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| Mirrors > Home > MPE Home > Th. List > prime | Structured version Visualization version GIF version | ||
| Description: Two ways to express "𝐴 is a prime number (or 1)". See also isprm 16633. (Contributed by NM, 4-May-2005.) |
| Ref | Expression |
|---|---|
| prime | ⊢ (𝐴 ∈ ℕ → (∀𝑥 ∈ ℕ ((𝐴 / 𝑥) ∈ ℕ → (𝑥 = 1 ∨ 𝑥 = 𝐴)) ↔ ∀𝑥 ∈ ℕ ((1 < 𝑥 ∧ 𝑥 ≤ 𝐴 ∧ (𝐴 / 𝑥) ∈ ℕ) → 𝑥 = 𝐴))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | bi2.04 387 | . . . 4 ⊢ ((𝑥 ≠ 1 → ((𝐴 / 𝑥) ∈ ℕ → 𝑥 = 𝐴)) ↔ ((𝐴 / 𝑥) ∈ ℕ → (𝑥 ≠ 1 → 𝑥 = 𝐴))) | |
| 2 | impexp 450 | . . . 4 ⊢ (((𝑥 ≠ 1 ∧ (𝐴 / 𝑥) ∈ ℕ) → 𝑥 = 𝐴) ↔ (𝑥 ≠ 1 → ((𝐴 / 𝑥) ∈ ℕ → 𝑥 = 𝐴))) | |
| 3 | neor 3025 | . . . . 5 ⊢ ((𝑥 = 1 ∨ 𝑥 = 𝐴) ↔ (𝑥 ≠ 1 → 𝑥 = 𝐴)) | |
| 4 | 3 | imbi2i 336 | . . . 4 ⊢ (((𝐴 / 𝑥) ∈ ℕ → (𝑥 = 1 ∨ 𝑥 = 𝐴)) ↔ ((𝐴 / 𝑥) ∈ ℕ → (𝑥 ≠ 1 → 𝑥 = 𝐴))) |
| 5 | 1, 2, 4 | 3bitr4ri 304 | . . 3 ⊢ (((𝐴 / 𝑥) ∈ ℕ → (𝑥 = 1 ∨ 𝑥 = 𝐴)) ↔ ((𝑥 ≠ 1 ∧ (𝐴 / 𝑥) ∈ ℕ) → 𝑥 = 𝐴)) |
| 6 | nngt1ne1 12197 | . . . . . . 7 ⊢ (𝑥 ∈ ℕ → (1 < 𝑥 ↔ 𝑥 ≠ 1)) | |
| 7 | 6 | adantl 481 | . . . . . 6 ⊢ ((𝐴 ∈ ℕ ∧ 𝑥 ∈ ℕ) → (1 < 𝑥 ↔ 𝑥 ≠ 1)) |
| 8 | 7 | anbi1d 632 | . . . . 5 ⊢ ((𝐴 ∈ ℕ ∧ 𝑥 ∈ ℕ) → ((1 < 𝑥 ∧ (𝐴 / 𝑥) ∈ ℕ) ↔ (𝑥 ≠ 1 ∧ (𝐴 / 𝑥) ∈ ℕ))) |
| 9 | nnz 12536 | . . . . . . . . 9 ⊢ ((𝐴 / 𝑥) ∈ ℕ → (𝐴 / 𝑥) ∈ ℤ) | |
| 10 | nnre 12172 | . . . . . . . . . . . . 13 ⊢ (𝑥 ∈ ℕ → 𝑥 ∈ ℝ) | |
| 11 | gtndiv 12597 | . . . . . . . . . . . . . 14 ⊢ ((𝑥 ∈ ℝ ∧ 𝐴 ∈ ℕ ∧ 𝐴 < 𝑥) → ¬ (𝐴 / 𝑥) ∈ ℤ) | |
| 12 | 11 | 3expia 1122 | . . . . . . . . . . . . 13 ⊢ ((𝑥 ∈ ℝ ∧ 𝐴 ∈ ℕ) → (𝐴 < 𝑥 → ¬ (𝐴 / 𝑥) ∈ ℤ)) |
| 13 | 10, 12 | sylan 581 | . . . . . . . . . . . 12 ⊢ ((𝑥 ∈ ℕ ∧ 𝐴 ∈ ℕ) → (𝐴 < 𝑥 → ¬ (𝐴 / 𝑥) ∈ ℤ)) |
| 14 | 13 | con2d 134 | . . . . . . . . . . 11 ⊢ ((𝑥 ∈ ℕ ∧ 𝐴 ∈ ℕ) → ((𝐴 / 𝑥) ∈ ℤ → ¬ 𝐴 < 𝑥)) |
| 15 | nnre 12172 | . . . . . . . . . . . 12 ⊢ (𝐴 ∈ ℕ → 𝐴 ∈ ℝ) | |
| 16 | lenlt 11215 | . . . . . . . . . . . 12 ⊢ ((𝑥 ∈ ℝ ∧ 𝐴 ∈ ℝ) → (𝑥 ≤ 𝐴 ↔ ¬ 𝐴 < 𝑥)) | |
| 17 | 10, 15, 16 | syl2an 597 | . . . . . . . . . . 11 ⊢ ((𝑥 ∈ ℕ ∧ 𝐴 ∈ ℕ) → (𝑥 ≤ 𝐴 ↔ ¬ 𝐴 < 𝑥)) |
| 18 | 14, 17 | sylibrd 259 | . . . . . . . . . 10 ⊢ ((𝑥 ∈ ℕ ∧ 𝐴 ∈ ℕ) → ((𝐴 / 𝑥) ∈ ℤ → 𝑥 ≤ 𝐴)) |
| 19 | 18 | ancoms 458 | . . . . . . . . 9 ⊢ ((𝐴 ∈ ℕ ∧ 𝑥 ∈ ℕ) → ((𝐴 / 𝑥) ∈ ℤ → 𝑥 ≤ 𝐴)) |
| 20 | 9, 19 | syl5 34 | . . . . . . . 8 ⊢ ((𝐴 ∈ ℕ ∧ 𝑥 ∈ ℕ) → ((𝐴 / 𝑥) ∈ ℕ → 𝑥 ≤ 𝐴)) |
| 21 | 20 | pm4.71rd 562 | . . . . . . 7 ⊢ ((𝐴 ∈ ℕ ∧ 𝑥 ∈ ℕ) → ((𝐴 / 𝑥) ∈ ℕ ↔ (𝑥 ≤ 𝐴 ∧ (𝐴 / 𝑥) ∈ ℕ))) |
| 22 | 21 | anbi2d 631 | . . . . . 6 ⊢ ((𝐴 ∈ ℕ ∧ 𝑥 ∈ ℕ) → ((1 < 𝑥 ∧ (𝐴 / 𝑥) ∈ ℕ) ↔ (1 < 𝑥 ∧ (𝑥 ≤ 𝐴 ∧ (𝐴 / 𝑥) ∈ ℕ)))) |
| 23 | 3anass 1095 | . . . . . 6 ⊢ ((1 < 𝑥 ∧ 𝑥 ≤ 𝐴 ∧ (𝐴 / 𝑥) ∈ ℕ) ↔ (1 < 𝑥 ∧ (𝑥 ≤ 𝐴 ∧ (𝐴 / 𝑥) ∈ ℕ))) | |
| 24 | 22, 23 | bitr4di 289 | . . . . 5 ⊢ ((𝐴 ∈ ℕ ∧ 𝑥 ∈ ℕ) → ((1 < 𝑥 ∧ (𝐴 / 𝑥) ∈ ℕ) ↔ (1 < 𝑥 ∧ 𝑥 ≤ 𝐴 ∧ (𝐴 / 𝑥) ∈ ℕ))) |
| 25 | 8, 24 | bitr3d 281 | . . . 4 ⊢ ((𝐴 ∈ ℕ ∧ 𝑥 ∈ ℕ) → ((𝑥 ≠ 1 ∧ (𝐴 / 𝑥) ∈ ℕ) ↔ (1 < 𝑥 ∧ 𝑥 ≤ 𝐴 ∧ (𝐴 / 𝑥) ∈ ℕ))) |
| 26 | 25 | imbi1d 341 | . . 3 ⊢ ((𝐴 ∈ ℕ ∧ 𝑥 ∈ ℕ) → (((𝑥 ≠ 1 ∧ (𝐴 / 𝑥) ∈ ℕ) → 𝑥 = 𝐴) ↔ ((1 < 𝑥 ∧ 𝑥 ≤ 𝐴 ∧ (𝐴 / 𝑥) ∈ ℕ) → 𝑥 = 𝐴))) |
| 27 | 5, 26 | bitrid 283 | . 2 ⊢ ((𝐴 ∈ ℕ ∧ 𝑥 ∈ ℕ) → (((𝐴 / 𝑥) ∈ ℕ → (𝑥 = 1 ∨ 𝑥 = 𝐴)) ↔ ((1 < 𝑥 ∧ 𝑥 ≤ 𝐴 ∧ (𝐴 / 𝑥) ∈ ℕ) → 𝑥 = 𝐴))) |
| 28 | 27 | ralbidva 3159 | 1 ⊢ (𝐴 ∈ ℕ → (∀𝑥 ∈ ℕ ((𝐴 / 𝑥) ∈ ℕ → (𝑥 = 1 ∨ 𝑥 = 𝐴)) ↔ ∀𝑥 ∈ ℕ ((1 < 𝑥 ∧ 𝑥 ≤ 𝐴 ∧ (𝐴 / 𝑥) ∈ ℕ) → 𝑥 = 𝐴))) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∧ wa 395 ∨ wo 848 ∧ w3a 1087 = wceq 1542 ∈ wcel 2114 ≠ wne 2933 ∀wral 3052 class class class wbr 5086 (class class class)co 7360 ℝcr 11028 1c1 11030 < clt 11170 ≤ cle 11171 / cdiv 11798 ℕcn 12165 ℤcz 12515 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5231 ax-nul 5241 ax-pow 5302 ax-pr 5370 ax-un 7682 ax-resscn 11086 ax-1cn 11087 ax-icn 11088 ax-addcl 11089 ax-addrcl 11090 ax-mulcl 11091 ax-mulrcl 11092 ax-mulcom 11093 ax-addass 11094 ax-mulass 11095 ax-distr 11096 ax-i2m1 11097 ax-1ne0 11098 ax-1rid 11099 ax-rnegex 11100 ax-rrecex 11101 ax-cnre 11102 ax-pre-lttri 11103 ax-pre-lttrn 11104 ax-pre-ltadd 11105 ax-pre-mulgt0 11106 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5519 df-eprel 5524 df-po 5532 df-so 5533 df-fr 5577 df-we 5579 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-pred 6259 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-riota 7317 df-ov 7363 df-oprab 7364 df-mpo 7365 df-om 7811 df-2nd 7936 df-frecs 8224 df-wrecs 8255 df-recs 8304 df-rdg 8342 df-er 8636 df-en 8887 df-dom 8888 df-sdom 8889 df-pnf 11172 df-mnf 11173 df-xr 11174 df-ltxr 11175 df-le 11176 df-sub 11370 df-neg 11371 df-div 11799 df-nn 12166 df-n0 12429 df-z 12516 |
| This theorem is referenced by: infpnlem1 16872 |
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