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| Mirrors > Home > MPE Home > Th. List > Mathboxes > 41prothprmlem1 | Structured version Visualization version GIF version | ||
| Description: Lemma 1 for 41prothprm 48673. (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 12810 | . . . . . 6 ⊢ ;41 = ((;10 · 4) + 1) | |
| 3 | 1, 2 | eqtri 2784 | . . . . 5 ⊢ 𝑃 = ((;10 · 4) + 1) |
| 4 | 3 | oveq1i 7428 | . . . 4 ⊢ (𝑃 − 1) = (((;10 · 4) + 1) − 1) |
| 5 | 10nn 12827 | . . . . . . 7 ⊢ ;10 ∈ ℕ | |
| 6 | 5 | nncni 12338 | . . . . . 6 ⊢ ;10 ∈ ℂ |
| 7 | 4cn 12421 | . . . . . 6 ⊢ 4 ∈ ℂ | |
| 8 | 6, 7 | mulcli 11309 | . . . . 5 ⊢ (;10 · 4) ∈ ℂ |
| 9 | pncan1 11733 | . . . . 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 2784 | . . 3 ⊢ (𝑃 − 1) = (;10 · 4) |
| 12 | 11 | oveq1i 7428 | . 2 ⊢ ((𝑃 − 1) / 2) = ((;10 · 4) / 2) |
| 13 | 2cn 12411 | . . . 4 ⊢ 2 ∈ ℂ | |
| 14 | 2ne0 12442 | . . . 4 ⊢ 2 ≠ 0 | |
| 15 | 6, 7, 13, 14 | divassi 12066 | . . 3 ⊢ ((;10 · 4) / 2) = (;10 · (4 / 2)) |
| 16 | 4div2e2 12507 | . . . . 5 ⊢ (4 / 2) = 2 | |
| 17 | 16 | oveq2i 7429 | . . . 4 ⊢ (;10 · (4 / 2)) = (;10 · 2) |
| 18 | 2nn0 12616 | . . . . 5 ⊢ 2 ∈ ℕ0 | |
| 19 | 18 | dec0u 12833 | . . . 4 ⊢ (;10 · 2) = ;20 |
| 20 | 17, 19 | eqtri 2784 | . . 3 ⊢ (;10 · (4 / 2)) = ;20 |
| 21 | 15, 20 | eqtri 2784 | . 2 ⊢ ((;10 · 4) / 2) = ;20 |
| 22 | 12, 21 | eqtri 2784 | 1 ⊢ ((𝑃 − 1) / 2) = ;20 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 ∈ wcel 2145 (class class class)co 7418 ℂcc 11191 0cc0 11193 1c1 11194 + caddc 11196 · cmul 11198 − cmin 11534 / cdiv 11966 2c2 12390 4c4 12392 ;cdc 12807 |
| 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 7749 ax-resscn 11250 ax-1cn 11251 ax-icn 11252 ax-addcl 11253 ax-addrcl 11254 ax-mulcl 11255 ax-mulrcl 11256 ax-mulcom 11257 ax-addass 11258 ax-mulass 11259 ax-distr 11260 ax-i2m1 11261 ax-1ne0 11262 ax-1rid 11263 ax-rnegex 11264 ax-rrecex 11265 ax-cnre 11266 ax-pre-lttri 11267 ax-pre-lttrn 11268 ax-pre-ltadd 11269 ax-pre-mulgt0 11270 |
| 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 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7375 df-ov 7421 df-oprab 7422 df-mpo 7423 df-om 7876 df-2nd 8000 df-frecs 8292 df-wrecs 8323 df-recs 8372 df-rdg 8411 df-er 8710 df-en 8967 df-dom 8968 df-sdom 8969 df-pnf 11338 df-mnf 11339 df-xr 11340 df-ltxr 11341 df-le 11342 df-sub 11536 df-neg 11537 df-div 11967 df-nn 12329 df-2 12398 df-3 12399 df-4 12400 df-5 12401 df-6 12402 df-7 12403 df-8 12404 df-9 12405 df-n0 12600 df-dec 12808 |
| This theorem is used by: 41prothprmlem2 48672 |
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