-ltnqqs 7714 |
| This theorem is referenced by: nqprxx 7907 |
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