Function rgsl::exponential_integrals::Chi_e
source · pub fn Chi_e(x: f64) -> Result<Result, Value>
Expand description
This routine computes the integral Chi(x) := \Re[ \gamma_E + \log(x) + \int_0^x dt (\cosh(t)-1)/t] , where \gamma_E is the Euler constant (available as the macro M_EULER).