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Fungrim entry: e00d9e

π=3∫0∞(θ3 ⁣(0,it)−1) dt\pi = 3 \int_{0}^{\infty} \left(\theta_{3}\!\left(0 , i t\right) - 1\right) \, dt
TeX:
\pi = 3 \int_{0}^{\infty} \left(\theta_{3}\!\left(0 , i t\right) - 1\right) \, dt
Definitions:
Fungrim symbol Notation Short description
Piπ\pi The constant pi (3.14...)
Integral∫abf(x) dx\int_{a}^{b} f(x) \, dx Integral
JacobiThetaθj ⁣(z,τ)\theta_{j}\!\left(z , \tau\right) Jacobi theta function
ConstIii Imaginary unit
Infinity∞\infty Positive infinity
Source code for this entry:
Entry(ID("e00d9e"),
    Formula(Equal(Pi, Mul(3, Integral(Parentheses(Sub(JacobiTheta(3, 0, Mul(ConstI, t)), 1)), For(t, 0, Infinity))))))

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2021-03-15 19:12:00.328586 UTC