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Mirrors > Home > ILE Home > Th. List > lgsneg1 | GIF version |
Description: The Legendre symbol for nonnegative first parameter is unchanged by negation of the second. (Contributed by Mario Carneiro, 4-Feb-2015.) |
Ref | Expression |
---|---|
lgsneg1 | ⊢ ((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ) → (𝐴 /L -𝑁) = (𝐴 /L 𝑁)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | neg0 8165 | . . . 4 ⊢ -0 = 0 | |
2 | simpr 109 | . . . . 5 ⊢ (((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ) ∧ 𝑁 = 0) → 𝑁 = 0) | |
3 | 2 | negeqd 8114 | . . . 4 ⊢ (((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ) ∧ 𝑁 = 0) → -𝑁 = -0) |
4 | 1, 3, 2 | 3eqtr4a 2229 | . . 3 ⊢ (((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ) ∧ 𝑁 = 0) → -𝑁 = 𝑁) |
5 | 4 | oveq2d 5869 | . 2 ⊢ (((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ) ∧ 𝑁 = 0) → (𝐴 /L -𝑁) = (𝐴 /L 𝑁)) |
6 | nn0z 9232 | . . . . 5 ⊢ (𝐴 ∈ ℕ0 → 𝐴 ∈ ℤ) | |
7 | lgsneg 13719 | . . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝑁 ≠ 0) → (𝐴 /L -𝑁) = (if(𝐴 < 0, -1, 1) · (𝐴 /L 𝑁))) | |
8 | 6, 7 | syl3an1 1266 | . . . 4 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ ∧ 𝑁 ≠ 0) → (𝐴 /L -𝑁) = (if(𝐴 < 0, -1, 1) · (𝐴 /L 𝑁))) |
9 | nn0nlt0 9161 | . . . . . . 7 ⊢ (𝐴 ∈ ℕ0 → ¬ 𝐴 < 0) | |
10 | 9 | 3ad2ant1 1013 | . . . . . 6 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ ∧ 𝑁 ≠ 0) → ¬ 𝐴 < 0) |
11 | 10 | iffalsed 3536 | . . . . 5 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ ∧ 𝑁 ≠ 0) → if(𝐴 < 0, -1, 1) = 1) |
12 | 11 | oveq1d 5868 | . . . 4 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ ∧ 𝑁 ≠ 0) → (if(𝐴 < 0, -1, 1) · (𝐴 /L 𝑁)) = (1 · (𝐴 /L 𝑁))) |
13 | 6 | 3ad2ant1 1013 | . . . . . . 7 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ ∧ 𝑁 ≠ 0) → 𝐴 ∈ ℤ) |
14 | simp2 993 | . . . . . . 7 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ ∧ 𝑁 ≠ 0) → 𝑁 ∈ ℤ) | |
15 | lgscl 13709 | . . . . . . 7 ⊢ ((𝐴 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝐴 /L 𝑁) ∈ ℤ) | |
16 | 13, 14, 15 | syl2anc 409 | . . . . . 6 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ ∧ 𝑁 ≠ 0) → (𝐴 /L 𝑁) ∈ ℤ) |
17 | 16 | zcnd 9335 | . . . . 5 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ ∧ 𝑁 ≠ 0) → (𝐴 /L 𝑁) ∈ ℂ) |
18 | 17 | mulid2d 7938 | . . . 4 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ ∧ 𝑁 ≠ 0) → (1 · (𝐴 /L 𝑁)) = (𝐴 /L 𝑁)) |
19 | 8, 12, 18 | 3eqtrd 2207 | . . 3 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ ∧ 𝑁 ≠ 0) → (𝐴 /L -𝑁) = (𝐴 /L 𝑁)) |
20 | 19 | 3expa 1198 | . 2 ⊢ (((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ) ∧ 𝑁 ≠ 0) → (𝐴 /L -𝑁) = (𝐴 /L 𝑁)) |
21 | simpr 109 | . . . 4 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ) → 𝑁 ∈ ℤ) | |
22 | 0zd 9224 | . . . 4 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ) → 0 ∈ ℤ) | |
23 | zdceq 9287 | . . . 4 ⊢ ((𝑁 ∈ ℤ ∧ 0 ∈ ℤ) → DECID 𝑁 = 0) | |
24 | 21, 22, 23 | syl2anc 409 | . . 3 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ) → DECID 𝑁 = 0) |
25 | dcne 2351 | . . 3 ⊢ (DECID 𝑁 = 0 ↔ (𝑁 = 0 ∨ 𝑁 ≠ 0)) | |
26 | 24, 25 | sylib 121 | . 2 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ) → (𝑁 = 0 ∨ 𝑁 ≠ 0)) |
27 | 5, 20, 26 | mpjaodan 793 | 1 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ) → (𝐴 /L -𝑁) = (𝐴 /L 𝑁)) |
Colors of variables: wff set class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 103 ∨ wo 703 DECID wdc 829 ∧ w3a 973 = wceq 1348 ∈ wcel 2141 ≠ wne 2340 ifcif 3526 class class class wbr 3989 (class class class)co 5853 0cc0 7774 1c1 7775 · cmul 7779 < clt 7954 -cneg 8091 ℕ0cn0 9135 ℤcz 9212 /L clgs 13692 |
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 609 ax-in2 610 ax-io 704 ax-5 1440 ax-7 1441 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-10 1498 ax-11 1499 ax-i12 1500 ax-bndl 1502 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-i5r 1528 ax-13 2143 ax-14 2144 ax-ext 2152 ax-coll 4104 ax-sep 4107 ax-nul 4115 ax-pow 4160 ax-pr 4194 ax-un 4418 ax-setind 4521 ax-iinf 4572 ax-cnex 7865 ax-resscn 7866 ax-1cn 7867 ax-1re 7868 ax-icn 7869 ax-addcl 7870 ax-addrcl 7871 ax-mulcl 7872 ax-mulrcl 7873 ax-addcom 7874 ax-mulcom 7875 ax-addass 7876 ax-mulass 7877 ax-distr 7878 ax-i2m1 7879 ax-0lt1 7880 ax-1rid 7881 ax-0id 7882 ax-rnegex 7883 ax-precex 7884 ax-cnre 7885 ax-pre-ltirr 7886 ax-pre-ltwlin 7887 ax-pre-lttrn 7888 ax-pre-apti 7889 ax-pre-ltadd 7890 ax-pre-mulgt0 7891 ax-pre-mulext 7892 ax-arch 7893 ax-caucvg 7894 |
This theorem depends on definitions: df-bi 116 df-stab 826 df-dc 830 df-3or 974 df-3an 975 df-tru 1351 df-fal 1354 df-xor 1371 df-nf 1454 df-sb 1756 df-eu 2022 df-mo 2023 df-clab 2157 df-cleq 2163 df-clel 2166 df-nfc 2301 df-ne 2341 df-nel 2436 df-ral 2453 df-rex 2454 df-reu 2455 df-rmo 2456 df-rab 2457 df-v 2732 df-sbc 2956 df-csb 3050 df-dif 3123 df-un 3125 df-in 3127 df-ss 3134 df-nul 3415 df-if 3527 df-pw 3568 df-sn 3589 df-pr 3590 df-op 3592 df-uni 3797 df-int 3832 df-iun 3875 df-br 3990 df-opab 4051 df-mpt 4052 df-tr 4088 df-id 4278 df-po 4281 df-iso 4282 df-iord 4351 df-on 4353 df-ilim 4354 df-suc 4356 df-iom 4575 df-xp 4617 df-rel 4618 df-cnv 4619 df-co 4620 df-dm 4621 df-rn 4622 df-res 4623 df-ima 4624 df-iota 5160 df-fun 5200 df-fn 5201 df-f 5202 df-f1 5203 df-fo 5204 df-f1o 5205 df-fv 5206 df-isom 5207 df-riota 5809 df-ov 5856 df-oprab 5857 df-mpo 5858 df-1st 6119 df-2nd 6120 df-recs 6284 df-irdg 6349 df-frec 6370 df-1o 6395 df-2o 6396 df-oadd 6399 df-er 6513 df-en 6719 df-dom 6720 df-fin 6721 df-sup 6961 df-inf 6962 df-pnf 7956 df-mnf 7957 df-xr 7958 df-ltxr 7959 df-le 7960 df-sub 8092 df-neg 8093 df-reap 8494 df-ap 8501 df-div 8590 df-inn 8879 df-2 8937 df-3 8938 df-4 8939 df-5 8940 df-6 8941 df-7 8942 df-8 8943 df-n0 9136 df-z 9213 df-uz 9488 df-q 9579 df-rp 9611 df-fz 9966 df-fzo 10099 df-fl 10226 df-mod 10279 df-seqfrec 10402 df-exp 10476 df-ihash 10710 df-cj 10806 df-re 10807 df-im 10808 df-rsqrt 10962 df-abs 10963 df-clim 11242 df-proddc 11514 df-dvds 11750 df-gcd 11898 df-prm 12062 df-phi 12165 df-pc 12239 df-lgs 13693 |
This theorem is referenced by: (None) |
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