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| Mirrors > Home > ILE Home > Th. List > dvdsaddre2b | GIF version | ||
| Description: Adding a multiple of the base does not affect divisibility. Variant of dvdsadd2b 12022 only requiring 𝐵 to be a real number (not necessarily an integer). (Contributed by AV, 19-Jul-2021.) |
| Ref | Expression |
|---|---|
| dvdsaddre2b | ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) → (𝐴 ∥ 𝐵 ↔ 𝐴 ∥ (𝐶 + 𝐵))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dvdszrcl 11974 | . . . 4 ⊢ (𝐴 ∥ 𝐵 → (𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ)) | |
| 2 | 1 | simprd 114 | . . 3 ⊢ (𝐴 ∥ 𝐵 → 𝐵 ∈ ℤ) |
| 3 | 2 | a1i 9 | . 2 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) → (𝐴 ∥ 𝐵 → 𝐵 ∈ ℤ)) |
| 4 | simpl3l 1054 | . . . . . 6 ⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) ∧ 𝐴 ∥ (𝐶 + 𝐵)) → 𝐶 ∈ ℤ) | |
| 5 | 4 | zcnd 9466 | . . . . 5 ⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) ∧ 𝐴 ∥ (𝐶 + 𝐵)) → 𝐶 ∈ ℂ) |
| 6 | simpl2 1003 | . . . . . 6 ⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) ∧ 𝐴 ∥ (𝐶 + 𝐵)) → 𝐵 ∈ ℝ) | |
| 7 | 6 | recnd 8072 | . . . . 5 ⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) ∧ 𝐴 ∥ (𝐶 + 𝐵)) → 𝐵 ∈ ℂ) |
| 8 | 5, 7 | pncan2d 8356 | . . . 4 ⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) ∧ 𝐴 ∥ (𝐶 + 𝐵)) → ((𝐶 + 𝐵) − 𝐶) = 𝐵) |
| 9 | dvdszrcl 11974 | . . . . . . 7 ⊢ (𝐴 ∥ (𝐶 + 𝐵) → (𝐴 ∈ ℤ ∧ (𝐶 + 𝐵) ∈ ℤ)) | |
| 10 | 9 | simprd 114 | . . . . . 6 ⊢ (𝐴 ∥ (𝐶 + 𝐵) → (𝐶 + 𝐵) ∈ ℤ) |
| 11 | 10 | adantl 277 | . . . . 5 ⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) ∧ 𝐴 ∥ (𝐶 + 𝐵)) → (𝐶 + 𝐵) ∈ ℤ) |
| 12 | 11, 4 | zsubcld 9470 | . . . 4 ⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) ∧ 𝐴 ∥ (𝐶 + 𝐵)) → ((𝐶 + 𝐵) − 𝐶) ∈ ℤ) |
| 13 | 8, 12 | eqeltrrd 2274 | . . 3 ⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) ∧ 𝐴 ∥ (𝐶 + 𝐵)) → 𝐵 ∈ ℤ) |
| 14 | 13 | ex 115 | . 2 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) → (𝐴 ∥ (𝐶 + 𝐵) → 𝐵 ∈ ℤ)) |
| 15 | dvdsadd2b 12022 | . . . . . 6 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) → (𝐴 ∥ 𝐵 ↔ 𝐴 ∥ (𝐶 + 𝐵))) | |
| 16 | 15 | a1d 22 | . . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) → (𝐵 ∈ ℝ → (𝐴 ∥ 𝐵 ↔ 𝐴 ∥ (𝐶 + 𝐵)))) |
| 17 | 16 | 3exp 1204 | . . . 4 ⊢ (𝐴 ∈ ℤ → (𝐵 ∈ ℤ → ((𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶) → (𝐵 ∈ ℝ → (𝐴 ∥ 𝐵 ↔ 𝐴 ∥ (𝐶 + 𝐵)))))) |
| 18 | 17 | com24 87 | . . 3 ⊢ (𝐴 ∈ ℤ → (𝐵 ∈ ℝ → ((𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶) → (𝐵 ∈ ℤ → (𝐴 ∥ 𝐵 ↔ 𝐴 ∥ (𝐶 + 𝐵)))))) |
| 19 | 18 | 3imp 1195 | . 2 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) → (𝐵 ∈ ℤ → (𝐴 ∥ 𝐵 ↔ 𝐴 ∥ (𝐶 + 𝐵)))) |
| 20 | 3, 14, 19 | pm5.21ndd 706 | 1 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) → (𝐴 ∥ 𝐵 ↔ 𝐴 ∥ (𝐶 + 𝐵))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 ∧ w3a 980 ∈ wcel 2167 class class class wbr 4034 (class class class)co 5925 ℝcr 7895 + caddc 7899 − cmin 8214 ℤcz 9343 ∥ cdvds 11969 |
| 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 615 ax-in2 616 ax-io 710 ax-5 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-13 2169 ax-14 2170 ax-ext 2178 ax-sep 4152 ax-pow 4208 ax-pr 4243 ax-un 4469 ax-setind 4574 ax-cnex 7987 ax-resscn 7988 ax-1cn 7989 ax-1re 7990 ax-icn 7991 ax-addcl 7992 ax-addrcl 7993 ax-mulcl 7994 ax-addcom 7996 ax-mulcom 7997 ax-addass 7998 ax-distr 8000 ax-i2m1 8001 ax-0lt1 8002 ax-0id 8004 ax-rnegex 8005 ax-cnre 8007 ax-pre-ltirr 8008 ax-pre-ltwlin 8009 ax-pre-lttrn 8010 ax-pre-ltadd 8012 |
| This theorem depends on definitions: df-bi 117 df-3or 981 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1475 df-sb 1777 df-eu 2048 df-mo 2049 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ne 2368 df-nel 2463 df-ral 2480 df-rex 2481 df-reu 2482 df-rab 2484 df-v 2765 df-sbc 2990 df-dif 3159 df-un 3161 df-in 3163 df-ss 3170 df-pw 3608 df-sn 3629 df-pr 3630 df-op 3632 df-uni 3841 df-int 3876 df-br 4035 df-opab 4096 df-id 4329 df-xp 4670 df-rel 4671 df-cnv 4672 df-co 4673 df-dm 4674 df-iota 5220 df-fun 5261 df-fv 5267 df-riota 5880 df-ov 5928 df-oprab 5929 df-mpo 5930 df-pnf 8080 df-mnf 8081 df-xr 8082 df-ltxr 8083 df-le 8084 df-sub 8216 df-neg 8217 df-inn 9008 df-n0 9267 df-z 9344 df-dvds 11970 |
| This theorem is referenced by: 2lgsoddprmlem2 15431 |
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