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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 12201 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 12153 | . . . 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 1055 | . . . . . 6 ⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) ∧ 𝐴 ∥ (𝐶 + 𝐵)) → 𝐶 ∈ ℤ) | |
| 5 | 4 | zcnd 9509 | . . . . 5 ⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) ∧ 𝐴 ∥ (𝐶 + 𝐵)) → 𝐶 ∈ ℂ) |
| 6 | simpl2 1004 | . . . . . 6 ⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) ∧ 𝐴 ∥ (𝐶 + 𝐵)) → 𝐵 ∈ ℝ) | |
| 7 | 6 | recnd 8114 | . . . . 5 ⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) ∧ 𝐴 ∥ (𝐶 + 𝐵)) → 𝐵 ∈ ℂ) |
| 8 | 5, 7 | pncan2d 8398 | . . . 4 ⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) ∧ 𝐴 ∥ (𝐶 + 𝐵)) → ((𝐶 + 𝐵) − 𝐶) = 𝐵) |
| 9 | dvdszrcl 12153 | . . . . . . 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 9513 | . . . 4 ⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) ∧ 𝐴 ∥ (𝐶 + 𝐵)) → ((𝐶 + 𝐵) − 𝐶) ∈ ℤ) |
| 13 | 8, 12 | eqeltrrd 2284 | . . 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 12201 | . . . . . 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 1205 | . . . 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 1196 | . 2 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) → (𝐵 ∈ ℤ → (𝐴 ∥ 𝐵 ↔ 𝐴 ∥ (𝐶 + 𝐵)))) |
| 20 | 3, 14, 19 | pm5.21ndd 707 | 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 981 ∈ wcel 2177 class class class wbr 4048 (class class class)co 5954 ℝcr 7937 + caddc 7941 − cmin 8256 ℤcz 9385 ∥ cdvds 12148 |
| 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 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-13 2179 ax-14 2180 ax-ext 2188 ax-sep 4167 ax-pow 4223 ax-pr 4258 ax-un 4485 ax-setind 4590 ax-cnex 8029 ax-resscn 8030 ax-1cn 8031 ax-1re 8032 ax-icn 8033 ax-addcl 8034 ax-addrcl 8035 ax-mulcl 8036 ax-addcom 8038 ax-mulcom 8039 ax-addass 8040 ax-distr 8042 ax-i2m1 8043 ax-0lt1 8044 ax-0id 8046 ax-rnegex 8047 ax-cnre 8049 ax-pre-ltirr 8050 ax-pre-ltwlin 8051 ax-pre-lttrn 8052 ax-pre-ltadd 8054 |
| This theorem depends on definitions: df-bi 117 df-3or 982 df-3an 983 df-tru 1376 df-fal 1379 df-nf 1485 df-sb 1787 df-eu 2058 df-mo 2059 df-clab 2193 df-cleq 2199 df-clel 2202 df-nfc 2338 df-ne 2378 df-nel 2473 df-ral 2490 df-rex 2491 df-reu 2492 df-rab 2494 df-v 2775 df-sbc 3001 df-dif 3170 df-un 3172 df-in 3174 df-ss 3181 df-pw 3620 df-sn 3641 df-pr 3642 df-op 3644 df-uni 3854 df-int 3889 df-br 4049 df-opab 4111 df-id 4345 df-xp 4686 df-rel 4687 df-cnv 4688 df-co 4689 df-dm 4690 df-iota 5238 df-fun 5279 df-fv 5285 df-riota 5909 df-ov 5957 df-oprab 5958 df-mpo 5959 df-pnf 8122 df-mnf 8123 df-xr 8124 df-ltxr 8125 df-le 8126 df-sub 8258 df-neg 8259 df-inn 9050 df-n0 9309 df-z 9386 df-dvds 12149 |
| This theorem is referenced by: 2lgsoddprmlem2 15633 |
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