Is there an adaptive quadrature integrator which accepts "Inifinity" bounds?

Hipparchus development
1

Is there an adaptive quadrature integrator available in hipparchus which accepts “Inifinity” bounds?

I found this implemementation on Github which accepts Infinity bounds:

2

The answer depends on the weighting function. You can look at GaussIntegratorFactory. The Gauss-Laguerre integrator will compute \int_{0}^{+\infty}e^{-x}f(x) dx, whereas the Gauss-Hermite integrator will compute \int_{-\infty}^{+\infty}e^{-\frac{x^2}{2}}f(x) dx.

3

The “Laguerre” and “Hermite” implementations doesn’t seem to have “flexible changeable bounds”, if used in a scripting language.
The above Java implementation is similar to what Julia supports:

and could also be implemented for “arbitrary-precision arithmetic”.

4

OK.
Could you open an issue so we add Gauss-Kronrod quadrature?

5

Done: