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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 9881 | . . . 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 9808 | . . . . . . . 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 12743 | . . . . . . . . . . . 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 9231 | . . . . . . . . . 10 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) ∧ (𝐴↑𝑁) ∈ ℙ) → (𝐴↑𝑁) ≠ 0) |
| 11 | eluz2nn 9843 | . . . . . . . . . . . 12 ⊢ (𝑁 ∈ (ℤ≥‘2) → 𝑁 ∈ ℕ) | |
| 12 | 11 | ad2antlr 489 | . . . . . . . . . . 11 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) ∧ (𝐴↑𝑁) ∈ ℙ) → 𝑁 ∈ ℕ) |
| 13 | 12 | 0expd 10995 | . . . . . . . . . 10 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) ∧ (𝐴↑𝑁) ∈ ℙ) → (0↑𝑁) = 0) |
| 14 | 10, 13 | neeqtrrd 2433 | . . . . . . . . 9 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) ∧ (𝐴↑𝑁) ∈ ℙ) → (𝐴↑𝑁) ≠ (0↑𝑁)) |
| 15 | oveq1 6035 | . . . . . . . . . 10 ⊢ (𝐴 = 0 → (𝐴↑𝑁) = (0↑𝑁)) | |
| 16 | 15 | necon3i 2451 | . . . . . . . . 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 12940 | . . . . . . . 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 12435 | . . . . . . 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 9200 | . . . . . . . . 9 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) ∧ (𝐴↑𝑁) ∈ ℙ) → (𝐴↑𝑁) ∈ ℂ) |
| 23 | 22 | exp1d 10974 | . . . . . . . 8 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) ∧ (𝐴↑𝑁) ∈ ℙ) → ((𝐴↑𝑁)↑1) = (𝐴↑𝑁)) |
| 24 | 23 | oveq2d 6044 | . . . . . . 7 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) ∧ (𝐴↑𝑁) ∈ ℙ) → ((𝐴↑𝑁) pCnt ((𝐴↑𝑁)↑1)) = ((𝐴↑𝑁) pCnt (𝐴↑𝑁))) |
| 25 | 1z 9548 | . . . . . . . 8 ⊢ 1 ∈ ℤ | |
| 26 | pcid 12958 | . . . . . . . 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 12943 | . . . . . . . 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 2273 | . . . . . 6 ⊢ (((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) ∧ (𝐴↑𝑁) ∈ ℙ) → (𝑁 · ((𝐴↑𝑁) pCnt 𝐴)) = 1) |
| 31 | 21, 30 | breqtrd 4119 | . . . . 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 9498 | . . . . 5 ⊢ ((𝐴 ∈ ℚ ∧ 𝑁 ∈ (ℤ≥‘2)) → 𝑁 ∈ ℕ0) |
| 35 | dvds1 12475 | . . . . 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 2445 | . 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 2202 ≠ wne 2403 class class class wbr 4093 ‘cfv 5333 (class class class)co 6028 0cc0 8075 1c1 8076 · cmul 8080 ℕcn 9186 2c2 9237 ℕ0cn0 9445 ℤcz 9522 ℤ≥cuz 9798 ℚcq 9896 ↑cexp 10844 ∥ cdvds 12409 ℙcprime 12740 pCnt cpc 12918 |
| 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 2204 ax-14 2205 ax-ext 2213 ax-coll 4209 ax-sep 4212 ax-nul 4220 ax-pow 4270 ax-pr 4305 ax-un 4536 ax-setind 4641 ax-iinf 4692 ax-cnex 8166 ax-resscn 8167 ax-1cn 8168 ax-1re 8169 ax-icn 8170 ax-addcl 8171 ax-addrcl 8172 ax-mulcl 8173 ax-mulrcl 8174 ax-addcom 8175 ax-mulcom 8176 ax-addass 8177 ax-mulass 8178 ax-distr 8179 ax-i2m1 8180 ax-0lt1 8181 ax-1rid 8182 ax-0id 8183 ax-rnegex 8184 ax-precex 8185 ax-cnre 8186 ax-pre-ltirr 8187 ax-pre-ltwlin 8188 ax-pre-lttrn 8189 ax-pre-apti 8190 ax-pre-ltadd 8191 ax-pre-mulgt0 8192 ax-pre-mulext 8193 ax-arch 8194 ax-caucvg 8195 |
| 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 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ne 2404 df-nel 2499 df-ral 2516 df-rex 2517 df-reu 2518 df-rmo 2519 df-rab 2520 df-v 2805 df-sbc 3033 df-csb 3129 df-dif 3203 df-un 3205 df-in 3207 df-ss 3214 df-nul 3497 df-if 3608 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 df-uni 3899 df-int 3934 df-iun 3977 df-br 4094 df-opab 4156 df-mpt 4157 df-tr 4193 df-id 4396 df-po 4399 df-iso 4400 df-iord 4469 df-on 4471 df-ilim 4472 df-suc 4474 df-iom 4695 df-xp 4737 df-rel 4738 df-cnv 4739 df-co 4740 df-dm 4741 df-rn 4742 df-res 4743 df-ima 4744 df-iota 5293 df-fun 5335 df-fn 5336 df-f 5337 df-f1 5338 df-fo 5339 df-f1o 5340 df-fv 5341 df-isom 5342 df-riota 5981 df-ov 6031 df-oprab 6032 df-mpo 6033 df-1st 6312 df-2nd 6313 df-recs 6514 df-frec 6600 df-1o 6625 df-2o 6626 df-er 6745 df-en 6953 df-sup 7226 df-inf 7227 df-pnf 8259 df-mnf 8260 df-xr 8261 df-ltxr 8262 df-le 8263 df-sub 8395 df-neg 8396 df-reap 8798 df-ap 8805 df-div 8896 df-inn 9187 df-2 9245 df-3 9246 df-4 9247 df-n0 9446 df-z 9523 df-uz 9799 df-q 9897 df-rp 9932 df-fz 10287 df-fzo 10421 df-fl 10574 df-mod 10629 df-seqfrec 10754 df-exp 10845 df-cj 11463 df-re 11464 df-im 11465 df-rsqrt 11619 df-abs 11620 df-dvds 12410 df-gcd 12586 df-prm 12741 df-pc 12919 |
| This theorem is referenced by: (None) |
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