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Mirrors > Home > ILE Home > Th. List > modqabs | GIF version |
Description: Absorption law for modulo. (Contributed by Jim Kingdon, 21-Oct-2021.) |
Ref | Expression |
---|---|
modqabs.a | ⊢ (𝜑 → 𝐴 ∈ ℚ) |
modqabs.b | ⊢ (𝜑 → 𝐵 ∈ ℚ) |
modqabs.bgt0 | ⊢ (𝜑 → 0 < 𝐵) |
modqabs.c | ⊢ (𝜑 → 𝐶 ∈ ℚ) |
modqabs.bc | ⊢ (𝜑 → 𝐵 ≤ 𝐶) |
Ref | Expression |
---|---|
modqabs | ⊢ (𝜑 → ((𝐴 mod 𝐵) mod 𝐶) = (𝐴 mod 𝐵)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | modqabs.a | . . 3 ⊢ (𝜑 → 𝐴 ∈ ℚ) | |
2 | modqabs.b | . . 3 ⊢ (𝜑 → 𝐵 ∈ ℚ) | |
3 | modqabs.bgt0 | . . 3 ⊢ (𝜑 → 0 < 𝐵) | |
4 | 1, 2, 3 | modqcld 10322 | . 2 ⊢ (𝜑 → (𝐴 mod 𝐵) ∈ ℚ) |
5 | modqabs.c | . 2 ⊢ (𝜑 → 𝐶 ∈ ℚ) | |
6 | modqge0 10326 | . . 3 ⊢ ((𝐴 ∈ ℚ ∧ 𝐵 ∈ ℚ ∧ 0 < 𝐵) → 0 ≤ (𝐴 mod 𝐵)) | |
7 | 1, 2, 3, 6 | syl3anc 1238 | . 2 ⊢ (𝜑 → 0 ≤ (𝐴 mod 𝐵)) |
8 | qre 9620 | . . . 4 ⊢ ((𝐴 mod 𝐵) ∈ ℚ → (𝐴 mod 𝐵) ∈ ℝ) | |
9 | 4, 8 | syl 14 | . . 3 ⊢ (𝜑 → (𝐴 mod 𝐵) ∈ ℝ) |
10 | qre 9620 | . . . 4 ⊢ (𝐵 ∈ ℚ → 𝐵 ∈ ℝ) | |
11 | 2, 10 | syl 14 | . . 3 ⊢ (𝜑 → 𝐵 ∈ ℝ) |
12 | qre 9620 | . . . 4 ⊢ (𝐶 ∈ ℚ → 𝐶 ∈ ℝ) | |
13 | 5, 12 | syl 14 | . . 3 ⊢ (𝜑 → 𝐶 ∈ ℝ) |
14 | modqlt 10327 | . . . 4 ⊢ ((𝐴 ∈ ℚ ∧ 𝐵 ∈ ℚ ∧ 0 < 𝐵) → (𝐴 mod 𝐵) < 𝐵) | |
15 | 1, 2, 3, 14 | syl3anc 1238 | . . 3 ⊢ (𝜑 → (𝐴 mod 𝐵) < 𝐵) |
16 | modqabs.bc | . . 3 ⊢ (𝜑 → 𝐵 ≤ 𝐶) | |
17 | 9, 11, 13, 15, 16 | ltletrd 8375 | . 2 ⊢ (𝜑 → (𝐴 mod 𝐵) < 𝐶) |
18 | modqid 10343 | . 2 ⊢ ((((𝐴 mod 𝐵) ∈ ℚ ∧ 𝐶 ∈ ℚ) ∧ (0 ≤ (𝐴 mod 𝐵) ∧ (𝐴 mod 𝐵) < 𝐶)) → ((𝐴 mod 𝐵) mod 𝐶) = (𝐴 mod 𝐵)) | |
19 | 4, 5, 7, 17, 18 | syl22anc 1239 | 1 ⊢ (𝜑 → ((𝐴 mod 𝐵) mod 𝐶) = (𝐴 mod 𝐵)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 = wceq 1353 ∈ wcel 2148 class class class wbr 4002 (class class class)co 5871 ℝcr 7806 0cc0 7807 < clt 7987 ≤ cle 7988 ℚcq 9614 mod cmo 10316 |
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 ax-arch 7926 |
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-csb 3058 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-iun 3888 df-br 4003 df-opab 4064 df-mpt 4065 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-rn 4636 df-res 4637 df-ima 4638 df-iota 5176 df-fun 5216 df-fn 5217 df-f 5218 df-fv 5222 df-riota 5827 df-ov 5874 df-oprab 5875 df-mpo 5876 df-1st 6137 df-2nd 6138 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 df-q 9615 df-rp 9649 df-fl 10264 df-mod 10317 |
This theorem is referenced by: modqabs2 10352 |
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