Computes the modified Bessel function of the second kind, \( K_0(x)=\int_{0}^{\infty}\frac{\cos(x\tau)}
{\sqrt{\tau^2+1}}\,\mathrm{d}\tau\).
It is a solution \( x^{2}y''+xy'-x^2y=0\) for which \( y(0) = \infty\).
Defined in header
#include <eve/module/bessel.hpp>
{
template< eve::floating_real_value T >
}
constexpr callable_cyl_bessel_k0_ cyl_bessel_k0
Computes the modified Bessel function of the second kind, .
Definition: cyl_bessel_k0.hpp:54
Definition: all_of.hpp:22
Parameters
x
: real floating argument.
Return value
The value of \( \displaystyle K_0(x)=\int_{0}^{\infty}\frac{\cos(x\tau)}
{\sqrt{\tau^2+1}}\,\mathrm{d}\tau\) is returned.
#include <eve/module/bessel.hpp>
#include <eve/wide.hpp>
#include <iostream>
int main()
{
wide_ft pf = {0.5, 1.5, 0.1, 1.0, 19.0, 25.0, 21.5, 10000.0};
std::cout << "---- simd" << '\n'
<< "<- pf = " << pf << '\n'
;
double xd = 1.0;
std::cout << "---- scalar" << '\n'
<< "<- xd = " << xd << '\n'
return 0;
}
Wrapper for SIMD registers.
Definition: wide.hpp:65