Kelvin_bei
Definition:
/math-e25f5313750d9b48015e5d87d6ff05d4.png "bei = kelvin\_bei(x)")
evaluates an approximation to the Kelvin function bei x.
The function is based on several Chebyshev expansions. For large x, there is a danger of the result being totally inaccurate, as the error amplification factor grows in an essentially exponential manner; therefore the function must fail.
For more information please review the s19abc function in the NAG document.
Parameters:
- x (input, double)
- The argument x of the function.
- bei (output, double)
- Approximation of the Kelvin function bei x.