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| Mirrors > Home > ILE Home > Th. List > 0dvds | GIF version | ||
| Description: Only 0 is divisible by 0. Theorem 1.1(h) in [ApostolNT] p. 14. (Contributed by Paul Chapman, 21-Mar-2011.) |
| Ref | Expression |
|---|---|
| 0dvds | ⊢ (𝑁 ∈ ℤ → (0 ∥ 𝑁 ↔ 𝑁 = 0)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0z 9584 | . . . 4 ⊢ 0 ∈ ℤ | |
| 2 | divides 12468 | . . . 4 ⊢ ((0 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (0 ∥ 𝑁 ↔ ∃𝑛 ∈ ℤ (𝑛 · 0) = 𝑁)) | |
| 3 | 1, 2 | mpan 424 | . . 3 ⊢ (𝑁 ∈ ℤ → (0 ∥ 𝑁 ↔ ∃𝑛 ∈ ℤ (𝑛 · 0) = 𝑁)) |
| 4 | zcn 9578 | . . . . . . 7 ⊢ (𝑛 ∈ ℤ → 𝑛 ∈ ℂ) | |
| 5 | 4 | mul01d 8662 | . . . . . 6 ⊢ (𝑛 ∈ ℤ → (𝑛 · 0) = 0) |
| 6 | eqtr2 2251 | . . . . . 6 ⊢ (((𝑛 · 0) = 𝑁 ∧ (𝑛 · 0) = 0) → 𝑁 = 0) | |
| 7 | 5, 6 | sylan2 286 | . . . . 5 ⊢ (((𝑛 · 0) = 𝑁 ∧ 𝑛 ∈ ℤ) → 𝑁 = 0) |
| 8 | 7 | ancoms 268 | . . . 4 ⊢ ((𝑛 ∈ ℤ ∧ (𝑛 · 0) = 𝑁) → 𝑁 = 0) |
| 9 | 8 | rexlimiva 2655 | . . 3 ⊢ (∃𝑛 ∈ ℤ (𝑛 · 0) = 𝑁 → 𝑁 = 0) |
| 10 | 3, 9 | biimtrdi 163 | . 2 ⊢ (𝑁 ∈ ℤ → (0 ∥ 𝑁 → 𝑁 = 0)) |
| 11 | dvds0 12485 | . . . 4 ⊢ (0 ∈ ℤ → 0 ∥ 0) | |
| 12 | 1, 11 | ax-mp 5 | . . 3 ⊢ 0 ∥ 0 |
| 13 | breq2 4112 | . . 3 ⊢ (𝑁 = 0 → (0 ∥ 𝑁 ↔ 0 ∥ 0)) | |
| 14 | 12, 13 | mpbiri 168 | . 2 ⊢ (𝑁 = 0 → 0 ∥ 𝑁) |
| 15 | 10, 14 | impbid1 142 | 1 ⊢ (𝑁 ∈ ℤ → (0 ∥ 𝑁 ↔ 𝑁 = 0)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ↔ wb 105 = wceq 1398 ∈ wcel 2203 ∃wrex 2521 class class class wbr 4108 (class class class)co 6049 0cc0 8123 · cmul 8128 ℤcz 9573 ∥ cdvds 12466 |
| 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-14 2206 ax-ext 2214 ax-sep 4227 ax-pow 4286 ax-pr 4321 ax-setind 4658 ax-resscn 8215 ax-1cn 8216 ax-1re 8217 ax-icn 8218 ax-addcl 8219 ax-addrcl 8220 ax-mulcl 8221 ax-addcom 8223 ax-mulcom 8224 ax-addass 8225 ax-distr 8227 ax-i2m1 8228 ax-0id 8231 ax-rnegex 8232 ax-cnre 8234 |
| This theorem depends on definitions: df-bi 117 df-3or 1006 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ne 2413 df-ral 2525 df-rex 2526 df-reu 2527 df-rab 2529 df-v 2814 df-sbc 3042 df-dif 3212 df-un 3214 df-in 3216 df-ss 3223 df-pw 3670 df-sn 3694 df-pr 3695 df-op 3697 df-uni 3914 df-br 4109 df-opab 4171 df-id 4413 df-xp 4754 df-rel 4755 df-cnv 4756 df-co 4757 df-dm 4758 df-iota 5311 df-fun 5353 df-fv 5359 df-riota 6002 df-ov 6052 df-oprab 6053 df-mpo 6054 df-sub 8442 df-neg 8443 df-z 9574 df-dvds 12467 |
| This theorem is referenced by: zdvdsdc 12491 fsumdvds 12521 dvdsabseq 12526 bezoutlemle 12697 dfgcd3 12699 dfgcd2 12703 dvdssq 12720 rpdvds 12789 pcdvdstr 13018 pc2dvds 13021 znf1o 14786 |
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