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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 12562. (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 12493 | . . . . . . 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 11922 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℤ) → ((𝑀 · 𝑘) / 𝑀) = 𝑘) |
| 8 | oveq1 7365 | . . . . 5 ⊢ ((𝑀 · 𝑘) = 𝑁 → ((𝑀 · 𝑘) / 𝑀) = (𝑁 / 𝑀)) | |
| 9 | 7, 8 | sylan9req 2792 | . . . 4 ⊢ (((𝜑 ∧ 𝑘 ∈ ℤ) ∧ (𝑀 · 𝑘) = 𝑁) → 𝑘 = (𝑁 / 𝑀)) |
| 10 | simplr 768 | . . . 4 ⊢ (((𝜑 ∧ 𝑘 ∈ ℤ) ∧ (𝑀 · 𝑘) = 𝑁) → 𝑘 ∈ ℤ) | |
| 11 | 9, 10 | eqeltrrd 2837 | . . 3 ⊢ (((𝜑 ∧ 𝑘 ∈ ℤ) ∧ (𝑀 · 𝑘) = 𝑁) → (𝑁 / 𝑀) ∈ ℤ) |
| 12 | 11 | rexlimdva2 3139 | . 2 ⊢ (𝜑 → (∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁 → (𝑁 / 𝑀) ∈ ℤ)) |
| 13 | zdivgd.2 | . . . 4 ⊢ (𝜑 → 𝑁 ∈ ℂ) | |
| 14 | 13, 3, 5 | divcan2d 11919 | . . 3 ⊢ (𝜑 → (𝑀 · (𝑁 / 𝑀)) = 𝑁) |
| 15 | oveq2 7366 | . . . . . 6 ⊢ (𝑘 = (𝑁 / 𝑀) → (𝑀 · 𝑘) = (𝑀 · (𝑁 / 𝑀))) | |
| 16 | 15 | eqeq1d 2738 | . . . . 5 ⊢ (𝑘 = (𝑁 / 𝑀) → ((𝑀 · 𝑘) = 𝑁 ↔ (𝑀 · (𝑁 / 𝑀)) = 𝑁)) |
| 17 | 16 | rspcev 3576 | . . . 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 1541 ∈ wcel 2113 ≠ wne 2932 ∃wrex 3060 (class class class)co 7358 ℂcc 11024 0cc0 11026 · cmul 11031 / cdiv 11794 ℤcz 12488 |
| 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 2184 ax-ext 2708 ax-sep 5241 ax-nul 5251 ax-pow 5310 ax-pr 5377 ax-un 7680 ax-resscn 11083 ax-1cn 11084 ax-icn 11085 ax-addcl 11086 ax-addrcl 11087 ax-mulcl 11088 ax-mulrcl 11089 ax-mulcom 11090 ax-addass 11091 ax-mulass 11092 ax-distr 11093 ax-i2m1 11094 ax-1ne0 11095 ax-1rid 11096 ax-rnegex 11097 ax-rrecex 11098 ax-cnre 11099 ax-pre-lttri 11100 ax-pre-lttrn 11101 ax-pre-ltadd 11102 ax-pre-mulgt0 11103 |
| 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 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3061 df-rmo 3350 df-reu 3351 df-rab 3400 df-v 3442 df-sbc 3741 df-csb 3850 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-br 5099 df-opab 5161 df-mpt 5180 df-id 5519 df-po 5532 df-so 5533 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-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 7315 df-ov 7361 df-oprab 7362 df-mpo 7363 df-er 8635 df-en 8884 df-dom 8885 df-sdom 8886 df-pnf 11168 df-mnf 11169 df-xr 11170 df-ltxr 11171 df-le 11172 df-sub 11366 df-neg 11367 df-div 11795 df-z 12489 |
| This theorem is referenced by: ef11d 42594 |
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