The modified Bessel function of the second kind of z in Math. A solution of the differential equation
\[ \frac{d^2 f}{dz^2} + \frac{1}{z} \frac{df}{dz} - \left[ 1 + \frac{n^2}{z^2} \right] f = 0 \]The second linearly independent solution of this equation for integer order is besselI.
Real part on the real axis:
Imaginary part on the real axis:
Real part on the imaginary axis:
Imaginary part on the imaginary axis:
Real part on the complex plane:
Imaginary part on the complex plane:
Absolute value on the complex plane:
Related functions: besselI
Function category: Bessel functions