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| Mirrors > Home > MPE Home > Th. List > 4sqlem8 | Structured version Visualization version GIF version | ||
| Description: Lemma for 4sq 17050. (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 12636 | . 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 17028 | . . . 4 ⊢ (𝜑 → (𝐵 ∈ ℤ ∧ ((𝐴 − 𝐵) / 𝑀) ∈ ℤ)) |
| 6 | 5 | simpld 500 | . . 3 ⊢ (𝜑 → 𝐵 ∈ ℤ) |
| 7 | 3, 6 | zsubcld 12725 | . 2 ⊢ (𝜑 → (𝐴 − 𝐵) ∈ ℤ) |
| 8 | zsqcl 14187 | . . . 4 ⊢ (𝐴 ∈ ℤ → (𝐴↑2) ∈ ℤ) | |
| 9 | 3, 8 | syl 18 | . . 3 ⊢ (𝜑 → (𝐴↑2) ∈ ℤ) |
| 10 | zsqcl 14187 | . . . 4 ⊢ (𝐵 ∈ ℤ → (𝐵↑2) ∈ ℤ) | |
| 11 | 6, 10 | syl 18 | . . 3 ⊢ (𝜑 → (𝐵↑2) ∈ ℤ) |
| 12 | 9, 11 | zsubcld 12725 | . 2 ⊢ (𝜑 → ((𝐴↑2) − (𝐵↑2)) ∈ ℤ) |
| 13 | 5 | simprd 501 | . . 3 ⊢ (𝜑 → ((𝐴 − 𝐵) / 𝑀) ∈ ℤ) |
| 14 | 1 | nnne0d 12305 | . . . 4 ⊢ (𝜑 → 𝑀 ≠ 0) |
| 15 | dvdsval2 16339 | . . . 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 12724 | . . . 4 ⊢ (𝜑 → (𝐴 + 𝐵) ∈ ℤ) |
| 19 | dvdsmul2 16362 | . . . 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 12721 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ℂ) |
| 22 | 6 | zcnd 12721 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ ℂ) |
| 23 | subsq 14268 | . . . 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 5141 | . 2 ⊢ (𝜑 → (𝐴 − 𝐵) ∥ ((𝐴↑2) − (𝐵↑2))) |
| 26 | 2, 7, 12, 17, 25 | dvdstrd 16379 | 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 2146 ≠ wne 2960 class class class wbr 5111 (class class class)co 7419 ℂcc 11117 0cc0 11119 + caddc 11122 · cmul 11124 − cmin 11460 / cdiv 11890 ℕcn 12252 2c2 12314 ℤcz 12610 mod cmo 13924 ↑cexp 14119 ∥ cdvds 16336 |
| 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 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7742 ax-cnex 11175 ax-resscn 11176 ax-1cn 11177 ax-icn 11178 ax-addcl 11179 ax-addrcl 11180 ax-mulcl 11181 ax-mulrcl 11182 ax-mulcom 11183 ax-addass 11184 ax-mulass 11185 ax-distr 11186 ax-i2m1 11187 ax-1ne0 11188 ax-1rid 11189 ax-rnegex 11190 ax-rrecex 11191 ax-cnre 11192 ax-pre-lttri 11193 ax-pre-lttrn 11194 ax-pre-ltadd 11195 ax-pre-mulgt0 11196 ax-pre-sup 11197 |
| 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 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3067 df-ral 3082 df-rex 3092 df-rmo 3371 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-iun 4960 df-br 5112 df-opab 5176 df-mpt 5195 df-tr 5221 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6306 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7376 df-ov 7422 df-oprab 7423 df-mpo 7424 df-om 7869 df-2nd 7993 df-frecs 8284 df-wrecs 8315 df-recs 8364 df-rdg 8403 df-er 8700 df-en 8950 df-dom 8951 df-sdom 8952 df-sup 9409 df-inf 9410 df-pnf 11264 df-mnf 11265 df-xr 11266 df-ltxr 11267 df-le 11268 df-sub 11462 df-neg 11463 df-div 11891 df-nn 12253 df-2 12322 df-n0 12524 df-z 12611 df-uz 12883 df-rp 13037 df-fl 13847 df-mod 13925 df-seq 14060 df-exp 14120 df-dvds 16337 |
| This theorem is used by: 4sqlem14 17044 2sqlem8 27645 |
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