Spherical Hankel function of the first kind, order one.
Loading LOADSUB ALL FROM "BESRS.HTS"
or LOADSUB FROM "MATHLIB.HTS"
Usage REAL X
COMPLEX C
C=FNS_h11(X)
Description
FNS_h11returns the value of the spherical Hankel function of the first kind and order one ofx,h1(1)(x). The real component returned containsj1(x) and the imaginary component returned containsy1(x).
H1(1)(x) is sometimes also called thespherical Bessel function of the third kind, order 1.
Errors
FNS_h11causes an HTBasic error if its argument is not of type REAL. It also causes an error if the value ofxis near zero, since the imaginary component ofh1(1)(0) is -.