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Mirrors > Home > ILE Home > Th. List > prnmaddl | GIF version |
Description: A lower cut has no largest member. Addition version. (Contributed by Jim Kingdon, 29-Sep-2019.) |
Ref | Expression |
---|---|
prnmaddl | ⊢ ((〈𝐿, 𝑈〉 ∈ P ∧ 𝐵 ∈ 𝐿) → ∃𝑥 ∈ Q (𝐵 +Q 𝑥) ∈ 𝐿) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | prnmaxl 6948 | . 2 ⊢ ((〈𝐿, 𝑈〉 ∈ P ∧ 𝐵 ∈ 𝐿) → ∃𝑦 ∈ 𝐿 𝐵 <Q 𝑦) | |
2 | ltexnqi 6869 | . . . 4 ⊢ (𝐵 <Q 𝑦 → ∃𝑥 ∈ Q (𝐵 +Q 𝑥) = 𝑦) | |
3 | eleq1a 2154 | . . . . 5 ⊢ (𝑦 ∈ 𝐿 → ((𝐵 +Q 𝑥) = 𝑦 → (𝐵 +Q 𝑥) ∈ 𝐿)) | |
4 | 3 | reximdv 2468 | . . . 4 ⊢ (𝑦 ∈ 𝐿 → (∃𝑥 ∈ Q (𝐵 +Q 𝑥) = 𝑦 → ∃𝑥 ∈ Q (𝐵 +Q 𝑥) ∈ 𝐿)) |
5 | 2, 4 | syl5 32 | . . 3 ⊢ (𝑦 ∈ 𝐿 → (𝐵 <Q 𝑦 → ∃𝑥 ∈ Q (𝐵 +Q 𝑥) ∈ 𝐿)) |
6 | 5 | rexlimiv 2477 | . 2 ⊢ (∃𝑦 ∈ 𝐿 𝐵 <Q 𝑦 → ∃𝑥 ∈ Q (𝐵 +Q 𝑥) ∈ 𝐿) |
7 | 1, 6 | syl 14 | 1 ⊢ ((〈𝐿, 𝑈〉 ∈ P ∧ 𝐵 ∈ 𝐿) → ∃𝑥 ∈ Q (𝐵 +Q 𝑥) ∈ 𝐿) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 102 = wceq 1285 ∈ wcel 1434 ∃wrex 2354 〈cop 3425 class class class wbr 3811 (class class class)co 5589 Qcnq 6740 +Q cplq 6742 <Q cltq 6745 Pcnp 6751 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-in1 577 ax-in2 578 ax-io 663 ax-5 1377 ax-7 1378 ax-gen 1379 ax-ie1 1423 ax-ie2 1424 ax-8 1436 ax-10 1437 ax-11 1438 ax-i12 1439 ax-bndl 1440 ax-4 1441 ax-13 1445 ax-14 1446 ax-17 1460 ax-i9 1464 ax-ial 1468 ax-i5r 1469 ax-ext 2065 ax-coll 3919 ax-sep 3922 ax-nul 3930 ax-pow 3974 ax-pr 3999 ax-un 4223 ax-setind 4315 ax-iinf 4365 |
This theorem depends on definitions: df-bi 115 df-dc 777 df-3or 921 df-3an 922 df-tru 1288 df-fal 1291 df-nf 1391 df-sb 1688 df-eu 1946 df-mo 1947 df-clab 2070 df-cleq 2076 df-clel 2079 df-nfc 2212 df-ne 2250 df-ral 2358 df-rex 2359 df-reu 2360 df-rab 2362 df-v 2614 df-sbc 2827 df-csb 2920 df-dif 2986 df-un 2988 df-in 2990 df-ss 2997 df-nul 3270 df-pw 3408 df-sn 3428 df-pr 3429 df-op 3431 df-uni 3628 df-int 3663 df-iun 3706 df-br 3812 df-opab 3866 df-mpt 3867 df-tr 3902 df-eprel 4079 df-id 4083 df-iord 4156 df-on 4158 df-suc 4161 df-iom 4368 df-xp 4405 df-rel 4406 df-cnv 4407 df-co 4408 df-dm 4409 df-rn 4410 df-res 4411 df-ima 4412 df-iota 4932 df-fun 4969 df-fn 4970 df-f 4971 df-f1 4972 df-fo 4973 df-f1o 4974 df-fv 4975 df-ov 5592 df-oprab 5593 df-mpt2 5594 df-1st 5844 df-2nd 5845 df-recs 6000 df-irdg 6065 df-1o 6111 df-oadd 6115 df-omul 6116 df-er 6220 df-ec 6222 df-qs 6226 df-ni 6764 df-pli 6765 df-mi 6766 df-lti 6767 df-plpq 6804 df-mpq 6805 df-enq 6807 df-nqqs 6808 df-plqqs 6809 df-mqqs 6810 df-1nqqs 6811 df-ltnqqs 6813 df-inp 6926 |
This theorem is referenced by: ltexprlemrl 7070 addcanprleml 7074 |
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