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Mirrors > Home > MPE Home > Th. List > Mathboxes > divgcdoddALTV | Structured version Visualization version GIF version |
Description: Either 𝐴 / (𝐴 gcd 𝐵) is odd or 𝐵 / (𝐴 gcd 𝐵) is odd. (Contributed by Scott Fenton, 19-Apr-2014.) (Revised by AV, 21-Jun-2020.) |
Ref | Expression |
---|---|
divgcdoddALTV | ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → ((𝐴 / (𝐴 gcd 𝐵)) ∈ Odd ∨ (𝐵 / (𝐴 gcd 𝐵)) ∈ Odd )) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | divgcdodd 16651 | . . 3 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → (¬ 2 ∥ (𝐴 / (𝐴 gcd 𝐵)) ∨ ¬ 2 ∥ (𝐵 / (𝐴 gcd 𝐵)))) | |
2 | nnz 12583 | . . . . . . . 8 ⊢ (𝐴 ∈ ℕ → 𝐴 ∈ ℤ) | |
3 | nnz 12583 | . . . . . . . 8 ⊢ (𝐵 ∈ ℕ → 𝐵 ∈ ℤ) | |
4 | gcddvds 16448 | . . . . . . . 8 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → ((𝐴 gcd 𝐵) ∥ 𝐴 ∧ (𝐴 gcd 𝐵) ∥ 𝐵)) | |
5 | 2, 3, 4 | syl2an 594 | . . . . . . 7 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → ((𝐴 gcd 𝐵) ∥ 𝐴 ∧ (𝐴 gcd 𝐵) ∥ 𝐵)) |
6 | 5 | simpld 493 | . . . . . 6 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → (𝐴 gcd 𝐵) ∥ 𝐴) |
7 | 2, 3 | anim12i 611 | . . . . . . . . 9 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → (𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ)) |
8 | nnne0 12250 | . . . . . . . . . . . 12 ⊢ (𝐴 ∈ ℕ → 𝐴 ≠ 0) | |
9 | 8 | neneqd 2943 | . . . . . . . . . . 11 ⊢ (𝐴 ∈ ℕ → ¬ 𝐴 = 0) |
10 | 9 | intnanrd 488 | . . . . . . . . . 10 ⊢ (𝐴 ∈ ℕ → ¬ (𝐴 = 0 ∧ 𝐵 = 0)) |
11 | 10 | adantr 479 | . . . . . . . . 9 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → ¬ (𝐴 = 0 ∧ 𝐵 = 0)) |
12 | gcdn0cl 16447 | . . . . . . . . 9 ⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) ∧ ¬ (𝐴 = 0 ∧ 𝐵 = 0)) → (𝐴 gcd 𝐵) ∈ ℕ) | |
13 | 7, 11, 12 | syl2anc 582 | . . . . . . . 8 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → (𝐴 gcd 𝐵) ∈ ℕ) |
14 | 13 | nnzd 12589 | . . . . . . 7 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → (𝐴 gcd 𝐵) ∈ ℤ) |
15 | 13 | nnne0d 12266 | . . . . . . 7 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → (𝐴 gcd 𝐵) ≠ 0) |
16 | 2 | adantr 479 | . . . . . . 7 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → 𝐴 ∈ ℤ) |
17 | dvdsval2 16204 | . . . . . . 7 ⊢ (((𝐴 gcd 𝐵) ∈ ℤ ∧ (𝐴 gcd 𝐵) ≠ 0 ∧ 𝐴 ∈ ℤ) → ((𝐴 gcd 𝐵) ∥ 𝐴 ↔ (𝐴 / (𝐴 gcd 𝐵)) ∈ ℤ)) | |
18 | 14, 15, 16, 17 | syl3anc 1369 | . . . . . 6 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → ((𝐴 gcd 𝐵) ∥ 𝐴 ↔ (𝐴 / (𝐴 gcd 𝐵)) ∈ ℤ)) |
19 | 6, 18 | mpbid 231 | . . . . 5 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → (𝐴 / (𝐴 gcd 𝐵)) ∈ ℤ) |
20 | 19 | biantrurd 531 | . . . 4 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → (¬ 2 ∥ (𝐴 / (𝐴 gcd 𝐵)) ↔ ((𝐴 / (𝐴 gcd 𝐵)) ∈ ℤ ∧ ¬ 2 ∥ (𝐴 / (𝐴 gcd 𝐵))))) |
21 | 5 | simprd 494 | . . . . . 6 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → (𝐴 gcd 𝐵) ∥ 𝐵) |
22 | 3 | adantl 480 | . . . . . . 7 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → 𝐵 ∈ ℤ) |
23 | dvdsval2 16204 | . . . . . . 7 ⊢ (((𝐴 gcd 𝐵) ∈ ℤ ∧ (𝐴 gcd 𝐵) ≠ 0 ∧ 𝐵 ∈ ℤ) → ((𝐴 gcd 𝐵) ∥ 𝐵 ↔ (𝐵 / (𝐴 gcd 𝐵)) ∈ ℤ)) | |
24 | 14, 15, 22, 23 | syl3anc 1369 | . . . . . 6 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → ((𝐴 gcd 𝐵) ∥ 𝐵 ↔ (𝐵 / (𝐴 gcd 𝐵)) ∈ ℤ)) |
25 | 21, 24 | mpbid 231 | . . . . 5 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → (𝐵 / (𝐴 gcd 𝐵)) ∈ ℤ) |
26 | 25 | biantrurd 531 | . . . 4 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → (¬ 2 ∥ (𝐵 / (𝐴 gcd 𝐵)) ↔ ((𝐵 / (𝐴 gcd 𝐵)) ∈ ℤ ∧ ¬ 2 ∥ (𝐵 / (𝐴 gcd 𝐵))))) |
27 | 20, 26 | orbi12d 915 | . . 3 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → ((¬ 2 ∥ (𝐴 / (𝐴 gcd 𝐵)) ∨ ¬ 2 ∥ (𝐵 / (𝐴 gcd 𝐵))) ↔ (((𝐴 / (𝐴 gcd 𝐵)) ∈ ℤ ∧ ¬ 2 ∥ (𝐴 / (𝐴 gcd 𝐵))) ∨ ((𝐵 / (𝐴 gcd 𝐵)) ∈ ℤ ∧ ¬ 2 ∥ (𝐵 / (𝐴 gcd 𝐵)))))) |
28 | 1, 27 | mpbid 231 | . 2 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → (((𝐴 / (𝐴 gcd 𝐵)) ∈ ℤ ∧ ¬ 2 ∥ (𝐴 / (𝐴 gcd 𝐵))) ∨ ((𝐵 / (𝐴 gcd 𝐵)) ∈ ℤ ∧ ¬ 2 ∥ (𝐵 / (𝐴 gcd 𝐵))))) |
29 | isodd3 46618 | . . 3 ⊢ ((𝐴 / (𝐴 gcd 𝐵)) ∈ Odd ↔ ((𝐴 / (𝐴 gcd 𝐵)) ∈ ℤ ∧ ¬ 2 ∥ (𝐴 / (𝐴 gcd 𝐵)))) | |
30 | isodd3 46618 | . . 3 ⊢ ((𝐵 / (𝐴 gcd 𝐵)) ∈ Odd ↔ ((𝐵 / (𝐴 gcd 𝐵)) ∈ ℤ ∧ ¬ 2 ∥ (𝐵 / (𝐴 gcd 𝐵)))) | |
31 | 29, 30 | orbi12i 911 | . 2 ⊢ (((𝐴 / (𝐴 gcd 𝐵)) ∈ Odd ∨ (𝐵 / (𝐴 gcd 𝐵)) ∈ Odd ) ↔ (((𝐴 / (𝐴 gcd 𝐵)) ∈ ℤ ∧ ¬ 2 ∥ (𝐴 / (𝐴 gcd 𝐵))) ∨ ((𝐵 / (𝐴 gcd 𝐵)) ∈ ℤ ∧ ¬ 2 ∥ (𝐵 / (𝐴 gcd 𝐵))))) |
32 | 28, 31 | sylibr 233 | 1 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → ((𝐴 / (𝐴 gcd 𝐵)) ∈ Odd ∨ (𝐵 / (𝐴 gcd 𝐵)) ∈ Odd )) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 394 ∨ wo 843 = wceq 1539 ∈ wcel 2104 ≠ wne 2938 class class class wbr 5147 (class class class)co 7411 0cc0 11112 / cdiv 11875 ℕcn 12216 2c2 12271 ℤcz 12562 ∥ cdvds 16201 gcd cgcd 16439 Odd codd 46591 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2701 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7727 ax-cnex 11168 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189 ax-pre-sup 11190 |
This theorem depends on definitions: df-bi 206 df-an 395 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2532 df-eu 2561 df-clab 2708 df-cleq 2722 df-clel 2808 df-nfc 2883 df-ne 2939 df-nel 3045 df-ral 3060 df-rex 3069 df-rmo 3374 df-reu 3375 df-rab 3431 df-v 3474 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-op 4634 df-uni 4908 df-iun 4998 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6299 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6494 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-riota 7367 df-ov 7414 df-oprab 7415 df-mpo 7416 df-om 7858 df-2nd 7978 df-frecs 8268 df-wrecs 8299 df-recs 8373 df-rdg 8412 df-er 8705 df-en 8942 df-dom 8943 df-sdom 8944 df-sup 9439 df-inf 9440 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-div 11876 df-nn 12217 df-2 12279 df-3 12280 df-n0 12477 df-z 12563 df-uz 12827 df-rp 12979 df-fl 13761 df-mod 13839 df-seq 13971 df-exp 14032 df-cj 15050 df-re 15051 df-im 15052 df-sqrt 15186 df-abs 15187 df-dvds 16202 df-gcd 16440 df-odd 46593 |
This theorem is referenced by: (None) |
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