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| Mirrors > Home > MPE Home > Th. List > 4sqlem8 | Structured version Visualization version GIF version | ||
| Description: Lemma for 4sq 17142. (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 12719 | . 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 17120 | . . . 4 ⊢ (𝜑 → (𝐵 ∈ ℤ ∧ ((𝐴 − 𝐵) / 𝑀) ∈ ℤ)) |
| 6 | 5 | simpld 500 | . . 3 ⊢ (𝜑 → 𝐵 ∈ ℤ) |
| 7 | 3, 6 | zsubcld 12808 | . 2 ⊢ (𝜑 → (𝐴 − 𝐵) ∈ ℤ) |
| 8 | zsqcl 14272 | . . . 4 ⊢ (𝐴 ∈ ℤ → (𝐴↑2) ∈ ℤ) | |
| 9 | 3, 8 | syl 18 | . . 3 ⊢ (𝜑 → (𝐴↑2) ∈ ℤ) |
| 10 | zsqcl 14272 | . . . 4 ⊢ (𝐵 ∈ ℤ → (𝐵↑2) ∈ ℤ) | |
| 11 | 6, 10 | syl 18 | . . 3 ⊢ (𝜑 → (𝐵↑2) ∈ ℤ) |
| 12 | 9, 11 | zsubcld 12808 | . 2 ⊢ (𝜑 → ((𝐴↑2) − (𝐵↑2)) ∈ ℤ) |
| 13 | 5 | simprd 501 | . . 3 ⊢ (𝜑 → ((𝐴 − 𝐵) / 𝑀) ∈ ℤ) |
| 14 | 1 | nnne0d 12388 | . . . 4 ⊢ (𝜑 → 𝑀 ≠ 0) |
| 15 | dvdsval2 16425 | . . . 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 12807 | . . . 4 ⊢ (𝜑 → (𝐴 + 𝐵) ∈ ℤ) |
| 19 | dvdsmul2 16448 | . . . 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 12804 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ℂ) |
| 22 | 6 | zcnd 12804 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ ℂ) |
| 23 | subsq 14354 | . . . 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 5133 | . 2 ⊢ (𝜑 → (𝐴 − 𝐵) ∥ ((𝐴↑2) − (𝐵↑2))) |
| 26 | 2, 7, 12, 17, 25 | dvdstrd 16465 | 1 ⊢ (𝜑 → 𝑀 ∥ ((𝐴↑2) − (𝐵↑2))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 = wceq 1570 ∈ wcel 2145 ≠ wne 2956 class class class wbr 5103 (class class class)co 7420 ℂcc 11198 0cc0 11200 + caddc 11203 · cmul 11205 − cmin 11541 / cdiv 11973 ℕcn 12335 2c2 12397 ℤcz 12693 mod cmo 14009 ↑cexp 14204 ∥ cdvds 16422 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7751 ax-cnex 11256 ax-resscn 11257 ax-1cn 11258 ax-icn 11259 ax-addcl 11260 ax-addrcl 11261 ax-mulcl 11262 ax-mulrcl 11263 ax-mulcom 11264 ax-addass 11265 ax-mulass 11266 ax-distr 11267 ax-i2m1 11268 ax-1ne0 11269 ax-1rid 11270 ax-rnegex 11271 ax-rrecex 11272 ax-cnre 11273 ax-pre-lttri 11274 ax-pre-lttrn 11275 ax-pre-ltadd 11276 ax-pre-mulgt0 11277 ax-pre-sup 11278 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7878 df-2nd 8002 df-frecs 8299 df-wrecs 8330 df-recs 8379 df-rdg 8418 df-er 8717 df-en 8974 df-dom 8975 df-sdom 8976 df-sup 9434 df-inf 9435 df-pnf 11345 df-mnf 11346 df-xr 11347 df-ltxr 11348 df-le 11349 df-sub 11543 df-neg 11544 df-div 11974 df-nn 12336 df-2 12405 df-n0 12607 df-z 12694 df-uz 12966 df-rp 13121 df-fl 13932 df-mod 14010 df-seq 14145 df-exp 14205 df-dvds 16423 |
| This theorem is used by: 4sqlem14 17136 2sqlem8 27753 |
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