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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 47991 | . 2 ⊢ FermatNo = (𝑛 ∈ ℕ0 ↦ ((2↑(2↑𝑛)) + 1)) | |
| 2 | oveq2 7375 | . . . 4 ⊢ (𝑛 = 𝑁 → (2↑𝑛) = (2↑𝑁)) | |
| 3 | 2 | oveq2d 7383 | . . 3 ⊢ (𝑛 = 𝑁 → (2↑(2↑𝑛)) = (2↑(2↑𝑁))) |
| 4 | 3 | oveq1d 7382 | . 2 ⊢ (𝑛 = 𝑁 → ((2↑(2↑𝑛)) + 1) = ((2↑(2↑𝑁)) + 1)) |
| 5 | id 22 | . 2 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ ℕ0) | |
| 6 | ovexd 7402 | . 2 ⊢ (𝑁 ∈ ℕ0 → ((2↑(2↑𝑁)) + 1) ∈ V) | |
| 7 | 1, 4, 5, 6 | fvmptd3 6971 | 1 ⊢ (𝑁 ∈ ℕ0 → (FermatNo‘𝑁) = ((2↑(2↑𝑁)) + 1)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1542 ∈ wcel 2114 Vcvv 3429 ‘cfv 6498 (class class class)co 7367 1c1 11039 + caddc 11041 2c2 12236 ℕ0cn0 12437 ↑cexp 14023 FermatNocfmtno 47990 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2708 ax-sep 5231 ax-nul 5241 ax-pr 5375 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3062 df-rab 3390 df-v 3431 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-br 5086 df-opab 5148 df-mpt 5167 df-id 5526 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-iota 6454 df-fun 6500 df-fv 6506 df-ov 7370 df-fmtno 47991 |
| This theorem is referenced by: fmtnoge3 47993 fmtnom1nn 47995 fmtnoodd 47996 fmtnof1 47998 fmtnorec1 48000 fmtnosqrt 48002 fmtno0 48003 fmtno1 48004 fmtnorec2lem 48005 fmtnorec3 48011 fmtnorec4 48012 fmtno2 48013 fmtno3 48014 fmtno4 48015 fmtnoprmfac1lem 48027 fmtno4prm 48038 2pwp1prmfmtno 48053 |
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