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Mirrors > Home > MPE Home > Th. List > bezoutlem2 | Structured version Visualization version GIF version |
Description: Lemma for bezout 16179. (Contributed by Mario Carneiro, 15-Mar-2014.) ( Revised by AV, 30-Sep-2020.) |
Ref | Expression |
---|---|
bezout.1 | ⊢ 𝑀 = {𝑧 ∈ ℕ ∣ ∃𝑥 ∈ ℤ ∃𝑦 ∈ ℤ 𝑧 = ((𝐴 · 𝑥) + (𝐵 · 𝑦))} |
bezout.3 | ⊢ (𝜑 → 𝐴 ∈ ℤ) |
bezout.4 | ⊢ (𝜑 → 𝐵 ∈ ℤ) |
bezout.2 | ⊢ 𝐺 = inf(𝑀, ℝ, < ) |
bezout.5 | ⊢ (𝜑 → ¬ (𝐴 = 0 ∧ 𝐵 = 0)) |
Ref | Expression |
---|---|
bezoutlem2 | ⊢ (𝜑 → 𝐺 ∈ 𝑀) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | bezout.2 | . 2 ⊢ 𝐺 = inf(𝑀, ℝ, < ) | |
2 | bezout.1 | . . . . 5 ⊢ 𝑀 = {𝑧 ∈ ℕ ∣ ∃𝑥 ∈ ℤ ∃𝑦 ∈ ℤ 𝑧 = ((𝐴 · 𝑥) + (𝐵 · 𝑦))} | |
3 | 2 | ssrab3 4011 | . . . 4 ⊢ 𝑀 ⊆ ℕ |
4 | nnuz 12550 | . . . 4 ⊢ ℕ = (ℤ≥‘1) | |
5 | 3, 4 | sseqtri 3953 | . . 3 ⊢ 𝑀 ⊆ (ℤ≥‘1) |
6 | bezout.3 | . . . . . 6 ⊢ (𝜑 → 𝐴 ∈ ℤ) | |
7 | bezout.4 | . . . . . 6 ⊢ (𝜑 → 𝐵 ∈ ℤ) | |
8 | 2, 6, 7 | bezoutlem1 16175 | . . . . 5 ⊢ (𝜑 → (𝐴 ≠ 0 → (abs‘𝐴) ∈ 𝑀)) |
9 | ne0i 4265 | . . . . 5 ⊢ ((abs‘𝐴) ∈ 𝑀 → 𝑀 ≠ ∅) | |
10 | 8, 9 | syl6 35 | . . . 4 ⊢ (𝜑 → (𝐴 ≠ 0 → 𝑀 ≠ ∅)) |
11 | eqid 2738 | . . . . . . 7 ⊢ {𝑧 ∈ ℕ ∣ ∃𝑦 ∈ ℤ ∃𝑥 ∈ ℤ 𝑧 = ((𝐵 · 𝑦) + (𝐴 · 𝑥))} = {𝑧 ∈ ℕ ∣ ∃𝑦 ∈ ℤ ∃𝑥 ∈ ℤ 𝑧 = ((𝐵 · 𝑦) + (𝐴 · 𝑥))} | |
12 | 11, 7, 6 | bezoutlem1 16175 | . . . . . 6 ⊢ (𝜑 → (𝐵 ≠ 0 → (abs‘𝐵) ∈ {𝑧 ∈ ℕ ∣ ∃𝑦 ∈ ℤ ∃𝑥 ∈ ℤ 𝑧 = ((𝐵 · 𝑦) + (𝐴 · 𝑥))})) |
13 | rexcom 3281 | . . . . . . . . . 10 ⊢ (∃𝑥 ∈ ℤ ∃𝑦 ∈ ℤ 𝑧 = ((𝐴 · 𝑥) + (𝐵 · 𝑦)) ↔ ∃𝑦 ∈ ℤ ∃𝑥 ∈ ℤ 𝑧 = ((𝐴 · 𝑥) + (𝐵 · 𝑦))) | |
14 | 6 | zcnd 12356 | . . . . . . . . . . . . . . 15 ⊢ (𝜑 → 𝐴 ∈ ℂ) |
15 | 14 | adantr 480 | . . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑦 ∈ ℤ ∧ 𝑥 ∈ ℤ)) → 𝐴 ∈ ℂ) |
16 | zcn 12254 | . . . . . . . . . . . . . . 15 ⊢ (𝑥 ∈ ℤ → 𝑥 ∈ ℂ) | |
17 | 16 | ad2antll 725 | . . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑦 ∈ ℤ ∧ 𝑥 ∈ ℤ)) → 𝑥 ∈ ℂ) |
18 | 15, 17 | mulcld 10926 | . . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑦 ∈ ℤ ∧ 𝑥 ∈ ℤ)) → (𝐴 · 𝑥) ∈ ℂ) |
19 | 7 | zcnd 12356 | . . . . . . . . . . . . . . 15 ⊢ (𝜑 → 𝐵 ∈ ℂ) |
20 | 19 | adantr 480 | . . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑦 ∈ ℤ ∧ 𝑥 ∈ ℤ)) → 𝐵 ∈ ℂ) |
21 | zcn 12254 | . . . . . . . . . . . . . . 15 ⊢ (𝑦 ∈ ℤ → 𝑦 ∈ ℂ) | |
22 | 21 | ad2antrl 724 | . . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑦 ∈ ℤ ∧ 𝑥 ∈ ℤ)) → 𝑦 ∈ ℂ) |
23 | 20, 22 | mulcld 10926 | . . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑦 ∈ ℤ ∧ 𝑥 ∈ ℤ)) → (𝐵 · 𝑦) ∈ ℂ) |
24 | 18, 23 | addcomd 11107 | . . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑦 ∈ ℤ ∧ 𝑥 ∈ ℤ)) → ((𝐴 · 𝑥) + (𝐵 · 𝑦)) = ((𝐵 · 𝑦) + (𝐴 · 𝑥))) |
25 | 24 | eqeq2d 2749 | . . . . . . . . . . 11 ⊢ ((𝜑 ∧ (𝑦 ∈ ℤ ∧ 𝑥 ∈ ℤ)) → (𝑧 = ((𝐴 · 𝑥) + (𝐵 · 𝑦)) ↔ 𝑧 = ((𝐵 · 𝑦) + (𝐴 · 𝑥)))) |
26 | 25 | 2rexbidva 3227 | . . . . . . . . . 10 ⊢ (𝜑 → (∃𝑦 ∈ ℤ ∃𝑥 ∈ ℤ 𝑧 = ((𝐴 · 𝑥) + (𝐵 · 𝑦)) ↔ ∃𝑦 ∈ ℤ ∃𝑥 ∈ ℤ 𝑧 = ((𝐵 · 𝑦) + (𝐴 · 𝑥)))) |
27 | 13, 26 | syl5bb 282 | . . . . . . . . 9 ⊢ (𝜑 → (∃𝑥 ∈ ℤ ∃𝑦 ∈ ℤ 𝑧 = ((𝐴 · 𝑥) + (𝐵 · 𝑦)) ↔ ∃𝑦 ∈ ℤ ∃𝑥 ∈ ℤ 𝑧 = ((𝐵 · 𝑦) + (𝐴 · 𝑥)))) |
28 | 27 | rabbidv 3404 | . . . . . . . 8 ⊢ (𝜑 → {𝑧 ∈ ℕ ∣ ∃𝑥 ∈ ℤ ∃𝑦 ∈ ℤ 𝑧 = ((𝐴 · 𝑥) + (𝐵 · 𝑦))} = {𝑧 ∈ ℕ ∣ ∃𝑦 ∈ ℤ ∃𝑥 ∈ ℤ 𝑧 = ((𝐵 · 𝑦) + (𝐴 · 𝑥))}) |
29 | 2, 28 | eqtrid 2790 | . . . . . . 7 ⊢ (𝜑 → 𝑀 = {𝑧 ∈ ℕ ∣ ∃𝑦 ∈ ℤ ∃𝑥 ∈ ℤ 𝑧 = ((𝐵 · 𝑦) + (𝐴 · 𝑥))}) |
30 | 29 | eleq2d 2824 | . . . . . 6 ⊢ (𝜑 → ((abs‘𝐵) ∈ 𝑀 ↔ (abs‘𝐵) ∈ {𝑧 ∈ ℕ ∣ ∃𝑦 ∈ ℤ ∃𝑥 ∈ ℤ 𝑧 = ((𝐵 · 𝑦) + (𝐴 · 𝑥))})) |
31 | 12, 30 | sylibrd 258 | . . . . 5 ⊢ (𝜑 → (𝐵 ≠ 0 → (abs‘𝐵) ∈ 𝑀)) |
32 | ne0i 4265 | . . . . 5 ⊢ ((abs‘𝐵) ∈ 𝑀 → 𝑀 ≠ ∅) | |
33 | 31, 32 | syl6 35 | . . . 4 ⊢ (𝜑 → (𝐵 ≠ 0 → 𝑀 ≠ ∅)) |
34 | bezout.5 | . . . . 5 ⊢ (𝜑 → ¬ (𝐴 = 0 ∧ 𝐵 = 0)) | |
35 | neorian 3038 | . . . . 5 ⊢ ((𝐴 ≠ 0 ∨ 𝐵 ≠ 0) ↔ ¬ (𝐴 = 0 ∧ 𝐵 = 0)) | |
36 | 34, 35 | sylibr 233 | . . . 4 ⊢ (𝜑 → (𝐴 ≠ 0 ∨ 𝐵 ≠ 0)) |
37 | 10, 33, 36 | mpjaod 856 | . . 3 ⊢ (𝜑 → 𝑀 ≠ ∅) |
38 | infssuzcl 12601 | . . 3 ⊢ ((𝑀 ⊆ (ℤ≥‘1) ∧ 𝑀 ≠ ∅) → inf(𝑀, ℝ, < ) ∈ 𝑀) | |
39 | 5, 37, 38 | sylancr 586 | . 2 ⊢ (𝜑 → inf(𝑀, ℝ, < ) ∈ 𝑀) |
40 | 1, 39 | eqeltrid 2843 | 1 ⊢ (𝜑 → 𝐺 ∈ 𝑀) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 ∨ wo 843 = wceq 1539 ∈ wcel 2108 ≠ wne 2942 ∃wrex 3064 {crab 3067 ⊆ wss 3883 ∅c0 4253 ‘cfv 6418 (class class class)co 7255 infcinf 9130 ℂcc 10800 ℝcr 10801 0cc0 10802 1c1 10803 + caddc 10805 · cmul 10807 < clt 10940 ℕcn 11903 ℤcz 12249 ℤ≥cuz 12511 abscabs 14873 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 ax-pre-sup 10880 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-er 8456 df-en 8692 df-dom 8693 df-sdom 8694 df-sup 9131 df-inf 9132 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-div 11563 df-nn 11904 df-2 11966 df-3 11967 df-n0 12164 df-z 12250 df-uz 12512 df-rp 12660 df-seq 13650 df-exp 13711 df-cj 14738 df-re 14739 df-im 14740 df-sqrt 14874 df-abs 14875 |
This theorem is referenced by: bezoutlem3 16177 bezoutlem4 16178 |
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