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Mirrors > Home > MPE Home > Th. List > zgcdsq | Structured version Visualization version GIF version |
Description: nn0gcdsq 16152 extended to integers by symmetry. (Contributed by Stefan O'Rear, 15-Sep-2014.) |
Ref | Expression |
---|---|
zgcdsq | ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → ((𝐴 gcd 𝐵)↑2) = ((𝐴↑2) gcd (𝐵↑2))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | gcdabs 15933 | . . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → ((abs‘𝐴) gcd (abs‘𝐵)) = (𝐴 gcd 𝐵)) | |
2 | 1 | eqcomd 2764 | . . 3 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → (𝐴 gcd 𝐵) = ((abs‘𝐴) gcd (abs‘𝐵))) |
3 | 2 | oveq1d 7170 | . 2 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → ((𝐴 gcd 𝐵)↑2) = (((abs‘𝐴) gcd (abs‘𝐵))↑2)) |
4 | nn0abscl 14725 | . . 3 ⊢ (𝐴 ∈ ℤ → (abs‘𝐴) ∈ ℕ0) | |
5 | nn0abscl 14725 | . . 3 ⊢ (𝐵 ∈ ℤ → (abs‘𝐵) ∈ ℕ0) | |
6 | nn0gcdsq 16152 | . . 3 ⊢ (((abs‘𝐴) ∈ ℕ0 ∧ (abs‘𝐵) ∈ ℕ0) → (((abs‘𝐴) gcd (abs‘𝐵))↑2) = (((abs‘𝐴)↑2) gcd ((abs‘𝐵)↑2))) | |
7 | 4, 5, 6 | syl2an 598 | . 2 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → (((abs‘𝐴) gcd (abs‘𝐵))↑2) = (((abs‘𝐴)↑2) gcd ((abs‘𝐵)↑2))) |
8 | zre 12029 | . . . . 5 ⊢ (𝐴 ∈ ℤ → 𝐴 ∈ ℝ) | |
9 | 8 | adantr 484 | . . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → 𝐴 ∈ ℝ) |
10 | absresq 14715 | . . . 4 ⊢ (𝐴 ∈ ℝ → ((abs‘𝐴)↑2) = (𝐴↑2)) | |
11 | 9, 10 | syl 17 | . . 3 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → ((abs‘𝐴)↑2) = (𝐴↑2)) |
12 | zre 12029 | . . . . 5 ⊢ (𝐵 ∈ ℤ → 𝐵 ∈ ℝ) | |
13 | 12 | adantl 485 | . . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → 𝐵 ∈ ℝ) |
14 | absresq 14715 | . . . 4 ⊢ (𝐵 ∈ ℝ → ((abs‘𝐵)↑2) = (𝐵↑2)) | |
15 | 13, 14 | syl 17 | . . 3 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → ((abs‘𝐵)↑2) = (𝐵↑2)) |
16 | 11, 15 | oveq12d 7173 | . 2 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → (((abs‘𝐴)↑2) gcd ((abs‘𝐵)↑2)) = ((𝐴↑2) gcd (𝐵↑2))) |
17 | 3, 7, 16 | 3eqtrd 2797 | 1 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → ((𝐴 gcd 𝐵)↑2) = ((𝐴↑2) gcd (𝐵↑2))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 399 = wceq 1538 ∈ wcel 2111 ‘cfv 6339 (class class class)co 7155 ℝcr 10579 2c2 11734 ℕ0cn0 11939 ℤcz 12025 ↑cexp 13484 abscabs 14646 gcd cgcd 15898 |
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-pow 5237 ax-pr 5301 ax-un 7464 ax-cnex 10636 ax-resscn 10637 ax-1cn 10638 ax-icn 10639 ax-addcl 10640 ax-addrcl 10641 ax-mulcl 10642 ax-mulrcl 10643 ax-mulcom 10644 ax-addass 10645 ax-mulass 10646 ax-distr 10647 ax-i2m1 10648 ax-1ne0 10649 ax-1rid 10650 ax-rnegex 10651 ax-rrecex 10652 ax-cnre 10653 ax-pre-lttri 10654 ax-pre-lttrn 10655 ax-pre-ltadd 10656 ax-pre-mulgt0 10657 ax-pre-sup 10658 |
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-nel 3056 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-riota 7113 df-ov 7158 df-oprab 7159 df-mpo 7160 df-om 7585 df-2nd 7699 df-wrecs 7962 df-recs 8023 df-rdg 8061 df-er 8304 df-en 8533 df-dom 8534 df-sdom 8535 df-sup 8944 df-inf 8945 df-pnf 10720 df-mnf 10721 df-xr 10722 df-ltxr 10723 df-le 10724 df-sub 10915 df-neg 10916 df-div 11341 df-nn 11680 df-2 11742 df-3 11743 df-n0 11940 df-z 12026 df-uz 12288 df-rp 12436 df-fl 13216 df-mod 13292 df-seq 13424 df-exp 13485 df-cj 14511 df-re 14512 df-im 14513 df-sqrt 14647 df-abs 14648 df-dvds 15661 df-gcd 15899 |
This theorem is referenced by: numdensq 16154 |
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