KelvinKer
KelvinKer[z] gives the Kelvin function ker(z).
KelvinKer[n, z] gives the Kelvin function ker_n(z).
Examples
Compute Kelvin ker:
KelvinKer[2.0]
(* -0.04166 *)Plot:
Plot[KelvinKer[x], {x, 0, 10}]Please visit the official Wolfram Language Reference for more details.