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| Mirrors > Home > MPE Home > Th. List > Mathboxes > fmtno | Structured version Visualization version GIF version | ||
| Description: The 𝑁 th Fermat number. (Contributed by AV, 13-Jun-2021.) |
| Ref | Expression |
|---|---|
| fmtno | ⊢ (𝑁 ∈ ℕ0 → (FermatNo‘𝑁) = ((2↑(2↑𝑁)) + 1)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-fmtno 47716 | . 2 ⊢ FermatNo = (𝑛 ∈ ℕ0 ↦ ((2↑(2↑𝑛)) + 1)) | |
| 2 | oveq2 7364 | . . . 4 ⊢ (𝑛 = 𝑁 → (2↑𝑛) = (2↑𝑁)) | |
| 3 | 2 | oveq2d 7372 | . . 3 ⊢ (𝑛 = 𝑁 → (2↑(2↑𝑛)) = (2↑(2↑𝑁))) |
| 4 | 3 | oveq1d 7371 | . 2 ⊢ (𝑛 = 𝑁 → ((2↑(2↑𝑛)) + 1) = ((2↑(2↑𝑁)) + 1)) |
| 5 | id 22 | . 2 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ ℕ0) | |
| 6 | ovexd 7391 | . 2 ⊢ (𝑁 ∈ ℕ0 → ((2↑(2↑𝑁)) + 1) ∈ V) | |
| 7 | 1, 4, 5, 6 | fvmptd3 6962 | 1 ⊢ (𝑁 ∈ ℕ0 → (FermatNo‘𝑁) = ((2↑(2↑𝑁)) + 1)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1541 ∈ wcel 2113 Vcvv 3438 ‘cfv 6490 (class class class)co 7356 1c1 11025 + caddc 11027 2c2 12198 ℕ0cn0 12399 ↑cexp 13982 FermatNocfmtno 47715 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2706 ax-sep 5239 ax-nul 5249 ax-pr 5375 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2809 df-nfc 2883 df-ne 2931 df-ral 3050 df-rex 3059 df-rab 3398 df-v 3440 df-dif 3902 df-un 3904 df-ss 3916 df-nul 4284 df-if 4478 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-br 5097 df-opab 5159 df-mpt 5178 df-id 5517 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-iota 6446 df-fun 6492 df-fv 6498 df-ov 7359 df-fmtno 47716 |
| This theorem is referenced by: fmtnoge3 47718 fmtnom1nn 47720 fmtnoodd 47721 fmtnof1 47723 fmtnorec1 47725 fmtnosqrt 47727 fmtno0 47728 fmtno1 47729 fmtnorec2lem 47730 fmtnorec3 47736 fmtnorec4 47737 fmtno2 47738 fmtno3 47739 fmtno4 47740 fmtnoprmfac1lem 47752 fmtno4prm 47763 2pwp1prmfmtno 47778 |
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