kelvin(x) = <ufunc 'kelvin'>¶
Kelvin functions as complex numbers
Be, Ke, Bep, Kep
The tuple (Be, Ke, Bep, Kep) contains complex numbers representing the real and imaginary Kelvin functions and their derivatives evaluated at x. For example, kelvin(x).real = ber x and kelvin(x).imag = bei x with similar relationships for ker and kei.