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Mirrors > Home > ILE Home > Th. List > numdensq | GIF version |
Description: Squaring a rational squares its canonical components. (Contributed by Stefan O'Rear, 15-Sep-2014.) |
Ref | Expression |
---|---|
numdensq | ⊢ (𝐴 ∈ ℚ → ((numer‘(𝐴↑2)) = ((numer‘𝐴)↑2) ∧ (denom‘(𝐴↑2)) = ((denom‘𝐴)↑2))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | qnumdencoprm 12104 | . . . 4 ⊢ (𝐴 ∈ ℚ → ((numer‘𝐴) gcd (denom‘𝐴)) = 1) | |
2 | 1 | oveq1d 5851 | . . 3 ⊢ (𝐴 ∈ ℚ → (((numer‘𝐴) gcd (denom‘𝐴))↑2) = (1↑2)) |
3 | qnumcl 12099 | . . . 4 ⊢ (𝐴 ∈ ℚ → (numer‘𝐴) ∈ ℤ) | |
4 | qdencl 12100 | . . . . 5 ⊢ (𝐴 ∈ ℚ → (denom‘𝐴) ∈ ℕ) | |
5 | 4 | nnzd 9303 | . . . 4 ⊢ (𝐴 ∈ ℚ → (denom‘𝐴) ∈ ℤ) |
6 | zgcdsq 12112 | . . . 4 ⊢ (((numer‘𝐴) ∈ ℤ ∧ (denom‘𝐴) ∈ ℤ) → (((numer‘𝐴) gcd (denom‘𝐴))↑2) = (((numer‘𝐴)↑2) gcd ((denom‘𝐴)↑2))) | |
7 | 3, 5, 6 | syl2anc 409 | . . 3 ⊢ (𝐴 ∈ ℚ → (((numer‘𝐴) gcd (denom‘𝐴))↑2) = (((numer‘𝐴)↑2) gcd ((denom‘𝐴)↑2))) |
8 | sq1 10538 | . . . 4 ⊢ (1↑2) = 1 | |
9 | 8 | a1i 9 | . . 3 ⊢ (𝐴 ∈ ℚ → (1↑2) = 1) |
10 | 2, 7, 9 | 3eqtr3d 2205 | . 2 ⊢ (𝐴 ∈ ℚ → (((numer‘𝐴)↑2) gcd ((denom‘𝐴)↑2)) = 1) |
11 | qeqnumdivden 12105 | . . . 4 ⊢ (𝐴 ∈ ℚ → 𝐴 = ((numer‘𝐴) / (denom‘𝐴))) | |
12 | 11 | oveq1d 5851 | . . 3 ⊢ (𝐴 ∈ ℚ → (𝐴↑2) = (((numer‘𝐴) / (denom‘𝐴))↑2)) |
13 | 3 | zcnd 9305 | . . . 4 ⊢ (𝐴 ∈ ℚ → (numer‘𝐴) ∈ ℂ) |
14 | 4 | nncnd 8862 | . . . 4 ⊢ (𝐴 ∈ ℚ → (denom‘𝐴) ∈ ℂ) |
15 | 4 | nnap0d 8894 | . . . 4 ⊢ (𝐴 ∈ ℚ → (denom‘𝐴) # 0) |
16 | 13, 14, 15 | sqdivapd 10590 | . . 3 ⊢ (𝐴 ∈ ℚ → (((numer‘𝐴) / (denom‘𝐴))↑2) = (((numer‘𝐴)↑2) / ((denom‘𝐴)↑2))) |
17 | 12, 16 | eqtrd 2197 | . 2 ⊢ (𝐴 ∈ ℚ → (𝐴↑2) = (((numer‘𝐴)↑2) / ((denom‘𝐴)↑2))) |
18 | qsqcl 10516 | . . 3 ⊢ (𝐴 ∈ ℚ → (𝐴↑2) ∈ ℚ) | |
19 | zsqcl 10515 | . . . 4 ⊢ ((numer‘𝐴) ∈ ℤ → ((numer‘𝐴)↑2) ∈ ℤ) | |
20 | 3, 19 | syl 14 | . . 3 ⊢ (𝐴 ∈ ℚ → ((numer‘𝐴)↑2) ∈ ℤ) |
21 | 4 | nnsqcld 10598 | . . 3 ⊢ (𝐴 ∈ ℚ → ((denom‘𝐴)↑2) ∈ ℕ) |
22 | qnumdenbi 12103 | . . 3 ⊢ (((𝐴↑2) ∈ ℚ ∧ ((numer‘𝐴)↑2) ∈ ℤ ∧ ((denom‘𝐴)↑2) ∈ ℕ) → (((((numer‘𝐴)↑2) gcd ((denom‘𝐴)↑2)) = 1 ∧ (𝐴↑2) = (((numer‘𝐴)↑2) / ((denom‘𝐴)↑2))) ↔ ((numer‘(𝐴↑2)) = ((numer‘𝐴)↑2) ∧ (denom‘(𝐴↑2)) = ((denom‘𝐴)↑2)))) | |
23 | 18, 20, 21, 22 | syl3anc 1227 | . 2 ⊢ (𝐴 ∈ ℚ → (((((numer‘𝐴)↑2) gcd ((denom‘𝐴)↑2)) = 1 ∧ (𝐴↑2) = (((numer‘𝐴)↑2) / ((denom‘𝐴)↑2))) ↔ ((numer‘(𝐴↑2)) = ((numer‘𝐴)↑2) ∧ (denom‘(𝐴↑2)) = ((denom‘𝐴)↑2)))) |
24 | 10, 17, 23 | mpbi2and 932 | 1 ⊢ (𝐴 ∈ ℚ → ((numer‘(𝐴↑2)) = ((numer‘𝐴)↑2) ∧ (denom‘(𝐴↑2)) = ((denom‘𝐴)↑2))) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ↔ wb 104 = wceq 1342 ∈ wcel 2135 ‘cfv 5182 (class class class)co 5836 1c1 7745 / cdiv 8559 ℕcn 8848 2c2 8899 ℤcz 9182 ℚcq 9548 ↑cexp 10444 gcd cgcd 11860 numercnumer 12092 denomcdenom 12093 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1434 ax-7 1435 ax-gen 1436 ax-ie1 1480 ax-ie2 1481 ax-8 1491 ax-10 1492 ax-11 1493 ax-i12 1494 ax-bndl 1496 ax-4 1497 ax-17 1513 ax-i9 1517 ax-ial 1521 ax-i5r 1522 ax-13 2137 ax-14 2138 ax-ext 2146 ax-coll 4091 ax-sep 4094 ax-nul 4102 ax-pow 4147 ax-pr 4181 ax-un 4405 ax-setind 4508 ax-iinf 4559 ax-cnex 7835 ax-resscn 7836 ax-1cn 7837 ax-1re 7838 ax-icn 7839 ax-addcl 7840 ax-addrcl 7841 ax-mulcl 7842 ax-mulrcl 7843 ax-addcom 7844 ax-mulcom 7845 ax-addass 7846 ax-mulass 7847 ax-distr 7848 ax-i2m1 7849 ax-0lt1 7850 ax-1rid 7851 ax-0id 7852 ax-rnegex 7853 ax-precex 7854 ax-cnre 7855 ax-pre-ltirr 7856 ax-pre-ltwlin 7857 ax-pre-lttrn 7858 ax-pre-apti 7859 ax-pre-ltadd 7860 ax-pre-mulgt0 7861 ax-pre-mulext 7862 ax-arch 7863 ax-caucvg 7864 |
This theorem depends on definitions: df-bi 116 df-stab 821 df-dc 825 df-3or 968 df-3an 969 df-tru 1345 df-fal 1348 df-nf 1448 df-sb 1750 df-eu 2016 df-mo 2017 df-clab 2151 df-cleq 2157 df-clel 2160 df-nfc 2295 df-ne 2335 df-nel 2430 df-ral 2447 df-rex 2448 df-reu 2449 df-rmo 2450 df-rab 2451 df-v 2723 df-sbc 2947 df-csb 3041 df-dif 3113 df-un 3115 df-in 3117 df-ss 3124 df-nul 3405 df-if 3516 df-pw 3555 df-sn 3576 df-pr 3577 df-op 3579 df-uni 3784 df-int 3819 df-iun 3862 df-br 3977 df-opab 4038 df-mpt 4039 df-tr 4075 df-id 4265 df-po 4268 df-iso 4269 df-iord 4338 df-on 4340 df-ilim 4341 df-suc 4343 df-iom 4562 df-xp 4604 df-rel 4605 df-cnv 4606 df-co 4607 df-dm 4608 df-rn 4609 df-res 4610 df-ima 4611 df-iota 5147 df-fun 5184 df-fn 5185 df-f 5186 df-f1 5187 df-fo 5188 df-f1o 5189 df-fv 5190 df-riota 5792 df-ov 5839 df-oprab 5840 df-mpo 5841 df-1st 6100 df-2nd 6101 df-recs 6264 df-frec 6350 df-sup 6940 df-pnf 7926 df-mnf 7927 df-xr 7928 df-ltxr 7929 df-le 7930 df-sub 8062 df-neg 8063 df-reap 8464 df-ap 8471 df-div 8560 df-inn 8849 df-2 8907 df-3 8908 df-4 8909 df-n0 9106 df-z 9183 df-uz 9458 df-q 9549 df-rp 9581 df-fz 9936 df-fzo 10068 df-fl 10195 df-mod 10248 df-seqfrec 10371 df-exp 10445 df-cj 10770 df-re 10771 df-im 10772 df-rsqrt 10926 df-abs 10927 df-dvds 11714 df-gcd 11861 df-numer 12094 df-denom 12095 |
This theorem is referenced by: numsq 12114 densq 12115 |
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