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Mirrors > Home > ILE Home > Th. List > negqmod0 | GIF version |
Description: 𝐴 is divisible by 𝐵 iff its negative is. (Contributed by Jim Kingdon, 18-Oct-2021.) |
Ref | Expression |
---|---|
negqmod0 | ⊢ ((𝐴 ∈ ℚ ∧ 𝐵 ∈ ℚ ∧ 0 < 𝐵) → ((𝐴 mod 𝐵) = 0 ↔ (-𝐴 mod 𝐵) = 0)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | qcn 9543 | . . . . . 6 ⊢ (𝐴 ∈ ℚ → 𝐴 ∈ ℂ) | |
2 | 1 | 3ad2ant1 1003 | . . . . 5 ⊢ ((𝐴 ∈ ℚ ∧ 𝐵 ∈ ℚ ∧ 0 < 𝐵) → 𝐴 ∈ ℂ) |
3 | qcn 9543 | . . . . . 6 ⊢ (𝐵 ∈ ℚ → 𝐵 ∈ ℂ) | |
4 | 3 | 3ad2ant2 1004 | . . . . 5 ⊢ ((𝐴 ∈ ℚ ∧ 𝐵 ∈ ℚ ∧ 0 < 𝐵) → 𝐵 ∈ ℂ) |
5 | qre 9534 | . . . . . . 7 ⊢ (𝐵 ∈ ℚ → 𝐵 ∈ ℝ) | |
6 | 5 | 3ad2ant2 1004 | . . . . . 6 ⊢ ((𝐴 ∈ ℚ ∧ 𝐵 ∈ ℚ ∧ 0 < 𝐵) → 𝐵 ∈ ℝ) |
7 | simp3 984 | . . . . . 6 ⊢ ((𝐴 ∈ ℚ ∧ 𝐵 ∈ ℚ ∧ 0 < 𝐵) → 0 < 𝐵) | |
8 | 6, 7 | gt0ap0d 8504 | . . . . 5 ⊢ ((𝐴 ∈ ℚ ∧ 𝐵 ∈ ℚ ∧ 0 < 𝐵) → 𝐵 # 0) |
9 | 2, 4, 8 | divclapd 8663 | . . . 4 ⊢ ((𝐴 ∈ ℚ ∧ 𝐵 ∈ ℚ ∧ 0 < 𝐵) → (𝐴 / 𝐵) ∈ ℂ) |
10 | znegclb 9200 | . . . 4 ⊢ ((𝐴 / 𝐵) ∈ ℂ → ((𝐴 / 𝐵) ∈ ℤ ↔ -(𝐴 / 𝐵) ∈ ℤ)) | |
11 | 9, 10 | syl 14 | . . 3 ⊢ ((𝐴 ∈ ℚ ∧ 𝐵 ∈ ℚ ∧ 0 < 𝐵) → ((𝐴 / 𝐵) ∈ ℤ ↔ -(𝐴 / 𝐵) ∈ ℤ)) |
12 | 2, 4, 8 | divnegapd 8676 | . . . 4 ⊢ ((𝐴 ∈ ℚ ∧ 𝐵 ∈ ℚ ∧ 0 < 𝐵) → -(𝐴 / 𝐵) = (-𝐴 / 𝐵)) |
13 | 12 | eleq1d 2226 | . . 3 ⊢ ((𝐴 ∈ ℚ ∧ 𝐵 ∈ ℚ ∧ 0 < 𝐵) → (-(𝐴 / 𝐵) ∈ ℤ ↔ (-𝐴 / 𝐵) ∈ ℤ)) |
14 | 11, 13 | bitrd 187 | . 2 ⊢ ((𝐴 ∈ ℚ ∧ 𝐵 ∈ ℚ ∧ 0 < 𝐵) → ((𝐴 / 𝐵) ∈ ℤ ↔ (-𝐴 / 𝐵) ∈ ℤ)) |
15 | modq0 10228 | . 2 ⊢ ((𝐴 ∈ ℚ ∧ 𝐵 ∈ ℚ ∧ 0 < 𝐵) → ((𝐴 mod 𝐵) = 0 ↔ (𝐴 / 𝐵) ∈ ℤ)) | |
16 | qnegcl 9545 | . . 3 ⊢ (𝐴 ∈ ℚ → -𝐴 ∈ ℚ) | |
17 | modq0 10228 | . . 3 ⊢ ((-𝐴 ∈ ℚ ∧ 𝐵 ∈ ℚ ∧ 0 < 𝐵) → ((-𝐴 mod 𝐵) = 0 ↔ (-𝐴 / 𝐵) ∈ ℤ)) | |
18 | 16, 17 | syl3an1 1253 | . 2 ⊢ ((𝐴 ∈ ℚ ∧ 𝐵 ∈ ℚ ∧ 0 < 𝐵) → ((-𝐴 mod 𝐵) = 0 ↔ (-𝐴 / 𝐵) ∈ ℤ)) |
19 | 14, 15, 18 | 3bitr4d 219 | 1 ⊢ ((𝐴 ∈ ℚ ∧ 𝐵 ∈ ℚ ∧ 0 < 𝐵) → ((𝐴 mod 𝐵) = 0 ↔ (-𝐴 mod 𝐵) = 0)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ↔ wb 104 ∧ w3a 963 = wceq 1335 ∈ wcel 2128 class class class wbr 3965 (class class class)co 5824 ℂcc 7730 ℝcr 7731 0cc0 7732 < clt 7912 -cneg 8047 / cdiv 8545 ℤcz 9167 ℚcq 9528 mod cmo 10221 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1427 ax-7 1428 ax-gen 1429 ax-ie1 1473 ax-ie2 1474 ax-8 1484 ax-10 1485 ax-11 1486 ax-i12 1487 ax-bndl 1489 ax-4 1490 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-13 2130 ax-14 2131 ax-ext 2139 ax-sep 4082 ax-pow 4135 ax-pr 4169 ax-un 4393 ax-setind 4496 ax-cnex 7823 ax-resscn 7824 ax-1cn 7825 ax-1re 7826 ax-icn 7827 ax-addcl 7828 ax-addrcl 7829 ax-mulcl 7830 ax-mulrcl 7831 ax-addcom 7832 ax-mulcom 7833 ax-addass 7834 ax-mulass 7835 ax-distr 7836 ax-i2m1 7837 ax-0lt1 7838 ax-1rid 7839 ax-0id 7840 ax-rnegex 7841 ax-precex 7842 ax-cnre 7843 ax-pre-ltirr 7844 ax-pre-ltwlin 7845 ax-pre-lttrn 7846 ax-pre-apti 7847 ax-pre-ltadd 7848 ax-pre-mulgt0 7849 ax-pre-mulext 7850 ax-arch 7851 |
This theorem depends on definitions: df-bi 116 df-3or 964 df-3an 965 df-tru 1338 df-fal 1341 df-nf 1441 df-sb 1743 df-eu 2009 df-mo 2010 df-clab 2144 df-cleq 2150 df-clel 2153 df-nfc 2288 df-ne 2328 df-nel 2423 df-ral 2440 df-rex 2441 df-reu 2442 df-rmo 2443 df-rab 2444 df-v 2714 df-sbc 2938 df-csb 3032 df-dif 3104 df-un 3106 df-in 3108 df-ss 3115 df-pw 3545 df-sn 3566 df-pr 3567 df-op 3569 df-uni 3773 df-int 3808 df-iun 3851 df-br 3966 df-opab 4026 df-mpt 4027 df-id 4253 df-po 4256 df-iso 4257 df-xp 4592 df-rel 4593 df-cnv 4594 df-co 4595 df-dm 4596 df-rn 4597 df-res 4598 df-ima 4599 df-iota 5135 df-fun 5172 df-fn 5173 df-f 5174 df-fv 5178 df-riota 5780 df-ov 5827 df-oprab 5828 df-mpo 5829 df-1st 6088 df-2nd 6089 df-pnf 7914 df-mnf 7915 df-xr 7916 df-ltxr 7917 df-le 7918 df-sub 8048 df-neg 8049 df-reap 8450 df-ap 8457 df-div 8546 df-inn 8834 df-n0 9091 df-z 9168 df-q 9529 df-rp 9561 df-fl 10169 df-mod 10222 |
This theorem is referenced by: (None) |
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