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Mirrors > Home > ILE Home > Th. List > zdivmul | GIF version |
Description: Property of divisibility: if 𝐷 divides 𝐴 then it divides 𝐵 · 𝐴. (Contributed by NM, 3-Oct-2008.) |
Ref | Expression |
---|---|
zdivmul | ⊢ (((𝐷 ∈ ℕ ∧ 𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) ∧ (𝐴 / 𝐷) ∈ ℤ) → ((𝐵 · 𝐴) / 𝐷) ∈ ℤ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | zcn 9253 | . . . . . 6 ⊢ (𝐵 ∈ ℤ → 𝐵 ∈ ℂ) | |
2 | 1 | 3ad2ant2 1019 | . . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝐷 ∈ ℕ) → 𝐵 ∈ ℂ) |
3 | zcn 9253 | . . . . . 6 ⊢ (𝐴 ∈ ℤ → 𝐴 ∈ ℂ) | |
4 | 3 | 3ad2ant1 1018 | . . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝐷 ∈ ℕ) → 𝐴 ∈ ℂ) |
5 | nncn 8922 | . . . . . . 7 ⊢ (𝐷 ∈ ℕ → 𝐷 ∈ ℂ) | |
6 | nnap0 8943 | . . . . . . 7 ⊢ (𝐷 ∈ ℕ → 𝐷 # 0) | |
7 | 5, 6 | jca 306 | . . . . . 6 ⊢ (𝐷 ∈ ℕ → (𝐷 ∈ ℂ ∧ 𝐷 # 0)) |
8 | 7 | 3ad2ant3 1020 | . . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝐷 ∈ ℕ) → (𝐷 ∈ ℂ ∧ 𝐷 # 0)) |
9 | divassap 8642 | . . . . 5 ⊢ ((𝐵 ∈ ℂ ∧ 𝐴 ∈ ℂ ∧ (𝐷 ∈ ℂ ∧ 𝐷 # 0)) → ((𝐵 · 𝐴) / 𝐷) = (𝐵 · (𝐴 / 𝐷))) | |
10 | 2, 4, 8, 9 | syl3anc 1238 | . . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝐷 ∈ ℕ) → ((𝐵 · 𝐴) / 𝐷) = (𝐵 · (𝐴 / 𝐷))) |
11 | 10 | 3comr 1211 | . . 3 ⊢ ((𝐷 ∈ ℕ ∧ 𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → ((𝐵 · 𝐴) / 𝐷) = (𝐵 · (𝐴 / 𝐷))) |
12 | 11 | adantr 276 | . 2 ⊢ (((𝐷 ∈ ℕ ∧ 𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) ∧ (𝐴 / 𝐷) ∈ ℤ) → ((𝐵 · 𝐴) / 𝐷) = (𝐵 · (𝐴 / 𝐷))) |
13 | zmulcl 9301 | . . 3 ⊢ ((𝐵 ∈ ℤ ∧ (𝐴 / 𝐷) ∈ ℤ) → (𝐵 · (𝐴 / 𝐷)) ∈ ℤ) | |
14 | 13 | 3ad2antl3 1161 | . 2 ⊢ (((𝐷 ∈ ℕ ∧ 𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) ∧ (𝐴 / 𝐷) ∈ ℤ) → (𝐵 · (𝐴 / 𝐷)) ∈ ℤ) |
15 | 12, 14 | eqeltrd 2254 | 1 ⊢ (((𝐷 ∈ ℕ ∧ 𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) ∧ (𝐴 / 𝐷) ∈ ℤ) → ((𝐵 · 𝐴) / 𝐷) ∈ ℤ) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 104 ∧ w3a 978 = wceq 1353 ∈ wcel 2148 class class class wbr 4002 (class class class)co 5871 ℂcc 7805 0cc0 7807 · cmul 7812 # cap 8533 / cdiv 8624 ℕcn 8914 ℤcz 9248 |
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 614 ax-in2 615 ax-io 709 ax-5 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-10 1505 ax-11 1506 ax-i12 1507 ax-bndl 1509 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-i5r 1535 ax-13 2150 ax-14 2151 ax-ext 2159 ax-sep 4120 ax-pow 4173 ax-pr 4208 ax-un 4432 ax-setind 4535 ax-cnex 7898 ax-resscn 7899 ax-1cn 7900 ax-1re 7901 ax-icn 7902 ax-addcl 7903 ax-addrcl 7904 ax-mulcl 7905 ax-mulrcl 7906 ax-addcom 7907 ax-mulcom 7908 ax-addass 7909 ax-mulass 7910 ax-distr 7911 ax-i2m1 7912 ax-0lt1 7913 ax-1rid 7914 ax-0id 7915 ax-rnegex 7916 ax-precex 7917 ax-cnre 7918 ax-pre-ltirr 7919 ax-pre-ltwlin 7920 ax-pre-lttrn 7921 ax-pre-apti 7922 ax-pre-ltadd 7923 ax-pre-mulgt0 7924 ax-pre-mulext 7925 |
This theorem depends on definitions: df-bi 117 df-3or 979 df-3an 980 df-tru 1356 df-fal 1359 df-nf 1461 df-sb 1763 df-eu 2029 df-mo 2030 df-clab 2164 df-cleq 2170 df-clel 2173 df-nfc 2308 df-ne 2348 df-nel 2443 df-ral 2460 df-rex 2461 df-reu 2462 df-rmo 2463 df-rab 2464 df-v 2739 df-sbc 2963 df-dif 3131 df-un 3133 df-in 3135 df-ss 3142 df-pw 3577 df-sn 3598 df-pr 3599 df-op 3601 df-uni 3810 df-int 3845 df-br 4003 df-opab 4064 df-id 4292 df-po 4295 df-iso 4296 df-xp 4631 df-rel 4632 df-cnv 4633 df-co 4634 df-dm 4635 df-iota 5176 df-fun 5216 df-fv 5222 df-riota 5827 df-ov 5874 df-oprab 5875 df-mpo 5876 df-pnf 7989 df-mnf 7990 df-xr 7991 df-ltxr 7992 df-le 7993 df-sub 8125 df-neg 8126 df-reap 8527 df-ap 8534 df-div 8625 df-inn 8915 df-n0 9172 df-z 9249 |
This theorem is referenced by: (None) |
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