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| Mirrors > Home > MPE Home > Th. List > lgsneg1 | Structured version Visualization version 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 11429 | . . . 4 ⊢ -0 = 0 | |
| 2 | simpr 484 | . . . . 5 ⊢ (((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ) ∧ 𝑁 = 0) → 𝑁 = 0) | |
| 3 | 2 | negeqd 11376 | . . . 4 ⊢ (((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ) ∧ 𝑁 = 0) → -𝑁 = -0) |
| 4 | 1, 3, 2 | 3eqtr4a 2797 | . . 3 ⊢ (((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ) ∧ 𝑁 = 0) → -𝑁 = 𝑁) |
| 5 | 4 | oveq2d 7374 | . 2 ⊢ (((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ) ∧ 𝑁 = 0) → (𝐴 /L -𝑁) = (𝐴 /L 𝑁)) |
| 6 | nn0z 12514 | . . . . 5 ⊢ (𝐴 ∈ ℕ0 → 𝐴 ∈ ℤ) | |
| 7 | lgsneg 27290 | . . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝑁 ≠ 0) → (𝐴 /L -𝑁) = (if(𝐴 < 0, -1, 1) · (𝐴 /L 𝑁))) | |
| 8 | 6, 7 | syl3an1 1163 | . . . 4 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ ∧ 𝑁 ≠ 0) → (𝐴 /L -𝑁) = (if(𝐴 < 0, -1, 1) · (𝐴 /L 𝑁))) |
| 9 | nn0nlt0 12429 | . . . . . . 7 ⊢ (𝐴 ∈ ℕ0 → ¬ 𝐴 < 0) | |
| 10 | 9 | 3ad2ant1 1133 | . . . . . 6 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ ∧ 𝑁 ≠ 0) → ¬ 𝐴 < 0) |
| 11 | 10 | iffalsed 4490 | . . . . 5 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ ∧ 𝑁 ≠ 0) → if(𝐴 < 0, -1, 1) = 1) |
| 12 | 11 | oveq1d 7373 | . . . 4 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ ∧ 𝑁 ≠ 0) → (if(𝐴 < 0, -1, 1) · (𝐴 /L 𝑁)) = (1 · (𝐴 /L 𝑁))) |
| 13 | 6 | 3ad2ant1 1133 | . . . . . . 7 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ ∧ 𝑁 ≠ 0) → 𝐴 ∈ ℤ) |
| 14 | simp2 1137 | . . . . . . 7 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ ∧ 𝑁 ≠ 0) → 𝑁 ∈ ℤ) | |
| 15 | lgscl 27280 | . . . . . . 7 ⊢ ((𝐴 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝐴 /L 𝑁) ∈ ℤ) | |
| 16 | 13, 14, 15 | syl2anc 584 | . . . . . 6 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ ∧ 𝑁 ≠ 0) → (𝐴 /L 𝑁) ∈ ℤ) |
| 17 | 16 | zcnd 12599 | . . . . 5 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ ∧ 𝑁 ≠ 0) → (𝐴 /L 𝑁) ∈ ℂ) |
| 18 | 17 | mullidd 11152 | . . . 4 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ ∧ 𝑁 ≠ 0) → (1 · (𝐴 /L 𝑁)) = (𝐴 /L 𝑁)) |
| 19 | 8, 12, 18 | 3eqtrd 2775 | . . 3 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ ∧ 𝑁 ≠ 0) → (𝐴 /L -𝑁) = (𝐴 /L 𝑁)) |
| 20 | 19 | 3expa 1118 | . 2 ⊢ (((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ) ∧ 𝑁 ≠ 0) → (𝐴 /L -𝑁) = (𝐴 /L 𝑁)) |
| 21 | 5, 20 | pm2.61dane 3019 | 1 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝑁 ∈ ℤ) → (𝐴 /L -𝑁) = (𝐴 /L 𝑁)) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 ∧ w3a 1086 = wceq 1541 ∈ wcel 2113 ≠ wne 2932 ifcif 4479 class class class wbr 5098 (class class class)co 7358 0cc0 11028 1c1 11029 · cmul 11033 < clt 11168 -cneg 11367 ℕ0cn0 12403 ℤcz 12490 /L clgs 27263 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2184 ax-ext 2708 ax-rep 5224 ax-sep 5241 ax-nul 5251 ax-pow 5310 ax-pr 5377 ax-un 7680 ax-cnex 11084 ax-resscn 11085 ax-1cn 11086 ax-icn 11087 ax-addcl 11088 ax-addrcl 11089 ax-mulcl 11090 ax-mulrcl 11091 ax-mulcom 11092 ax-addass 11093 ax-mulass 11094 ax-distr 11095 ax-i2m1 11096 ax-1ne0 11097 ax-1rid 11098 ax-rnegex 11099 ax-rrecex 11100 ax-cnre 11101 ax-pre-lttri 11102 ax-pre-lttrn 11103 ax-pre-ltadd 11104 ax-pre-mulgt0 11105 ax-pre-sup 11106 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3061 df-rmo 3350 df-reu 3351 df-rab 3400 df-v 3442 df-sbc 3741 df-csb 3850 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-pss 3921 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-int 4903 df-iun 4948 df-br 5099 df-opab 5161 df-mpt 5180 df-tr 5206 df-id 5519 df-eprel 5524 df-po 5532 df-so 5533 df-fr 5577 df-we 5579 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-pred 6259 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-riota 7315 df-ov 7361 df-oprab 7362 df-mpo 7363 df-om 7809 df-1st 7933 df-2nd 7934 df-frecs 8223 df-wrecs 8254 df-recs 8303 df-rdg 8341 df-1o 8397 df-2o 8398 df-oadd 8401 df-er 8635 df-en 8886 df-dom 8887 df-sdom 8888 df-fin 8889 df-sup 9347 df-inf 9348 df-dju 9815 df-card 9853 df-pnf 11170 df-mnf 11171 df-xr 11172 df-ltxr 11173 df-le 11174 df-sub 11368 df-neg 11369 df-div 11797 df-nn 12148 df-2 12210 df-3 12211 df-n0 12404 df-xnn0 12477 df-z 12491 df-uz 12754 df-q 12864 df-rp 12908 df-fz 13426 df-fzo 13573 df-fl 13714 df-mod 13792 df-seq 13927 df-exp 13987 df-hash 14256 df-cj 15024 df-re 15025 df-im 15026 df-sqrt 15160 df-abs 15161 df-dvds 16182 df-gcd 16424 df-prm 16601 df-phi 16695 df-pc 16767 df-lgs 27264 |
| This theorem is referenced by: (None) |
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