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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 12515 | . . . . . . . . 9 ⊢ 5 ∈ ℕ0 | |
| 2 | 1 | nn0zi 12610 | . . . . . . . 8 ⊢ 5 ∈ ℤ |
| 3 | 2z 12617 | . . . . . . . 8 ⊢ 2 ∈ ℤ | |
| 4 | dvdsmul2 16326 | . . . . . . . 8 ⊢ ((5 ∈ ℤ ∧ 2 ∈ ℤ) → 2 ∥ (5 · 2)) | |
| 5 | 2, 3, 4 | mp2an 704 | . . . . . . 7 ⊢ 2 ∥ (5 · 2) |
| 6 | 5t2e10 12807 | . . . . . . 7 ⊢ (5 · 2) = ;10 | |
| 7 | 5, 6 | breqtri 5130 | . . . . . 6 ⊢ 2 ∥ ;10 |
| 8 | 10nn0 12724 | . . . . . . . 8 ⊢ ;10 ∈ ℕ0 | |
| 9 | 8 | nn0zi 12610 | . . . . . . 7 ⊢ ;10 ∈ ℤ |
| 10 | dec2dvds.1 | . . . . . . . 8 ⊢ 𝐴 ∈ ℕ0 | |
| 11 | 10 | nn0zi 12610 | . . . . . . 7 ⊢ 𝐴 ∈ ℤ |
| 12 | dvdsmultr1 16344 | . . . . . . 7 ⊢ ((2 ∈ ℤ ∧ ;10 ∈ ℤ ∧ 𝐴 ∈ ℤ) → (2 ∥ ;10 → 2 ∥ (;10 · 𝐴))) | |
| 13 | 3, 9, 11, 12 | mp3an 1485 | . . . . . 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 12610 | . . . . . . 7 ⊢ 𝐵 ∈ ℤ |
| 17 | dvdsmul2 16326 | . . . . . . 7 ⊢ ((𝐵 ∈ ℤ ∧ 2 ∈ ℤ) → 2 ∥ (𝐵 · 2)) | |
| 18 | 16, 3, 17 | mp2an 704 | . . . . . 6 ⊢ 2 ∥ (𝐵 · 2) |
| 19 | dec2dvds.3 | . . . . . 6 ⊢ (𝐵 · 2) = 𝐶 | |
| 20 | 18, 19 | breqtri 5130 | . . . . 5 ⊢ 2 ∥ 𝐶 |
| 21 | 8, 10 | nn0mulcli 12533 | . . . . . . 7 ⊢ (;10 · 𝐴) ∈ ℕ0 |
| 22 | 21 | nn0zi 12610 | . . . . . 6 ⊢ (;10 · 𝐴) ∈ ℤ |
| 23 | 2nn0 12512 | . . . . . . . . 9 ⊢ 2 ∈ ℕ0 | |
| 24 | 15, 23 | nn0mulcli 12533 | . . . . . . . 8 ⊢ (𝐵 · 2) ∈ ℕ0 |
| 25 | 19, 24 | eqeltrri 2862 | . . . . . . 7 ⊢ 𝐶 ∈ ℕ0 |
| 26 | 25 | nn0zi 12610 | . . . . . 6 ⊢ 𝐶 ∈ ℤ |
| 27 | dvds2add 16338 | . . . . . 6 ⊢ ((2 ∈ ℤ ∧ (;10 · 𝐴) ∈ ℤ ∧ 𝐶 ∈ ℤ) → ((2 ∥ (;10 · 𝐴) ∧ 2 ∥ 𝐶) → 2 ∥ ((;10 · 𝐴) + 𝐶))) | |
| 28 | 3, 22, 26, 27 | mp3an 1485 | . . . . 5 ⊢ ((2 ∥ (;10 · 𝐴) ∧ 2 ∥ 𝐶) → 2 ∥ ((;10 · 𝐴) + 𝐶)) |
| 29 | 14, 20, 28 | mp2an 704 | . . . 4 ⊢ 2 ∥ ((;10 · 𝐴) + 𝐶) |
| 30 | dfdec10 12705 | . . . 4 ⊢ ;𝐴𝐶 = ((;10 · 𝐴) + 𝐶) | |
| 31 | 29, 30 | breqtrri 5132 | . . 3 ⊢ 2 ∥ ;𝐴𝐶 |
| 32 | 10, 25 | deccl 12717 | . . . . 5 ⊢ ;𝐴𝐶 ∈ ℕ0 |
| 33 | 32 | nn0zi 12610 | . . . 4 ⊢ ;𝐴𝐶 ∈ ℤ |
| 34 | 2nn 12305 | . . . 4 ⊢ 2 ∈ ℕ | |
| 35 | 1lt2 12404 | . . . 4 ⊢ 1 < 2 | |
| 36 | ndvdsp1 16459 | . . . 4 ⊢ ((;𝐴𝐶 ∈ ℤ ∧ 2 ∈ ℕ ∧ 1 < 2) → (2 ∥ ;𝐴𝐶 → ¬ 2 ∥ (;𝐴𝐶 + 1))) | |
| 37 | 33, 34, 35, 36 | mp3an 1485 | . . 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 2774 | . . . 4 ⊢ (𝐶 + 1) = 𝐷 |
| 41 | eqid 2765 | . . . 4 ⊢ ;𝐴𝐶 = ;𝐴𝐶 | |
| 42 | 10, 25, 40, 41 | decsuc 12738 | . . 3 ⊢ (;𝐴𝐶 + 1) = ;𝐴𝐷 |
| 43 | 42 | breq2i 5113 | . 2 ⊢ (2 ∥ (;𝐴𝐶 + 1) ↔ 2 ∥ ;𝐴𝐷) |
| 44 | 38, 43 | mtbi 325 | 1 ⊢ ¬ 2 ∥ ;𝐴𝐷 |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 400 = wceq 1563 ∈ wcel 2145 class class class wbr 5105 (class class class)co 7400 0cc0 11088 1c1 11089 + caddc 11091 · cmul 11093 < clt 11231 ℕcn 12224 2c2 12286 5c5 12289 ℕ0cn0 12495 ℤcz 12582 ;cdc 12702 ∥ cdvds 16300 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2737 ax-sep 5251 ax-nul 5261 ax-pow 5327 ax-pr 5395 ax-un 7722 ax-cnex 11144 ax-resscn 11145 ax-1cn 11146 ax-icn 11147 ax-addcl 11148 ax-addrcl 11149 ax-mulcl 11150 ax-mulrcl 11151 ax-mulcom 11152 ax-addass 11153 ax-mulass 11154 ax-distr 11155 ax-i2m1 11156 ax-1ne0 11157 ax-1rid 11158 ax-rnegex 11159 ax-rrecex 11160 ax-cnre 11161 ax-pre-lttri 11162 ax-pre-lttrn 11163 ax-pre-ltadd 11164 ax-pre-mulgt0 11165 ax-pre-sup 11166 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1566 df-fal 1576 df-ex 1803 df-nf 1807 df-sb 2094 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3065 df-ral 3080 df-rex 3090 df-rmo 3370 df-reu 3371 df-rab 3418 df-v 3459 df-sbc 3748 df-csb 3856 df-dif 3910 df-un 3912 df-in 3914 df-ss 3924 df-pss 3927 df-nul 4289 df-if 4484 df-pw 4560 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4869 df-iun 4954 df-br 5106 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5547 df-eprel 5552 df-po 5560 df-so 5561 df-fr 5605 df-we 5607 df-xp 5658 df-rel 5659 df-cnv 5660 df-co 5661 df-dm 5662 df-rn 5663 df-res 5664 df-ima 5665 df-pred 6292 df-ord 6353 df-on 6354 df-lim 6355 df-suc 6356 df-iota 6481 df-fun 6527 df-fn 6528 df-f 6529 df-f1 6530 df-fo 6531 df-f1o 6532 df-fv 6533 df-riota 7357 df-ov 7403 df-oprab 7404 df-mpo 7405 df-om 7851 df-1st 7974 df-2nd 7975 df-frecs 8266 df-wrecs 8297 df-recs 8346 df-rdg 8385 df-er 8682 df-en 8932 df-dom 8933 df-sdom 8934 df-sup 9390 df-inf 9391 df-pnf 11233 df-mnf 11234 df-xr 11235 df-ltxr 11236 df-le 11237 df-sub 11431 df-neg 11432 df-div 11860 df-nn 12225 df-2 12294 df-3 12295 df-4 12296 df-5 12297 df-6 12298 df-7 12299 df-8 12300 df-9 12301 df-n0 12496 df-z 12583 df-dec 12703 df-uz 12854 df-rp 13008 df-fz 13527 df-seq 14029 df-exp 14089 df-cj 15140 df-re 15141 df-im 15142 df-sqrt 15276 df-abs 15277 df-dvds 16301 |
| This theorem is referenced by: 11prm 17165 13prm 17166 17prm 17167 19prm 17168 23prm 17169 37prm 17171 43prm 17172 83prm 17173 139prm 17174 163prm 17175 317prm 17176 631prm 17177 257prm 48168 139prmALT 48203 31prm 48204 127prm 48206 |
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