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Fungrim entry: 1f9beb

∑n=−∞∞sinc⁡2 ⁣(n)=π\sum_{n=-\infty}^{\infty} \operatorname{sinc}^{2}\!\left(n\right) = \pi
TeX:
\sum_{n=-\infty}^{\infty} \operatorname{sinc}^{2}\!\left(n\right) = \pi
Definitions:
Fungrim symbol Notation Short description
Sum∑nf(n)\sum_{n} f(n) Sum
Powab{a}^{b} Power
Sincsinc⁡(z)\operatorname{sinc}(z) Sinc function
Infinity∞\infty Positive infinity
Piπ\pi The constant pi (3.14...)
Source code for this entry:
Entry(ID("1f9beb"),
    Formula(Equal(Sum(Pow(Sinc(n), 2), For(n, Neg(Infinity), Infinity)), Pi)))

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2021-03-15 19:12:00.328586 UTC