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Fungrim entry: 04cd99

π=1x2+1dx\pi = \int_{-\infty}^{\infty} \frac{1}{{x}^{2} + 1} \, dx
TeX:
\pi = \int_{-\infty}^{\infty} \frac{1}{{x}^{2} + 1} \, dx
Definitions:
Fungrim symbol Notation Short description
ConstPiπ\pi The constant pi (3.14...)
Integralabf ⁣(x)dx\int_{a}^{b} f\!\left(x\right) \, dx Integral
Powab{a}^{b} Power
Infinity\infty Positive infinity
Source code for this entry:
Entry(ID("04cd99"),
    Formula(Equal(ConstPi, Integral(Div(1, Add(Pow(x, 2), 1)), Tuple(x, Neg(Infinity), Infinity)))))

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2019-08-17 11:32:46.829430 UTC