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| Mirrors > Home > MPE Home > Th. List > Mathboxes > zdivgd | Structured version Visualization version GIF version | ||
| Description: Two ways to express "𝑁 is an integer multiple of 𝑀". Originally a subproof of zdiv 12574. (Contributed by SN, 25-Apr-2025.) |
| Ref | Expression |
|---|---|
| zdivgd.1 | ⊢ (𝜑 → 𝑀 ∈ ℂ) |
| zdivgd.2 | ⊢ (𝜑 → 𝑁 ∈ ℂ) |
| zdivgd.3 | ⊢ (𝜑 → 𝑀 ≠ 0) |
| Ref | Expression |
|---|---|
| zdivgd | ⊢ (𝜑 → (∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁 ↔ (𝑁 / 𝑀) ∈ ℤ)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | zcn 12505 | . . . . . . 7 ⊢ (𝑘 ∈ ℤ → 𝑘 ∈ ℂ) | |
| 2 | 1 | adantl 481 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ ℤ) → 𝑘 ∈ ℂ) |
| 3 | zdivgd.1 | . . . . . . 7 ⊢ (𝜑 → 𝑀 ∈ ℂ) | |
| 4 | 3 | adantr 480 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ ℤ) → 𝑀 ∈ ℂ) |
| 5 | zdivgd.3 | . . . . . . 7 ⊢ (𝜑 → 𝑀 ≠ 0) | |
| 6 | 5 | adantr 480 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ ℤ) → 𝑀 ≠ 0) |
| 7 | 2, 4, 6 | divcan3d 11934 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℤ) → ((𝑀 · 𝑘) / 𝑀) = 𝑘) |
| 8 | oveq1 7375 | . . . . 5 ⊢ ((𝑀 · 𝑘) = 𝑁 → ((𝑀 · 𝑘) / 𝑀) = (𝑁 / 𝑀)) | |
| 9 | 7, 8 | sylan9req 2793 | . . . 4 ⊢ (((𝜑 ∧ 𝑘 ∈ ℤ) ∧ (𝑀 · 𝑘) = 𝑁) → 𝑘 = (𝑁 / 𝑀)) |
| 10 | simplr 769 | . . . 4 ⊢ (((𝜑 ∧ 𝑘 ∈ ℤ) ∧ (𝑀 · 𝑘) = 𝑁) → 𝑘 ∈ ℤ) | |
| 11 | 9, 10 | eqeltrrd 2838 | . . 3 ⊢ (((𝜑 ∧ 𝑘 ∈ ℤ) ∧ (𝑀 · 𝑘) = 𝑁) → (𝑁 / 𝑀) ∈ ℤ) |
| 12 | 11 | rexlimdva2 3141 | . 2 ⊢ (𝜑 → (∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁 → (𝑁 / 𝑀) ∈ ℤ)) |
| 13 | zdivgd.2 | . . . 4 ⊢ (𝜑 → 𝑁 ∈ ℂ) | |
| 14 | 13, 3, 5 | divcan2d 11931 | . . 3 ⊢ (𝜑 → (𝑀 · (𝑁 / 𝑀)) = 𝑁) |
| 15 | oveq2 7376 | . . . . . 6 ⊢ (𝑘 = (𝑁 / 𝑀) → (𝑀 · 𝑘) = (𝑀 · (𝑁 / 𝑀))) | |
| 16 | 15 | eqeq1d 2739 | . . . . 5 ⊢ (𝑘 = (𝑁 / 𝑀) → ((𝑀 · 𝑘) = 𝑁 ↔ (𝑀 · (𝑁 / 𝑀)) = 𝑁)) |
| 17 | 16 | rspcev 3578 | . . . 4 ⊢ (((𝑁 / 𝑀) ∈ ℤ ∧ (𝑀 · (𝑁 / 𝑀)) = 𝑁) → ∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁) |
| 18 | 17 | ex 412 | . . 3 ⊢ ((𝑁 / 𝑀) ∈ ℤ → ((𝑀 · (𝑁 / 𝑀)) = 𝑁 → ∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁)) |
| 19 | 14, 18 | syl5com 31 | . 2 ⊢ (𝜑 → ((𝑁 / 𝑀) ∈ ℤ → ∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁)) |
| 20 | 12, 19 | impbid 212 | 1 ⊢ (𝜑 → (∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁 ↔ (𝑁 / 𝑀) ∈ ℤ)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1542 ∈ wcel 2114 ≠ wne 2933 ∃wrex 3062 (class class class)co 7368 ℂcc 11036 0cc0 11038 · cmul 11043 / cdiv 11806 ℤcz 12500 |
| 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 5243 ax-nul 5253 ax-pow 5312 ax-pr 5379 ax-un 7690 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115 |
| 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 3352 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-mpt 5182 df-id 5527 df-po 5540 df-so 5541 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-riota 7325 df-ov 7371 df-oprab 7372 df-mpo 7373 df-er 8645 df-en 8896 df-dom 8897 df-sdom 8898 df-pnf 11180 df-mnf 11181 df-xr 11182 df-ltxr 11183 df-le 11184 df-sub 11378 df-neg 11379 df-div 11807 df-z 12501 |
| This theorem is referenced by: ef11d 42709 |
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