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Fungrim entry: 69fe63

π=2n=14n24n21\pi = 2 \prod_{n=1}^{\infty} \frac{4 {n}^{2}}{4 {n}^{2} - 1}
TeX:
\pi = 2 \prod_{n=1}^{\infty} \frac{4 {n}^{2}}{4 {n}^{2} - 1}
Definitions:
Fungrim symbol Notation Short description
Piπ\pi The constant pi (3.14...)
Productnf(n)\prod_{n} f(n) Product
Powab{a}^{b} Power
Infinity\infty Positive infinity
Source code for this entry:
Entry(ID("69fe63"),
    Formula(Equal(Pi, Mul(2, Product(Div(Mul(4, Pow(n, 2)), Sub(Mul(4, Pow(n, 2)), 1)), For(n, 1, Infinity))))))

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2020-04-08 16:14:44.404316 UTC