TeX:
\sum_{n=-\infty}^{\infty} \operatorname{sinc}^{4}\!\left(n\right) = \frac{2 \pi}{3}Definitions:
| Fungrim symbol | Notation | Short description |
|---|---|---|
| Sum | Sum | |
| Pow | Power | |
| Sinc | Sinc function | |
| Infinity | Positive infinity | |
| Pi | The constant pi (3.14...) |
Source code for this entry:
Entry(ID("49514d"),
Formula(Equal(Sum(Pow(Sinc(n), 4), For(n, Neg(Infinity), Infinity)), Div(Mul(2, Pi), 3))))