| Mathbox for Alexander van der Vekens |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > fmtnorn | Structured version Visualization version GIF version | ||
| Description: A Fermat number is a function value of the enumeration of the Fermat numbers. (Contributed by AV, 3-Aug-2021.) |
| Ref | Expression |
|---|---|
| fmtnorn | ⊢ (𝐹 ∈ ran FermatNo ↔ ∃𝑛 ∈ ℕ0 (FermatNo‘𝑛) = 𝐹) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ovex 7443 | . . 3 ⊢ ((2↑(2↑𝑛)) + 1) ∈ V | |
| 2 | df-fmtno 48308 | . . 3 ⊢ FermatNo = (𝑛 ∈ ℕ0 ↦ ((2↑(2↑𝑛)) + 1)) | |
| 3 | 1, 2 | fnmpti 6678 | . 2 ⊢ FermatNo Fn ℕ0 |
| 4 | fvelrnb 6941 | . 2 ⊢ (FermatNo Fn ℕ0 → (𝐹 ∈ ran FermatNo ↔ ∃𝑛 ∈ ℕ0 (FermatNo‘𝑛) = 𝐹)) | |
| 5 | 3, 4 | ax-mp 5 | 1 ⊢ (𝐹 ∈ ran FermatNo ↔ ∃𝑛 ∈ ℕ0 (FermatNo‘𝑛) = 𝐹) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 = wceq 1570 ∈ wcel 2143 ∃wrex 3089 ran crn 5662 Fn wfn 6531 ‘cfv 6536 (class class class)co 7410 1c1 11105 + caddc 11107 2c2 12299 ℕ0cn0 12508 ↑cexp 14102 FermatNocfmtno 48307 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5257 ax-nul 5269 ax-pr 5404 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4488 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-br 5110 df-opab 5174 df-mpt 5193 df-id 5556 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-iota 6492 df-fun 6538 df-fn 6539 df-fv 6544 df-ov 7413 df-fmtno 48308 |
| This theorem is used by: prmdvdsfmtnof1lem2 48365 prmdvdsfmtnof 48366 prmdvdsfmtnof1 48367 |
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