Complex Kelvin function of the second kind of a real argument.
Loading LOADSUB ALL FROM "KELVIN.HTS"
or LOADSUB FROM "MATHLIB.HTS"
Usage REAL X
COMPLEX C
C=FNKe(X)
Description
FNKereturns the values of the real and imaginary Kelvin functions of the second kind of the valuex. The real part of the value returned is the value of ker(x) and the imaginary part is the value of kei(x). Although ker(x) and kei(x) are defined for all values ofxexcept zero, values ofxnear zero may produce results greater than MAXREAL, the largest value representable.
Errors
FNKecauses an HTBasic error if its argument is not of type REAL. It also causes an error ifxis zero or the value of either the real or imaginary component of the value returned would be larger than MAXREAL.