File:ChebyshevPsi.png
ChebyshevPsi.png (499 × 308 pixels, file size: 7 KB, MIME type: image/png)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 19:25, 2 July 2006 | 499 × 308 (7 KB) | wikimediacommons>Dantheox | Plot of Chebyshev's <math>\psi</math> function, along with the approximation <math>x-\log 2\pi</math>. This function can be defined in Mathematica by: ψ[n_] := Sum[If[PrimeQ[p], Floor[Log[n]/Log[p]] Log[p], 0], {p, 2, n}] SetAttributes[ψ, Listabl |
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