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| Mirrors > Home > ILE Home > Th. List > expnprm | GIF version | ||
| Description: A second or higher power of a rational number is not a prime number. Or by contraposition, the n-th root of a prime number is not rational. Suggested by Norm Megill. (Contributed by Mario Carneiro, 10-Aug-2015.) |
| Ref | Expression |
|---|---|
| expnprm | ⊢ ((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) → ¬ (𝐴↑𝑁) ∈ ℙ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eluz2b3 9954 | . . . 4 ⊢ (𝑁 ∈ (ℤ≥‘2) ↔ (𝑁 ∈ ℕ ∧ 𝑁 ≠ 1)) | |
| 2 | 1 | simprbi 275 | . . 3 ⊢ (𝑁 ∈ (ℤ≥‘2) → 𝑁 ≠ 1) |
| 3 | 2 | adantl 277 | . 2 ⊢ ((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) → 𝑁 ≠ 1) |
| 4 | eluzelz 9881 | . . . . . . . 8 ⊢ (𝑁 ∈ (ℤ≥‘2) → 𝑁 ∈ ℤ) | |
| 5 | 4 | ad2antlr 489 | . . . . . . 7 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) ∧ (𝐴↑𝑁) ∈ ℙ) → 𝑁 ∈ ℤ) |
| 6 | simpr 110 | . . . . . . . 8 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) ∧ (𝐴↑𝑁) ∈ ℙ) → (𝐴↑𝑁) ∈ ℙ) | |
| 7 | simpll 527 | . . . . . . . 8 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) ∧ (𝐴↑𝑁) ∈ ℙ) → 𝐴 ∈ ℚ) | |
| 8 | prmnn 12832 | . . . . . . . . . . . 12 ⊢ ((𝐴↑𝑁) ∈ ℙ → (𝐴↑𝑁) ∈ ℕ) | |
| 9 | 8 | adantl 277 | . . . . . . . . . . 11 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) ∧ (𝐴↑𝑁) ∈ ℙ) → (𝐴↑𝑁) ∈ ℕ) |
| 10 | 9 | nnne0d 9299 | . . . . . . . . . 10 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) ∧ (𝐴↑𝑁) ∈ ℙ) → (𝐴↑𝑁) ≠ 0) |
| 11 | eluz2nn 9916 | . . . . . . . . . . . 12 ⊢ (𝑁 ∈ (ℤ≥‘2) → 𝑁 ∈ ℕ) | |
| 12 | 11 | ad2antlr 489 | . . . . . . . . . . 11 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) ∧ (𝐴↑𝑁) ∈ ℙ) → 𝑁 ∈ ℕ) |
| 13 | 12 | 0expd 11076 | . . . . . . . . . 10 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) ∧ (𝐴↑𝑁) ∈ ℙ) → (0↑𝑁) = 0) |
| 14 | 10, 13 | neeqtrrd 2444 | . . . . . . . . 9 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) ∧ (𝐴↑𝑁) ∈ ℙ) → (𝐴↑𝑁) ≠ (0↑𝑁)) |
| 15 | oveq1 6065 | . . . . . . . . . 10 ⊢ (𝐴 = 0 → (𝐴↑𝑁) = (0↑𝑁)) | |
| 16 | 15 | necon3i 2462 | . . . . . . . . 9 ⊢ ((𝐴↑𝑁) ≠ (0↑𝑁) → 𝐴 ≠ 0) |
| 17 | 14, 16 | syl 14 | . . . . . . . 8 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) ∧ (𝐴↑𝑁) ∈ ℙ) → 𝐴 ≠ 0) |
| 18 | pcqcl 13029 | . . . . . . . 8 ⊢ (((𝐴↑𝑁) ∈ ℙ ∧ (𝐴 ∈ ℚ ∧ 𝐴 ≠ 0)) → ((𝐴↑𝑁) pCnt 𝐴) ∈ ℤ) | |
| 19 | 6, 7, 17, 18 | syl12anc 1272 | . . . . . . 7 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) ∧ (𝐴↑𝑁) ∈ ℙ) → ((𝐴↑𝑁) pCnt 𝐴) ∈ ℤ) |
| 20 | dvdsmul1 12524 | . . . . . . 7 ⊢ ((𝑁 ∈ ℤ ∧ ((𝐴↑𝑁) pCnt 𝐴) ∈ ℤ) → 𝑁 ∥ (𝑁 · ((𝐴↑𝑁) pCnt 𝐴))) | |
| 21 | 5, 19, 20 | syl2anc 411 | . . . . . 6 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) ∧ (𝐴↑𝑁) ∈ ℙ) → 𝑁 ∥ (𝑁 · ((𝐴↑𝑁) pCnt 𝐴))) |
| 22 | 9 | nncnd 9268 | . . . . . . . . 9 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) ∧ (𝐴↑𝑁) ∈ ℙ) → (𝐴↑𝑁) ∈ ℂ) |
| 23 | 22 | exp1d 11055 | . . . . . . . 8 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) ∧ (𝐴↑𝑁) ∈ ℙ) → ((𝐴↑𝑁)↑1) = (𝐴↑𝑁)) |
| 24 | 23 | oveq2d 6074 | . . . . . . 7 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) ∧ (𝐴↑𝑁) ∈ ℙ) → ((𝐴↑𝑁) pCnt ((𝐴↑𝑁)↑1)) = ((𝐴↑𝑁) pCnt (𝐴↑𝑁))) |
| 25 | 1z 9620 | . . . . . . . 8 ⊢ 1 ∈ ℤ | |
| 26 | pcid 13047 | . . . . . . . 8 ⊢ (((𝐴↑𝑁) ∈ ℙ ∧ 1 ∈ ℤ) → ((𝐴↑𝑁) pCnt ((𝐴↑𝑁)↑1)) = 1) | |
| 27 | 6, 25, 26 | sylancl 413 | . . . . . . 7 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) ∧ (𝐴↑𝑁) ∈ ℙ) → ((𝐴↑𝑁) pCnt ((𝐴↑𝑁)↑1)) = 1) |
| 28 | pcexp 13032 | . . . . . . . 8 ⊢ (((𝐴↑𝑁) ∈ ℙ ∧ (𝐴 ∈ ℚ ∧ 𝐴 ≠ 0) ∧ 𝑁 ∈ ℤ) → ((𝐴↑𝑁) pCnt (𝐴↑𝑁)) = (𝑁 · ((𝐴↑𝑁) pCnt 𝐴))) | |
| 29 | 6, 7, 17, 5, 28 | syl121anc 1279 | . . . . . . 7 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) ∧ (𝐴↑𝑁) ∈ ℙ) → ((𝐴↑𝑁) pCnt (𝐴↑𝑁)) = (𝑁 · ((𝐴↑𝑁) pCnt 𝐴))) |
| 30 | 24, 27, 29 | 3eqtr3rd 2276 | . . . . . 6 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) ∧ (𝐴↑𝑁) ∈ ℙ) → (𝑁 · ((𝐴↑𝑁) pCnt 𝐴)) = 1) |
| 31 | 21, 30 | breqtrd 4140 | . . . . 5 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) ∧ (𝐴↑𝑁) ∈ ℙ) → 𝑁 ∥ 1) |
| 32 | 31 | ex 115 | . . . 4 ⊢ ((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) → ((𝐴↑𝑁) ∈ ℙ → 𝑁 ∥ 1)) |
| 33 | 11 | adantl 277 | . . . . . 6 ⊢ ((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) → 𝑁 ∈ ℕ) |
| 34 | 33 | nnnn0d 9570 | . . . . 5 ⊢ ((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) → 𝑁 ∈ ℕ0) |
| 35 | dvds1 12564 | . . . . 5 ⊢ (𝑁 ∈ ℕ0 → (𝑁 ∥ 1 ↔ 𝑁 = 1)) | |
| 36 | 34, 35 | syl 14 | . . . 4 ⊢ ((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) → (𝑁 ∥ 1 ↔ 𝑁 = 1)) |
| 37 | 32, 36 | sylibd 149 | . . 3 ⊢ ((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) → ((𝐴↑𝑁) ∈ ℙ → 𝑁 = 1)) |
| 38 | 37 | necon3ad 2456 | . 2 ⊢ ((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) → (𝑁 ≠ 1 → ¬ (𝐴↑𝑁) ∈ ℙ)) |
| 39 | 3, 38 | mpd 13 | 1 ⊢ ((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) → ¬ (𝐴↑𝑁) ∈ ℙ) |
| Colors of variables: wff set class |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 104 ↔ wb 105 = wceq 1398 ∈ wcel 2205 ≠ wne 2414 class class class wbr 4114 ‘cfv 5357 (class class class)co 6058 0cc0 8143 1c1 8144 · cmul 8148 ℕcn 9254 2c2 9305 ℕ0cn0 9513 ℤcz 9594 ℤ≥cuz 9871 ℚcq 9969 ↑cexp 10924 ∥ cdvds 12498 ℙcprime 12829 pCnt cpc 13007 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2207 ax-14 2208 ax-ext 2216 ax-coll 4230 ax-sep 4233 ax-nul 4241 ax-pow 4292 ax-pr 4327 ax-un 4559 ax-setind 4664 ax-iinf 4715 ax-cnex 8234 ax-resscn 8235 ax-1cn 8236 ax-1re 8237 ax-icn 8238 ax-addcl 8239 ax-addrcl 8240 ax-mulcl 8241 ax-mulrcl 8242 ax-addcom 8243 ax-mulcom 8244 ax-addass 8245 ax-mulass 8246 ax-distr 8247 ax-i2m1 8248 ax-0lt1 8249 ax-1rid 8250 ax-0id 8251 ax-rnegex 8252 ax-precex 8253 ax-cnre 8254 ax-pre-ltirr 8255 ax-pre-ltwlin 8256 ax-pre-lttrn 8257 ax-pre-apti 8258 ax-pre-ltadd 8259 ax-pre-mulgt0 8260 ax-pre-mulext 8261 ax-arch 8262 ax-caucvg 8263 |
| This theorem depends on definitions: df-bi 117 df-stab 839 df-dc 843 df-3or 1006 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2085 df-mo 2086 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ne 2415 df-nel 2510 df-ral 2527 df-rex 2528 df-reu 2529 df-rmo 2530 df-rab 2531 df-v 2817 df-sbc 3046 df-csb 3142 df-dif 3216 df-un 3218 df-in 3220 df-ss 3227 df-nul 3513 df-if 3625 df-pw 3676 df-sn 3700 df-pr 3701 df-op 3703 df-uni 3920 df-int 3955 df-iun 3998 df-br 4115 df-opab 4177 df-mpt 4178 df-tr 4214 df-id 4419 df-po 4422 df-iso 4423 df-iord 4492 df-on 4494 df-ilim 4495 df-suc 4497 df-iom 4718 df-xp 4760 df-rel 4761 df-cnv 4762 df-co 4763 df-dm 4764 df-rn 4765 df-res 4766 df-ima 4767 df-iota 5317 df-fun 5359 df-fn 5360 df-f 5361 df-f1 5362 df-fo 5363 df-f1o 5364 df-fv 5365 df-isom 5366 df-riota 6011 df-ov 6061 df-oprab 6062 df-mpo 6063 df-1st 6347 df-2nd 6348 df-recs 6549 df-frec 6635 df-1o 6660 df-2o 6661 df-er 6780 df-en 6989 df-sup 7288 df-inf 7289 df-pnf 8326 df-mnf 8327 df-xr 8328 df-ltxr 8329 df-le 8330 df-sub 8462 df-neg 8463 df-reap 8866 df-ap 8873 df-div 8964 df-inn 9255 df-2 9313 df-3 9314 df-4 9315 df-n0 9514 df-z 9595 df-uz 9872 df-q 9970 df-rp 10005 df-fz 10362 df-fzo 10499 df-fl 10654 df-mod 10709 df-seqfrec 10834 df-exp 10925 df-cj 11552 df-re 11553 df-im 11554 df-rsqrt 11708 df-abs 11709 df-dvds 12499 df-gcd 12675 df-prm 12830 df-pc 13008 |
| This theorem is referenced by: (None) |
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