FNKerreturns the value of the real Kelvin function of the second kind of the valuex. Although ker(x) is defined for all values ofxexcept zero, values ofxnear zero may produce results greater than MAXREAL, the largest value representable. Note that sometimes Kelvin functions are written with an order, as in ker3(x). In this notation, the functionFNKerreturns the value of ker0(x).
Errors
FNKercauses an HTBasic error if its argument is not of type REAL, ifxis negative or zero, or if the value returned would be larger than MAXREAL.
