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| Mirrors > Home > MPE Home > Th. List > 4sqlem8 | Structured version Visualization version GIF version | ||
| Description: Lemma for 4sq 17157. (Contributed by Mario Carneiro, 15-Jul-2014.) |
| Ref | Expression |
|---|---|
| 4sqlem5.2 | ⊢ (𝜑 → 𝐴 ∈ ℤ) |
| 4sqlem5.3 | ⊢ (𝜑 → 𝑀 ∈ ℕ) |
| 4sqlem5.4 | ⊢ 𝐵 = (((𝐴 + (𝑀 / 2)) mod 𝑀) − (𝑀 / 2)) |
| Ref | Expression |
|---|---|
| 4sqlem8 | ⊢ (𝜑 → 𝑀 ∥ ((𝐴↑2) − (𝐵↑2))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 4sqlem5.3 | . . 3 ⊢ (𝜑 → 𝑀 ∈ ℕ) | |
| 2 | 1 | nnzd 12732 | . 2 ⊢ (𝜑 → 𝑀 ∈ ℤ) |
| 3 | 4sqlem5.2 | . . 3 ⊢ (𝜑 → 𝐴 ∈ ℤ) | |
| 4 | 4sqlem5.4 | . . . . 5 ⊢ 𝐵 = (((𝐴 + (𝑀 / 2)) mod 𝑀) − (𝑀 / 2)) | |
| 5 | 3, 1, 4 | 4sqlem5 17135 | . . . 4 ⊢ (𝜑 → (𝐵 ∈ ℤ ∧ ((𝐴 − 𝐵) / 𝑀) ∈ ℤ)) |
| 6 | 5 | simpld 500 | . . 3 ⊢ (𝜑 → 𝐵 ∈ ℤ) |
| 7 | 3, 6 | zsubcld 12821 | . 2 ⊢ (𝜑 → (𝐴 − 𝐵) ∈ ℤ) |
| 8 | zsqcl 14285 | . . . 4 ⊢ (𝐴 ∈ ℤ → (𝐴↑2) ∈ ℤ) | |
| 9 | 3, 8 | syl 18 | . . 3 ⊢ (𝜑 → (𝐴↑2) ∈ ℤ) |
| 10 | zsqcl 14285 | . . . 4 ⊢ (𝐵 ∈ ℤ → (𝐵↑2) ∈ ℤ) | |
| 11 | 6, 10 | syl 18 | . . 3 ⊢ (𝜑 → (𝐵↑2) ∈ ℤ) |
| 12 | 9, 11 | zsubcld 12821 | . 2 ⊢ (𝜑 → ((𝐴↑2) − (𝐵↑2)) ∈ ℤ) |
| 13 | 5 | simprd 501 | . . 3 ⊢ (𝜑 → ((𝐴 − 𝐵) / 𝑀) ∈ ℤ) |
| 14 | 1 | nnne0d 12401 | . . . 4 ⊢ (𝜑 → 𝑀 ≠ 0) |
| 15 | dvdsval2 16440 | . . . 4 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ (𝐴 − 𝐵) ∈ ℤ) → (𝑀 ∥ (𝐴 − 𝐵) ↔ ((𝐴 − 𝐵) / 𝑀) ∈ ℤ)) | |
| 16 | 2, 14, 7, 15 | syl3anc 1398 | . . 3 ⊢ (𝜑 → (𝑀 ∥ (𝐴 − 𝐵) ↔ ((𝐴 − 𝐵) / 𝑀) ∈ ℤ)) |
| 17 | 13, 16 | mpbird 260 | . 2 ⊢ (𝜑 → 𝑀 ∥ (𝐴 − 𝐵)) |
| 18 | 3, 6 | zaddcld 12820 | . . . 4 ⊢ (𝜑 → (𝐴 + 𝐵) ∈ ℤ) |
| 19 | dvdsmul2 16463 | . . . 4 ⊢ (((𝐴 + 𝐵) ∈ ℤ ∧ (𝐴 − 𝐵) ∈ ℤ) → (𝐴 − 𝐵) ∥ ((𝐴 + 𝐵) · (𝐴 − 𝐵))) | |
| 20 | 18, 7, 19 | syl2anc 596 | . . 3 ⊢ (𝜑 → (𝐴 − 𝐵) ∥ ((𝐴 + 𝐵) · (𝐴 − 𝐵))) |
| 21 | 3 | zcnd 12817 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ℂ) |
| 22 | 6 | zcnd 12817 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ ℂ) |
| 23 | subsq 14367 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((𝐴↑2) − (𝐵↑2)) = ((𝐴 + 𝐵) · (𝐴 − 𝐵))) | |
| 24 | 21, 22, 23 | syl2anc 596 | . . 3 ⊢ (𝜑 → ((𝐴↑2) − (𝐵↑2)) = ((𝐴 + 𝐵) · (𝐴 − 𝐵))) |
| 25 | 20, 24 | breqtrrd 5136 | . 2 ⊢ (𝜑 → (𝐴 − 𝐵) ∥ ((𝐴↑2) − (𝐵↑2))) |
| 26 | 2, 7, 12, 17, 25 | dvdstrd 16480 | 1 ⊢ (𝜑 → 𝑀 ∥ ((𝐴↑2) − (𝐵↑2))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 = wceq 1569 ∈ wcel 2146 ≠ wne 2959 class class class wbr 5106 (class class class)co 7430 ℂcc 11211 0cc0 11213 + caddc 11216 · cmul 11218 − cmin 11554 / cdiv 11986 ℕcn 12348 2c2 12410 ℤcz 12706 mod cmo 14022 ↑cexp 14217 ∥ cdvds 16437 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2196 ax-12 2215 ax-ext 2735 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7761 ax-cnex 11269 ax-resscn 11270 ax-1cn 11271 ax-icn 11272 ax-addcl 11273 ax-addrcl 11274 ax-mulcl 11275 ax-mulrcl 11276 ax-mulcom 11277 ax-addass 11278 ax-mulass 11279 ax-distr 11280 ax-i2m1 11281 ax-1ne0 11282 ax-1rid 11283 ax-rnegex 11284 ax-rrecex 11285 ax-cnre 11286 ax-pre-lttri 11287 ax-pre-lttrn 11288 ax-pre-ltadd 11289 ax-pre-mulgt0 11290 ax-pre-sup 11291 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2101 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-iun 4956 df-br 5107 df-opab 5171 df-mpt 5190 df-tr 5216 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6311 df-ord 6372 df-on 6373 df-lim 6374 df-suc 6375 df-iota 6501 df-fun 6549 df-fn 6550 df-f 6551 df-f1 6552 df-fo 6553 df-f1o 6554 df-fv 6555 df-riota 7387 df-ov 7433 df-oprab 7434 df-mpo 7435 df-om 7888 df-2nd 8012 df-frecs 8313 df-wrecs 8344 df-recs 8393 df-rdg 8432 df-er 8731 df-en 8988 df-dom 8989 df-sdom 8990 df-sup 9447 df-inf 9448 df-pnf 11358 df-mnf 11359 df-xr 11360 df-ltxr 11361 df-le 11362 df-sub 11556 df-neg 11557 df-div 11987 df-nn 12349 df-2 12418 df-n0 12620 df-z 12707 df-uz 12979 df-rp 13134 df-fl 13945 df-mod 14023 df-seq 14158 df-exp 14218 df-dvds 16438 |
| This theorem is used by: 4sqlem14 17151 2sqlem8 27768 |
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