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Results tagged with gm.general-mathematics
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user 19899
Questions about mathematics which don't fall into the other arXiv categories. If you have a general question about mathematics but it is not research level, it's off-topic but it might be welcomed on Mathematics Stack Exchange.
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Simplifying finite sum over 1/(ax+b)
Can I simplify:
\begin{equation}
\sum_{x=x_0}^{x_1} \frac{1}{ax+b}
\end{equation}
- 561
1
vote
Simplifying finite sum over 1/(ax+b)
Using some Taylor approximations it turns out there's a fast approximation here. Code below.
float fastdigamma (float x) {
float twopx = 2.f + x;
return - (1.f + 2.f * x) / (x * (1.f + x))
…
- 561