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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 12665. (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 12595 | . . . . . . 7 ⊢ (𝑘 ∈ ℤ → 𝑘 ∈ ℂ) | |
| 2 | 1 | adantl 486 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ ℤ) → 𝑘 ∈ ℂ) |
| 3 | zdivgd.1 | . . . . . . 7 ⊢ (𝜑 → 𝑀 ∈ ℂ) | |
| 4 | 3 | adantr 485 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ ℤ) → 𝑀 ∈ ℂ) |
| 5 | zdivgd.3 | . . . . . . 7 ⊢ (𝜑 → 𝑀 ≠ 0) | |
| 6 | 5 | adantr 485 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ ℤ) → 𝑀 ≠ 0) |
| 7 | 2, 4, 6 | divcan3d 11995 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℤ) → ((𝑀 · 𝑘) / 𝑀) = 𝑘) |
| 8 | oveq1 7418 | . . . . 5 ⊢ ((𝑀 · 𝑘) = 𝑁 → ((𝑀 · 𝑘) / 𝑀) = (𝑁 / 𝑀)) | |
| 9 | 7, 8 | sylan9req 2825 | . . . 4 ⊢ (((𝜑 ∧ 𝑘 ∈ ℤ) ∧ (𝑀 · 𝑘) = 𝑁) → 𝑘 = (𝑁 / 𝑀)) |
| 10 | simplr 780 | . . . 4 ⊢ (((𝜑 ∧ 𝑘 ∈ ℤ) ∧ (𝑀 · 𝑘) = 𝑁) → 𝑘 ∈ ℤ) | |
| 11 | 9, 10 | eqeltrrd 2870 | . . 3 ⊢ (((𝜑 ∧ 𝑘 ∈ ℤ) ∧ (𝑀 · 𝑘) = 𝑁) → (𝑁 / 𝑀) ∈ ℤ) |
| 12 | 11 | rexlimdva2 3174 | . 2 ⊢ (𝜑 → (∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁 → (𝑁 / 𝑀) ∈ ℤ)) |
| 13 | zdivgd.2 | . . . 4 ⊢ (𝜑 → 𝑁 ∈ ℂ) | |
| 14 | 13, 3, 5 | divcan2d 11992 | . . 3 ⊢ (𝜑 → (𝑀 · (𝑁 / 𝑀)) = 𝑁) |
| 15 | oveq2 7419 | . . . . . 6 ⊢ (𝑘 = (𝑁 / 𝑀) → (𝑀 · 𝑘) = (𝑀 · (𝑁 / 𝑀))) | |
| 16 | 15 | eqeq1d 2771 | . . . . 5 ⊢ (𝑘 = (𝑁 / 𝑀) → ((𝑀 · 𝑘) = 𝑁 ↔ (𝑀 · (𝑁 / 𝑀)) = 𝑁)) |
| 17 | 16 | rspcev 3590 | . . . 4 ⊢ (((𝑁 / 𝑀) ∈ ℤ ∧ (𝑀 · (𝑁 / 𝑀)) = 𝑁) → ∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁) |
| 18 | 17 | ex 417 | . . 3 ⊢ ((𝑁 / 𝑀) ∈ ℤ → ((𝑀 · (𝑁 / 𝑀)) = 𝑁 → ∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁)) |
| 19 | 14, 18 | syl5com 32 | . 2 ⊢ (𝜑 → ((𝑁 / 𝑀) ∈ ℤ → ∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁)) |
| 20 | 12, 19 | impbid 215 | 1 ⊢ (𝜑 → (∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁 ↔ (𝑁 / 𝑀) ∈ ℤ)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 209 ∧ wa 400 = wceq 1567 ∈ wcel 2149 ≠ wne 2964 ∃wrex 3095 (class class class)co 7411 ℂcc 11097 0cc0 11099 · cmul 11104 / cdiv 11870 ℤcz 12590 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-sep 5261 ax-nul 5271 ax-pow 5337 ax-pr 5405 ax-un 7733 ax-resscn 11156 ax-1cn 11157 ax-icn 11158 ax-addcl 11159 ax-addrcl 11160 ax-mulcl 11161 ax-mulrcl 11162 ax-mulcom 11163 ax-addass 11164 ax-mulass 11165 ax-distr 11166 ax-i2m1 11167 ax-1ne0 11168 ax-1rid 11169 ax-rnegex 11170 ax-rrecex 11171 ax-cnre 11172 ax-pre-lttri 11173 ax-pre-lttrn 11174 ax-pre-ltadd 11175 ax-pre-mulgt0 11176 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-nel 3071 df-ral 3086 df-rex 3096 df-rmo 3376 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-br 5114 df-opab 5178 df-mpt 5197 df-id 5557 df-po 5570 df-so 5571 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7368 df-ov 7414 df-oprab 7415 df-mpo 7416 df-er 8693 df-en 8943 df-dom 8944 df-sdom 8945 df-pnf 11244 df-mnf 11245 df-xr 11246 df-ltxr 11247 df-le 11248 df-sub 11442 df-neg 11443 df-div 11871 df-z 12591 |
| This theorem is referenced by: ef11d 42989 |
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