The Hankel function of the first kind of *z* in Math. Defined in terms of Bessel functions by

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: hankel2

Function category: Bessel functions