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| Mirrors > Home > MPE Home > Th. List > Mathboxes > 41prothprmlem1 | Structured version Visualization version GIF version | ||
| Description: Lemma 1 for 41prothprm 48253. (Contributed by AV, 4-Jul-2020.) |
| Ref | Expression |
|---|---|
| 41prothprm.p | ⊢ 𝑃 = ;41 |
| Ref | Expression |
|---|---|
| 41prothprmlem1 | ⊢ ((𝑃 − 1) / 2) = ;20 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 41prothprm.p | . . . . . 6 ⊢ 𝑃 = ;41 | |
| 2 | dfdec10 12710 | . . . . . 6 ⊢ ;41 = ((;10 · 4) + 1) | |
| 3 | 1, 2 | eqtri 2792 | . . . . 5 ⊢ 𝑃 = ((;10 · 4) + 1) |
| 4 | 3 | oveq1i 7418 | . . . 4 ⊢ (𝑃 − 1) = (((;10 · 4) + 1) − 1) |
| 5 | 10nn 12727 | . . . . . . 7 ⊢ ;10 ∈ ℕ | |
| 6 | 5 | nncni 12239 | . . . . . 6 ⊢ ;10 ∈ ℂ |
| 7 | 4cn 12322 | . . . . . 6 ⊢ 4 ∈ ℂ | |
| 8 | 6, 7 | mulcli 11212 | . . . . 5 ⊢ (;10 · 4) ∈ ℂ |
| 9 | pncan1 11634 | . . . . 5 ⊢ ((;10 · 4) ∈ ℂ → (((;10 · 4) + 1) − 1) = (;10 · 4)) | |
| 10 | 8, 9 | ax-mp 5 | . . . 4 ⊢ (((;10 · 4) + 1) − 1) = (;10 · 4) |
| 11 | 4, 10 | eqtri 2792 | . . 3 ⊢ (𝑃 − 1) = (;10 · 4) |
| 12 | 11 | oveq1i 7418 | . 2 ⊢ ((𝑃 − 1) / 2) = ((;10 · 4) / 2) |
| 13 | 2cn 12312 | . . . 4 ⊢ 2 ∈ ℂ | |
| 14 | 2ne0 12343 | . . . 4 ⊢ 2 ≠ 0 | |
| 15 | 6, 7, 13, 14 | divassi 11967 | . . 3 ⊢ ((;10 · 4) / 2) = (;10 · (4 / 2)) |
| 16 | 4div2e2 12408 | . . . . 5 ⊢ (4 / 2) = 2 | |
| 17 | 16 | oveq2i 7419 | . . . 4 ⊢ (;10 · (4 / 2)) = (;10 · 2) |
| 18 | 2nn0 12517 | . . . . 5 ⊢ 2 ∈ ℕ0 | |
| 19 | 18 | dec0u 12733 | . . . 4 ⊢ (;10 · 2) = ;20 |
| 20 | 17, 19 | eqtri 2792 | . . 3 ⊢ (;10 · (4 / 2)) = ;20 |
| 21 | 15, 20 | eqtri 2792 | . 2 ⊢ ((;10 · 4) / 2) = ;20 |
| 22 | 12, 21 | eqtri 2792 | 1 ⊢ ((𝑃 − 1) / 2) = ;20 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1567 ∈ wcel 2149 (class class class)co 7408 ℂcc 11094 0cc0 11096 1c1 11097 + caddc 11099 · cmul 11101 − cmin 11437 / cdiv 11867 2c2 12291 4c4 12293 ;cdc 12707 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-sep 5258 ax-nul 5268 ax-pow 5334 ax-pr 5402 ax-un 7730 ax-resscn 11153 ax-1cn 11154 ax-icn 11155 ax-addcl 11156 ax-addrcl 11157 ax-mulcl 11158 ax-mulrcl 11159 ax-mulcom 11160 ax-addass 11161 ax-mulass 11162 ax-distr 11163 ax-i2m1 11164 ax-1ne0 11165 ax-1rid 11166 ax-rnegex 11167 ax-rrecex 11168 ax-cnre 11169 ax-pre-lttri 11170 ax-pre-lttrn 11171 ax-pre-ltadd 11172 ax-pre-mulgt0 11173 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-nel 3071 df-ral 3086 df-rex 3096 df-rmo 3376 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4874 df-iun 4959 df-br 5111 df-opab 5175 df-mpt 5194 df-tr 5220 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6299 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-riota 7365 df-ov 7411 df-oprab 7412 df-mpo 7413 df-om 7859 df-2nd 7983 df-frecs 8274 df-wrecs 8305 df-recs 8354 df-rdg 8393 df-er 8690 df-en 8940 df-dom 8941 df-sdom 8942 df-pnf 11241 df-mnf 11242 df-xr 11243 df-ltxr 11244 df-le 11245 df-sub 11439 df-neg 11440 df-div 11868 df-nn 12230 df-2 12299 df-3 12300 df-4 12301 df-5 12302 df-6 12303 df-7 12304 df-8 12305 df-9 12306 df-n0 12501 df-dec 12708 |
| This theorem is referenced by: 41prothprmlem2 48252 |
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