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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 48434 | . 2 ⊢ FermatNo = (𝑛 ∈ ℕ0 ↦ ((2↑(2↑𝑛)) + 1)) | |
| 2 | oveq2 7422 | . . . 4 ⊢ (𝑛 = 𝑁 → (2↑𝑛) = (2↑𝑁)) | |
| 3 | 2 | oveq2d 7430 | . . 3 ⊢ (𝑛 = 𝑁 → (2↑(2↑𝑛)) = (2↑(2↑𝑁))) |
| 4 | 3 | oveq1d 7429 | . 2 ⊢ (𝑛 = 𝑁 → ((2↑(2↑𝑛)) + 1) = ((2↑(2↑𝑁)) + 1)) |
| 5 | id 23 | . 2 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ ℕ0) | |
| 6 | ovexd 7449 | . 2 ⊢ (𝑁 ∈ ℕ0 → ((2↑(2↑𝑁)) + 1) ∈ V) | |
| 7 | 1, 4, 5, 6 | fvmptd3 7011 | 1 ⊢ (𝑁 ∈ ℕ0 → (FermatNo‘𝑁) = ((2↑(2↑𝑁)) + 1)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2145 Vcvv 3450 ‘cfv 6533 (class class class)co 7414 1c1 11128 + caddc 11130 2c2 12322 ℕ0cn0 12531 ↑cexp 14128 FermatNocfmtno 48433 |
| 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 2732 ax-sep 5251 ax-nul 5263 ax-pr 5398 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5550 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-iota 6489 df-fun 6535 df-fv 6541 df-ov 7417 df-fmtno 48434 |
| This theorem is used by: fmtnoge3 48436 fmtnom1nn 48438 fmtnoodd 48439 fmtnof1 48441 fmtnorec1 48443 fmtnosqrt 48445 fmtno0 48446 fmtno1 48447 fmtnorec2lem 48448 fmtnorec3 48454 fmtnorec4 48455 fmtno2 48456 fmtno3 48457 fmtno4 48458 fmtnoprmfac1lem 48470 fmtno4prm 48481 2pwp1prmfmtno 48496 |
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