Gauss quadrature.

gaussIntegral

Integral of real f(x) over [a, b].

gaussIntegral

Integral of complex f(x) over [a, b].

gaussIntegralLog

Integral of real log(abs(x-xsing)) * f(x) function over [a, b].

gaussIntegralLog

Integral of complex log(abs(x-xsing)) * f(x) function over [a, b].

Gauss quadrature. These are general purpose procedures to compute 1-D quadratures using the Gauss-Legendre method. The function to integrate can be either double and complex<double>. However, the independent variable is always 'real', i.e. double. Use gaussIntegral for a smooth intregrands and gaussIntegralLog for integrands that have a log singularity.

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