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| Mirrors > Home > MPE Home > Th. List > sqnprm | Structured version Visualization version GIF version | ||
| Description: A square is never prime. (Contributed by Mario Carneiro, 20-Jun-2015.) |
| Ref | Expression |
|---|---|
| sqnprm | ⊢ (𝐴 ∈ ℤ → ¬ (𝐴↑2) ∈ ℙ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | zre 12690 | . . . . . 6 ⊢ (𝐴 ∈ ℤ → 𝐴 ∈ ℝ) | |
| 2 | 1 | adantr 486 | . . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ (𝐴↑2) ∈ ℙ) → 𝐴 ∈ ℝ) |
| 3 | absresq 15462 | . . . . 5 ⊢ (𝐴 ∈ ℝ → ((abs‘𝐴)↑2) = (𝐴↑2)) | |
| 4 | 2, 3 | syl 18 | . . . 4 ⊢ ((𝐴 ∈ ℤ ∧ (𝐴↑2) ∈ ℙ) → ((abs‘𝐴)↑2) = (𝐴↑2)) |
| 5 | 2 | recnd 11330 | . . . . . . 7 ⊢ ((𝐴 ∈ ℤ ∧ (𝐴↑2) ∈ ℙ) → 𝐴 ∈ ℂ) |
| 6 | 5 | abscld 15599 | . . . . . 6 ⊢ ((𝐴 ∈ ℤ ∧ (𝐴↑2) ∈ ℙ) → (abs‘𝐴) ∈ ℝ) |
| 7 | 6 | recnd 11330 | . . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ (𝐴↑2) ∈ ℙ) → (abs‘𝐴) ∈ ℂ) |
| 8 | 7 | sqvald 14279 | . . . 4 ⊢ ((𝐴 ∈ ℤ ∧ (𝐴↑2) ∈ ℙ) → ((abs‘𝐴)↑2) = ((abs‘𝐴) · (abs‘𝐴))) |
| 9 | 4, 8 | eqtr3d 2798 | . . 3 ⊢ ((𝐴 ∈ ℤ ∧ (𝐴↑2) ∈ ℙ) → (𝐴↑2) = ((abs‘𝐴) · (abs‘𝐴))) |
| 10 | simpr 490 | . . 3 ⊢ ((𝐴 ∈ ℤ ∧ (𝐴↑2) ∈ ℙ) → (𝐴↑2) ∈ ℙ) | |
| 11 | 9, 10 | eqeltrrd 2862 | . 2 ⊢ ((𝐴 ∈ ℤ ∧ (𝐴↑2) ∈ ℙ) → ((abs‘𝐴) · (abs‘𝐴)) ∈ ℙ) |
| 12 | nn0abscl 15472 | . . . . . 6 ⊢ (𝐴 ∈ ℤ → (abs‘𝐴) ∈ ℕ0) | |
| 13 | 12 | adantr 486 | . . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ (𝐴↑2) ∈ ℙ) → (abs‘𝐴) ∈ ℕ0) |
| 14 | 13 | nn0zd 12711 | . . . 4 ⊢ ((𝐴 ∈ ℤ ∧ (𝐴↑2) ∈ ℙ) → (abs‘𝐴) ∈ ℤ) |
| 15 | sq1 14331 | . . . . . 6 ⊢ (1↑2) = 1 | |
| 16 | prmuz2 16864 | . . . . . . . . 9 ⊢ ((𝐴↑2) ∈ ℙ → (𝐴↑2) ∈ (ℤ≥‘2)) | |
| 17 | 16 | adantl 487 | . . . . . . . 8 ⊢ ((𝐴 ∈ ℤ ∧ (𝐴↑2) ∈ ℙ) → (𝐴↑2) ∈ (ℤ≥‘2)) |
| 18 | eluz2gt1 13040 | . . . . . . . 8 ⊢ ((𝐴↑2) ∈ (ℤ≥‘2) → 1 < (𝐴↑2)) | |
| 19 | 17, 18 | syl 18 | . . . . . . 7 ⊢ ((𝐴 ∈ ℤ ∧ (𝐴↑2) ∈ ℙ) → 1 < (𝐴↑2)) |
| 20 | 19, 4 | breqtrrd 5133 | . . . . . 6 ⊢ ((𝐴 ∈ ℤ ∧ (𝐴↑2) ∈ ℙ) → 1 < ((abs‘𝐴)↑2)) |
| 21 | 15, 20 | eqbrtrid 5140 | . . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ (𝐴↑2) ∈ ℙ) → (1↑2) < ((abs‘𝐴)↑2)) |
| 22 | 5 | absge0d 15607 | . . . . . 6 ⊢ ((𝐴 ∈ ℤ ∧ (𝐴↑2) ∈ ℙ) → 0 ≤ (abs‘𝐴)) |
| 23 | 1re 11301 | . . . . . . 7 ⊢ 1 ∈ ℝ | |
| 24 | 0le1 11832 | . . . . . . 7 ⊢ 0 ≤ 1 | |
| 25 | lt2sq 14269 | . . . . . . 7 ⊢ (((1 ∈ ℝ ∧ 0 ≤ 1) ∧ ((abs‘𝐴) ∈ ℝ ∧ 0 ≤ (abs‘𝐴))) → (1 < (abs‘𝐴) ↔ (1↑2) < ((abs‘𝐴)↑2))) | |
| 26 | 23, 24, 25 | mpanl12 715 | . . . . . 6 ⊢ (((abs‘𝐴) ∈ ℝ ∧ 0 ≤ (abs‘𝐴)) → (1 < (abs‘𝐴) ↔ (1↑2) < ((abs‘𝐴)↑2))) |
| 27 | 6, 22, 26 | syl2anc 596 | . . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ (𝐴↑2) ∈ ℙ) → (1 < (abs‘𝐴) ↔ (1↑2) < ((abs‘𝐴)↑2))) |
| 28 | 21, 27 | mpbird 260 | . . . 4 ⊢ ((𝐴 ∈ ℤ ∧ (𝐴↑2) ∈ ℙ) → 1 < (abs‘𝐴)) |
| 29 | eluz2b1 13039 | . . . 4 ⊢ ((abs‘𝐴) ∈ (ℤ≥‘2) ↔ ((abs‘𝐴) ∈ ℤ ∧ 1 < (abs‘𝐴))) | |
| 30 | 14, 28, 29 | sylanbrc 595 | . . 3 ⊢ ((𝐴 ∈ ℤ ∧ (𝐴↑2) ∈ ℙ) → (abs‘𝐴) ∈ (ℤ≥‘2)) |
| 31 | nprm 16856 | . . 3 ⊢ (((abs‘𝐴) ∈ (ℤ≥‘2) ∧ (abs‘𝐴) ∈ (ℤ≥‘2)) → ¬ ((abs‘𝐴) · (abs‘𝐴)) ∈ ℙ) | |
| 32 | 30, 30, 31 | syl2anc 596 | . 2 ⊢ ((𝐴 ∈ ℤ ∧ (𝐴↑2) ∈ ℙ) → ¬ ((abs‘𝐴) · (abs‘𝐴)) ∈ ℙ) |
| 33 | 11, 32 | pm2.65da 829 | 1 ⊢ (𝐴 ∈ ℤ → ¬ (𝐴↑2) ∈ ℙ) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 401 = wceq 1570 ∈ wcel 2145 class class class wbr 5103 ‘cfv 6537 (class class class)co 7418 ℝcr 11192 0cc0 11193 1c1 11194 · cmul 11198 < clt 11336 ≤ cle 11337 2c2 12390 ℕ0cn0 12599 ℤcz 12686 ℤ≥cuz 12958 ↑cexp 14197 abscabs 15394 ℙcprime 16839 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7749 ax-cnex 11249 ax-resscn 11250 ax-1cn 11251 ax-icn 11252 ax-addcl 11253 ax-addrcl 11254 ax-mulcl 11255 ax-mulrcl 11256 ax-mulcom 11257 ax-addass 11258 ax-mulass 11259 ax-distr 11260 ax-i2m1 11261 ax-1ne0 11262 ax-1rid 11263 ax-rnegex 11264 ax-rrecex 11265 ax-cnre 11266 ax-pre-lttri 11267 ax-pre-lttrn 11268 ax-pre-ltadd 11269 ax-pre-mulgt0 11270 ax-pre-sup 11271 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7375 df-ov 7421 df-oprab 7422 df-mpo 7423 df-om 7876 df-2nd 8000 df-frecs 8292 df-wrecs 8323 df-recs 8372 df-rdg 8411 df-1o 8469 df-2o 8470 df-er 8710 df-en 8967 df-dom 8968 df-sdom 8969 df-fin 8970 df-sup 9427 df-pnf 11338 df-mnf 11339 df-xr 11340 df-ltxr 11341 df-le 11342 df-sub 11536 df-neg 11537 df-div 11967 df-nn 12329 df-2 12398 df-3 12399 df-n0 12600 df-z 12687 df-uz 12959 df-rp 13114 df-seq 14138 df-exp 14198 df-cj 15259 df-re 15260 df-im 15261 df-sqrt 15395 df-abs 15396 df-dvds 16416 df-prm 16840 |
| This theorem is used by: 2sqblem 27751 2sqn0 27754 2sqcoprm 27755 2sqnn 27759 |
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