TeX:
\pi = 8 \sum_{n=0}^{\infty} \frac{1}{\left(4 n + 1\right) \left(4 n + 3\right)}Definitions:
| Fungrim symbol | Notation | Short description |
|---|---|---|
| Pi | The constant pi (3.14...) | |
| Sum | Sum | |
| Infinity | Positive infinity |
Source code for this entry:
Entry(ID("338055"),
Formula(Equal(Pi, Mul(8, Sum(Div(1, Mul(Add(Mul(4, n), 1), Add(Mul(4, n), 3))), For(n, 0, Infinity))))))