Modified spherical Bessel function of the first kind and order zero.
Loading LOADSUB ALL FROM "BESMS.HTS"
or LOADSUB FROM "MATHLIB.HTS"
Usage REAL X,Y
Y=FNS_i0(X)
Description
FNS_i0returns the value of the modified spherical Bessel function of the first kind and order zero ofx,i0(x).I0(x) is defined for all values ofx, but large positive values ofxmay cause the result to be larger in magnitude than MAXREAL, the largest value representable.
Errors
FNS_i0causes an HTBasic error if its argument is not of type REAL or if the result would be larger than MAXREAL.