K1e

Scaled modified Bessel function of the second kind, order one.

Loading LOADSUB ALL FROM "BESMC.HTS"

or LOADSUB FROM "MATHLIB.HTS"

Usage REAL X,Y

Y=FNK1e(X)

Description

K1e returns the value of the modified cylindrical Bessel function of the second kind and order one of x scaled by ex, exK1(x). Although exK1(x) is defined for all positive values of x, values of x near zero may cause the absolute value of the result to be larger than MAXREAL, the largest value representable. The scaling is done so that the value of K1(x) can be evaluated for large arguments, where the absolute value of K1(x) may be near zero.

Errors

K1e causes an HTBasic error if its argument is not of type REAL, if x is not positive, or if the result would be larger than MAXREAL.

exK1(x)

See Also K0e, K1, Kn