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| Mirrors > Home > MPE Home > Th. List > dec2dvds | Structured version Visualization version GIF version | ||
| Description: Divisibility by two is obvious in base 10. (Contributed by Mario Carneiro, 19-Apr-2015.) |
| Ref | Expression |
|---|---|
| dec2dvds.1 | ⊢ 𝐴 ∈ ℕ0 |
| dec2dvds.2 | ⊢ 𝐵 ∈ ℕ0 |
| dec2dvds.3 | ⊢ (𝐵 · 2) = 𝐶 |
| dec2dvds.4 | ⊢ 𝐷 = (𝐶 + 1) |
| Ref | Expression |
|---|---|
| dec2dvds | ⊢ ¬ 2 ∥ ;𝐴𝐷 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 5nn0 12433 | . . . . . . . . 9 ⊢ 5 ∈ ℕ0 | |
| 2 | 1 | nn0zi 12528 | . . . . . . . 8 ⊢ 5 ∈ ℤ |
| 3 | 2z 12535 | . . . . . . . 8 ⊢ 2 ∈ ℤ | |
| 4 | dvdsmul2 16217 | . . . . . . . 8 ⊢ ((5 ∈ ℤ ∧ 2 ∈ ℤ) → 2 ∥ (5 · 2)) | |
| 5 | 2, 3, 4 | mp2an 693 | . . . . . . 7 ⊢ 2 ∥ (5 · 2) |
| 6 | 5t2e10 12719 | . . . . . . 7 ⊢ (5 · 2) = ;10 | |
| 7 | 5, 6 | breqtri 5125 | . . . . . 6 ⊢ 2 ∥ ;10 |
| 8 | 10nn0 12637 | . . . . . . . 8 ⊢ ;10 ∈ ℕ0 | |
| 9 | 8 | nn0zi 12528 | . . . . . . 7 ⊢ ;10 ∈ ℤ |
| 10 | dec2dvds.1 | . . . . . . . 8 ⊢ 𝐴 ∈ ℕ0 | |
| 11 | 10 | nn0zi 12528 | . . . . . . 7 ⊢ 𝐴 ∈ ℤ |
| 12 | dvdsmultr1 16235 | . . . . . . 7 ⊢ ((2 ∈ ℤ ∧ ;10 ∈ ℤ ∧ 𝐴 ∈ ℤ) → (2 ∥ ;10 → 2 ∥ (;10 · 𝐴))) | |
| 13 | 3, 9, 11, 12 | mp3an 1464 | . . . . . 6 ⊢ (2 ∥ ;10 → 2 ∥ (;10 · 𝐴)) |
| 14 | 7, 13 | ax-mp 5 | . . . . 5 ⊢ 2 ∥ (;10 · 𝐴) |
| 15 | dec2dvds.2 | . . . . . . . 8 ⊢ 𝐵 ∈ ℕ0 | |
| 16 | 15 | nn0zi 12528 | . . . . . . 7 ⊢ 𝐵 ∈ ℤ |
| 17 | dvdsmul2 16217 | . . . . . . 7 ⊢ ((𝐵 ∈ ℤ ∧ 2 ∈ ℤ) → 2 ∥ (𝐵 · 2)) | |
| 18 | 16, 3, 17 | mp2an 693 | . . . . . 6 ⊢ 2 ∥ (𝐵 · 2) |
| 19 | dec2dvds.3 | . . . . . 6 ⊢ (𝐵 · 2) = 𝐶 | |
| 20 | 18, 19 | breqtri 5125 | . . . . 5 ⊢ 2 ∥ 𝐶 |
| 21 | 8, 10 | nn0mulcli 12451 | . . . . . . 7 ⊢ (;10 · 𝐴) ∈ ℕ0 |
| 22 | 21 | nn0zi 12528 | . . . . . 6 ⊢ (;10 · 𝐴) ∈ ℤ |
| 23 | 2nn0 12430 | . . . . . . . . 9 ⊢ 2 ∈ ℕ0 | |
| 24 | 15, 23 | nn0mulcli 12451 | . . . . . . . 8 ⊢ (𝐵 · 2) ∈ ℕ0 |
| 25 | 19, 24 | eqeltrri 2834 | . . . . . . 7 ⊢ 𝐶 ∈ ℕ0 |
| 26 | 25 | nn0zi 12528 | . . . . . 6 ⊢ 𝐶 ∈ ℤ |
| 27 | dvds2add 16229 | . . . . . 6 ⊢ ((2 ∈ ℤ ∧ (;10 · 𝐴) ∈ ℤ ∧ 𝐶 ∈ ℤ) → ((2 ∥ (;10 · 𝐴) ∧ 2 ∥ 𝐶) → 2 ∥ ((;10 · 𝐴) + 𝐶))) | |
| 28 | 3, 22, 26, 27 | mp3an 1464 | . . . . 5 ⊢ ((2 ∥ (;10 · 𝐴) ∧ 2 ∥ 𝐶) → 2 ∥ ((;10 · 𝐴) + 𝐶)) |
| 29 | 14, 20, 28 | mp2an 693 | . . . 4 ⊢ 2 ∥ ((;10 · 𝐴) + 𝐶) |
| 30 | dfdec10 12622 | . . . 4 ⊢ ;𝐴𝐶 = ((;10 · 𝐴) + 𝐶) | |
| 31 | 29, 30 | breqtrri 5127 | . . 3 ⊢ 2 ∥ ;𝐴𝐶 |
| 32 | 10, 25 | deccl 12634 | . . . . 5 ⊢ ;𝐴𝐶 ∈ ℕ0 |
| 33 | 32 | nn0zi 12528 | . . . 4 ⊢ ;𝐴𝐶 ∈ ℤ |
| 34 | 2nn 12230 | . . . 4 ⊢ 2 ∈ ℕ | |
| 35 | 1lt2 12323 | . . . 4 ⊢ 1 < 2 | |
| 36 | ndvdsp1 16350 | . . . 4 ⊢ ((;𝐴𝐶 ∈ ℤ ∧ 2 ∈ ℕ ∧ 1 < 2) → (2 ∥ ;𝐴𝐶 → ¬ 2 ∥ (;𝐴𝐶 + 1))) | |
| 37 | 33, 34, 35, 36 | mp3an 1464 | . . 3 ⊢ (2 ∥ ;𝐴𝐶 → ¬ 2 ∥ (;𝐴𝐶 + 1)) |
| 38 | 31, 37 | ax-mp 5 | . 2 ⊢ ¬ 2 ∥ (;𝐴𝐶 + 1) |
| 39 | dec2dvds.4 | . . . . 5 ⊢ 𝐷 = (𝐶 + 1) | |
| 40 | 39 | eqcomi 2746 | . . . 4 ⊢ (𝐶 + 1) = 𝐷 |
| 41 | eqid 2737 | . . . 4 ⊢ ;𝐴𝐶 = ;𝐴𝐶 | |
| 42 | 10, 25, 40, 41 | decsuc 12650 | . . 3 ⊢ (;𝐴𝐶 + 1) = ;𝐴𝐷 |
| 43 | 42 | breq2i 5108 | . 2 ⊢ (2 ∥ (;𝐴𝐶 + 1) ↔ 2 ∥ ;𝐴𝐷) |
| 44 | 38, 43 | mtbi 322 | 1 ⊢ ¬ 2 ∥ ;𝐴𝐷 |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 = wceq 1542 ∈ wcel 2114 class class class wbr 5100 (class class class)co 7368 0cc0 11038 1c1 11039 + caddc 11041 · cmul 11043 < clt 11178 ℕcn 12157 2c2 12212 5c5 12215 ℕ0cn0 12413 ℤcz 12500 ;cdc 12619 ∥ cdvds 16191 |
| 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 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5243 ax-nul 5253 ax-pow 5312 ax-pr 5379 ax-un 7690 ax-cnex 11094 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115 ax-pre-sup 11116 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3352 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-iun 4950 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5527 df-eprel 5532 df-po 5540 df-so 5541 df-fr 5585 df-we 5587 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-pred 6267 df-ord 6328 df-on 6329 df-lim 6330 df-suc 6331 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-riota 7325 df-ov 7371 df-oprab 7372 df-mpo 7373 df-om 7819 df-1st 7943 df-2nd 7944 df-frecs 8233 df-wrecs 8264 df-recs 8313 df-rdg 8351 df-er 8645 df-en 8896 df-dom 8897 df-sdom 8898 df-sup 9357 df-inf 9358 df-pnf 11180 df-mnf 11181 df-xr 11182 df-ltxr 11183 df-le 11184 df-sub 11378 df-neg 11379 df-div 11807 df-nn 12158 df-2 12220 df-3 12221 df-4 12222 df-5 12223 df-6 12224 df-7 12225 df-8 12226 df-9 12227 df-n0 12414 df-z 12501 df-dec 12620 df-uz 12764 df-rp 12918 df-fz 13436 df-seq 13937 df-exp 13997 df-cj 15034 df-re 15035 df-im 15036 df-sqrt 15170 df-abs 15171 df-dvds 16192 |
| This theorem is referenced by: 11prm 17054 13prm 17055 17prm 17056 19prm 17057 23prm 17058 37prm 17060 43prm 17061 83prm 17062 139prm 17063 163prm 17064 317prm 17065 631prm 17066 257prm 47915 139prmALT 47950 31prm 47951 127prm 47953 |
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