bessely

Bessel function of the second kind.

Category: Mathematics > Elementary Math

Syntax

Y = bessely(nu, Z)

Returns Y_nu(Z).

Y = bessely(nu, Z, 1)

Returns the function scaled by exp(-abs(imag(Z))).

Description

Y_nu is the second solution of Bessel's equation, independent of J_nu. It oscillates like J_nu but diverges to minus infinity at the origin. A general solution is a combination of J_nu and Y_nu, as in the radial part of waves in a circular domain that includes a hole at the center.

Input arguments

nu
Order (real).
Z
Real or complex argument.

Output arguments

Y
Values of the function. For negative real Z the result is complex.

Example

Second-kind Bessel function

bessely(0, 1)
bessely(1, 2)
Output
ans = 0.0883
ans = -0.1070

See also

besselj besselh besselk besseli