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Mirrors > Home > MPE Home > Th. List > ltexprlem2 | Structured version Visualization version GIF version |
Description: Lemma for Proposition 9-3.5(iv) of [Gleason] p. 123. (Contributed by NM, 3-Apr-1996.) (New usage is discouraged.) |
Ref | Expression |
---|---|
ltexprlem.1 | ⊢ 𝐶 = {𝑥 ∣ ∃𝑦(¬ 𝑦 ∈ 𝐴 ∧ (𝑦 +Q 𝑥) ∈ 𝐵)} |
Ref | Expression |
---|---|
ltexprlem2 | ⊢ (𝐵 ∈ P → 𝐶 ⊊ Q) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ltexprlem.1 | . . . . 5 ⊢ 𝐶 = {𝑥 ∣ ∃𝑦(¬ 𝑦 ∈ 𝐴 ∧ (𝑦 +Q 𝑥) ∈ 𝐵)} | |
2 | 1 | abeq2i 2887 | . . . 4 ⊢ (𝑥 ∈ 𝐶 ↔ ∃𝑦(¬ 𝑦 ∈ 𝐴 ∧ (𝑦 +Q 𝑥) ∈ 𝐵)) |
3 | elprnq 10456 | . . . . . . . . 9 ⊢ ((𝐵 ∈ P ∧ (𝑦 +Q 𝑥) ∈ 𝐵) → (𝑦 +Q 𝑥) ∈ Q) | |
4 | addnqf 10413 | . . . . . . . . . . 11 ⊢ +Q :(Q × Q)⟶Q | |
5 | 4 | fdmi 6513 | . . . . . . . . . 10 ⊢ dom +Q = (Q × Q) |
6 | 0nnq 10389 | . . . . . . . . . 10 ⊢ ¬ ∅ ∈ Q | |
7 | 5, 6 | ndmovrcl 7335 | . . . . . . . . 9 ⊢ ((𝑦 +Q 𝑥) ∈ Q → (𝑦 ∈ Q ∧ 𝑥 ∈ Q)) |
8 | 3, 7 | syl 17 | . . . . . . . 8 ⊢ ((𝐵 ∈ P ∧ (𝑦 +Q 𝑥) ∈ 𝐵) → (𝑦 ∈ Q ∧ 𝑥 ∈ Q)) |
9 | ltaddnq 10439 | . . . . . . . . . . 11 ⊢ ((𝑥 ∈ Q ∧ 𝑦 ∈ Q) → 𝑥 <Q (𝑥 +Q 𝑦)) | |
10 | 9 | ancoms 462 | . . . . . . . . . 10 ⊢ ((𝑦 ∈ Q ∧ 𝑥 ∈ Q) → 𝑥 <Q (𝑥 +Q 𝑦)) |
11 | addcomnq 10416 | . . . . . . . . . 10 ⊢ (𝑥 +Q 𝑦) = (𝑦 +Q 𝑥) | |
12 | 10, 11 | breqtrdi 5076 | . . . . . . . . 9 ⊢ ((𝑦 ∈ Q ∧ 𝑥 ∈ Q) → 𝑥 <Q (𝑦 +Q 𝑥)) |
13 | prcdnq 10458 | . . . . . . . . 9 ⊢ ((𝐵 ∈ P ∧ (𝑦 +Q 𝑥) ∈ 𝐵) → (𝑥 <Q (𝑦 +Q 𝑥) → 𝑥 ∈ 𝐵)) | |
14 | 12, 13 | syl5 34 | . . . . . . . 8 ⊢ ((𝐵 ∈ P ∧ (𝑦 +Q 𝑥) ∈ 𝐵) → ((𝑦 ∈ Q ∧ 𝑥 ∈ Q) → 𝑥 ∈ 𝐵)) |
15 | 8, 14 | mpd 15 | . . . . . . 7 ⊢ ((𝐵 ∈ P ∧ (𝑦 +Q 𝑥) ∈ 𝐵) → 𝑥 ∈ 𝐵) |
16 | 15 | ex 416 | . . . . . 6 ⊢ (𝐵 ∈ P → ((𝑦 +Q 𝑥) ∈ 𝐵 → 𝑥 ∈ 𝐵)) |
17 | 16 | adantld 494 | . . . . 5 ⊢ (𝐵 ∈ P → ((¬ 𝑦 ∈ 𝐴 ∧ (𝑦 +Q 𝑥) ∈ 𝐵) → 𝑥 ∈ 𝐵)) |
18 | 17 | exlimdv 1934 | . . . 4 ⊢ (𝐵 ∈ P → (∃𝑦(¬ 𝑦 ∈ 𝐴 ∧ (𝑦 +Q 𝑥) ∈ 𝐵) → 𝑥 ∈ 𝐵)) |
19 | 2, 18 | syl5bi 245 | . . 3 ⊢ (𝐵 ∈ P → (𝑥 ∈ 𝐶 → 𝑥 ∈ 𝐵)) |
20 | 19 | ssrdv 3900 | . 2 ⊢ (𝐵 ∈ P → 𝐶 ⊆ 𝐵) |
21 | prpssnq 10455 | . 2 ⊢ (𝐵 ∈ P → 𝐵 ⊊ Q) | |
22 | 20, 21 | sspsstrd 4016 | 1 ⊢ (𝐵 ∈ P → 𝐶 ⊊ Q) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 399 = wceq 1538 ∃wex 1781 ∈ wcel 2111 {cab 2735 ⊊ wpss 3861 class class class wbr 5035 × cxp 5525 (class class class)co 7155 Qcnq 10317 +Q cplq 10320 <Q cltq 10323 Pcnp 10324 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2729 ax-sep 5172 ax-nul 5179 ax-pr 5301 ax-un 7464 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3or 1085 df-3an 1086 df-tru 1541 df-fal 1551 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2557 df-eu 2588 df-clab 2736 df-cleq 2750 df-clel 2830 df-nfc 2901 df-ne 2952 df-ral 3075 df-rex 3076 df-reu 3077 df-rmo 3078 df-rab 3079 df-v 3411 df-sbc 3699 df-csb 3808 df-dif 3863 df-un 3865 df-in 3867 df-ss 3877 df-pss 3879 df-nul 4228 df-if 4424 df-pw 4499 df-sn 4526 df-pr 4528 df-tp 4530 df-op 4532 df-uni 4802 df-iun 4888 df-br 5036 df-opab 5098 df-mpt 5116 df-tr 5142 df-id 5433 df-eprel 5438 df-po 5446 df-so 5447 df-fr 5486 df-we 5488 df-xp 5533 df-rel 5534 df-cnv 5535 df-co 5536 df-dm 5537 df-rn 5538 df-res 5539 df-ima 5540 df-pred 6130 df-ord 6176 df-on 6177 df-lim 6178 df-suc 6179 df-iota 6298 df-fun 6341 df-fn 6342 df-f 6343 df-f1 6344 df-fo 6345 df-f1o 6346 df-fv 6347 df-ov 7158 df-oprab 7159 df-mpo 7160 df-om 7585 df-1st 7698 df-2nd 7699 df-wrecs 7962 df-recs 8023 df-rdg 8061 df-1o 8117 df-oadd 8121 df-omul 8122 df-er 8304 df-ni 10337 df-pli 10338 df-mi 10339 df-lti 10340 df-plpq 10373 df-mpq 10374 df-ltpq 10375 df-enq 10376 df-nq 10377 df-erq 10378 df-plq 10379 df-mq 10380 df-1nq 10381 df-ltnq 10383 df-np 10446 |
This theorem is referenced by: ltexprlem5 10505 |
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