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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 12406 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 12358 | . . . 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 1078 | . . . . . 6 ⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) ∧ 𝐴 ∥ (𝐶 + 𝐵)) → 𝐶 ∈ ℤ) | |
| 5 | 4 | zcnd 9603 | . . . . 5 ⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) ∧ 𝐴 ∥ (𝐶 + 𝐵)) → 𝐶 ∈ ℂ) |
| 6 | simpl2 1027 | . . . . . 6 ⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) ∧ 𝐴 ∥ (𝐶 + 𝐵)) → 𝐵 ∈ ℝ) | |
| 7 | 6 | recnd 8208 | . . . . 5 ⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) ∧ 𝐴 ∥ (𝐶 + 𝐵)) → 𝐵 ∈ ℂ) |
| 8 | 5, 7 | pncan2d 8492 | . . . 4 ⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) ∧ 𝐴 ∥ (𝐶 + 𝐵)) → ((𝐶 + 𝐵) − 𝐶) = 𝐵) |
| 9 | dvdszrcl 12358 | . . . . . . 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 9607 | . . . 4 ⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) ∧ 𝐴 ∥ (𝐶 + 𝐵)) → ((𝐶 + 𝐵) − 𝐶) ∈ ℤ) |
| 13 | 8, 12 | eqeltrrd 2309 | . . 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 12406 | . . . . . 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 1228 | . . . 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 1219 | . 2 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℝ ∧ (𝐶 ∈ ℤ ∧ 𝐴 ∥ 𝐶)) → (𝐵 ∈ ℤ → (𝐴 ∥ 𝐵 ↔ 𝐴 ∥ (𝐶 + 𝐵)))) |
| 20 | 3, 14, 19 | pm5.21ndd 712 | 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 1004 ∈ wcel 2202 class class class wbr 4088 (class class class)co 6018 ℝcr 8031 + caddc 8035 − cmin 8350 ℤcz 9479 ∥ cdvds 12353 |
| 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 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 ax-un 4530 ax-setind 4635 ax-cnex 8123 ax-resscn 8124 ax-1cn 8125 ax-1re 8126 ax-icn 8127 ax-addcl 8128 ax-addrcl 8129 ax-mulcl 8130 ax-addcom 8132 ax-mulcom 8133 ax-addass 8134 ax-distr 8136 ax-i2m1 8137 ax-0lt1 8138 ax-0id 8140 ax-rnegex 8141 ax-cnre 8143 ax-pre-ltirr 8144 ax-pre-ltwlin 8145 ax-pre-lttrn 8146 ax-pre-ltadd 8148 |
| This theorem depends on definitions: df-bi 117 df-3or 1005 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ne 2403 df-nel 2498 df-ral 2515 df-rex 2516 df-reu 2517 df-rab 2519 df-v 2804 df-sbc 3032 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-int 3929 df-br 4089 df-opab 4151 df-id 4390 df-xp 4731 df-rel 4732 df-cnv 4733 df-co 4734 df-dm 4735 df-iota 5286 df-fun 5328 df-fv 5334 df-riota 5971 df-ov 6021 df-oprab 6022 df-mpo 6023 df-pnf 8216 df-mnf 8217 df-xr 8218 df-ltxr 8219 df-le 8220 df-sub 8352 df-neg 8353 df-inn 9144 df-n0 9403 df-z 9480 df-dvds 12354 |
| This theorem is referenced by: 2lgsoddprmlem2 15841 |
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