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| Mirrors > Home > MPE Home > Th. List > 2sqn0 | Structured version Visualization version GIF version | ||
| Description: If the sum of two squares is prime, none of the original number is zero. (Contributed by Thierry Arnoux, 4-Feb-2020.) |
| Ref | Expression |
|---|---|
| 2sqcoprm.1 | ⊢ (𝜑 → 𝑃 ∈ ℙ) |
| 2sqcoprm.2 | ⊢ (𝜑 → 𝐴 ∈ ℤ) |
| 2sqcoprm.3 | ⊢ (𝜑 → 𝐵 ∈ ℤ) |
| 2sqcoprm.4 | ⊢ (𝜑 → ((𝐴↑2) + (𝐵↑2)) = 𝑃) |
| Ref | Expression |
|---|---|
| 2sqn0 | ⊢ (𝜑 → 𝐴 ≠ 0) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2sqcoprm.4 | . . . . 5 ⊢ (𝜑 → ((𝐴↑2) + (𝐵↑2)) = 𝑃) | |
| 2 | 2sqcoprm.1 | . . . . 5 ⊢ (𝜑 → 𝑃 ∈ ℙ) | |
| 3 | 1, 2 | eqeltrd 2834 | . . . 4 ⊢ (𝜑 → ((𝐴↑2) + (𝐵↑2)) ∈ ℙ) |
| 4 | 3 | adantr 480 | . . 3 ⊢ ((𝜑 ∧ 𝐴 = 0) → ((𝐴↑2) + (𝐵↑2)) ∈ ℙ) |
| 5 | sq0i 14114 | . . . . . 6 ⊢ (𝐴 = 0 → (𝐴↑2) = 0) | |
| 6 | 5 | oveq1d 7371 | . . . . 5 ⊢ (𝐴 = 0 → ((𝐴↑2) + (𝐵↑2)) = (0 + (𝐵↑2))) |
| 7 | 2sqcoprm.3 | . . . . . . . 8 ⊢ (𝜑 → 𝐵 ∈ ℤ) | |
| 8 | 7 | zcnd 12595 | . . . . . . 7 ⊢ (𝜑 → 𝐵 ∈ ℂ) |
| 9 | 8 | sqcld 14065 | . . . . . 6 ⊢ (𝜑 → (𝐵↑2) ∈ ℂ) |
| 10 | 9 | addlidd 11332 | . . . . 5 ⊢ (𝜑 → (0 + (𝐵↑2)) = (𝐵↑2)) |
| 11 | 6, 10 | sylan9eqr 2791 | . . . 4 ⊢ ((𝜑 ∧ 𝐴 = 0) → ((𝐴↑2) + (𝐵↑2)) = (𝐵↑2)) |
| 12 | sqnprm 16627 | . . . . . 6 ⊢ (𝐵 ∈ ℤ → ¬ (𝐵↑2) ∈ ℙ) | |
| 13 | 7, 12 | syl 17 | . . . . 5 ⊢ (𝜑 → ¬ (𝐵↑2) ∈ ℙ) |
| 14 | 13 | adantr 480 | . . . 4 ⊢ ((𝜑 ∧ 𝐴 = 0) → ¬ (𝐵↑2) ∈ ℙ) |
| 15 | 11, 14 | eqneltrd 2854 | . . 3 ⊢ ((𝜑 ∧ 𝐴 = 0) → ¬ ((𝐴↑2) + (𝐵↑2)) ∈ ℙ) |
| 16 | 4, 15 | pm2.65da 816 | . 2 ⊢ (𝜑 → ¬ 𝐴 = 0) |
| 17 | 16 | neqned 2937 | 1 ⊢ (𝜑 → 𝐴 ≠ 0) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 = wceq 1541 ∈ wcel 2113 ≠ wne 2930 (class class class)co 7356 0cc0 11024 + caddc 11027 2c2 12198 ℤcz 12486 ↑cexp 13982 ℙcprime 16596 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2706 ax-sep 5239 ax-nul 5249 ax-pow 5308 ax-pr 5375 ax-un 7678 ax-cnex 11080 ax-resscn 11081 ax-1cn 11082 ax-icn 11083 ax-addcl 11084 ax-addrcl 11085 ax-mulcl 11086 ax-mulrcl 11087 ax-mulcom 11088 ax-addass 11089 ax-mulass 11090 ax-distr 11091 ax-i2m1 11092 ax-1ne0 11093 ax-1rid 11094 ax-rnegex 11095 ax-rrecex 11096 ax-cnre 11097 ax-pre-lttri 11098 ax-pre-lttrn 11099 ax-pre-ltadd 11100 ax-pre-mulgt0 11101 ax-pre-sup 11102 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2809 df-nfc 2883 df-ne 2931 df-nel 3035 df-ral 3050 df-rex 3059 df-rmo 3348 df-reu 3349 df-rab 3398 df-v 3440 df-sbc 3739 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-iun 4946 df-br 5097 df-opab 5159 df-mpt 5178 df-tr 5204 df-id 5517 df-eprel 5522 df-po 5530 df-so 5531 df-fr 5575 df-we 5577 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-pred 6257 df-ord 6318 df-on 6319 df-lim 6320 df-suc 6321 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 df-riota 7313 df-ov 7359 df-oprab 7360 df-mpo 7361 df-om 7807 df-2nd 7932 df-frecs 8221 df-wrecs 8252 df-recs 8301 df-rdg 8339 df-1o 8395 df-2o 8396 df-er 8633 df-en 8882 df-dom 8883 df-sdom 8884 df-fin 8885 df-sup 9343 df-pnf 11166 df-mnf 11167 df-xr 11168 df-ltxr 11169 df-le 11170 df-sub 11364 df-neg 11365 df-div 11793 df-nn 12144 df-2 12206 df-3 12207 df-n0 12400 df-z 12487 df-uz 12750 df-rp 12904 df-seq 13923 df-exp 13983 df-cj 15020 df-re 15021 df-im 15022 df-sqrt 15156 df-abs 15157 df-dvds 16178 df-prm 16597 |
| This theorem is referenced by: 2sqcoprm 27400 2sqmod 27401 |
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