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  (c) TransEra Corp, 2021
Ihn
Modified Bessel function of the first kind, order n+½.
 
Loading        LOADSUB ALL FROM "BESMS.HTS"
or LOADSUB FROM "MATHLIB.HTS"
 
Usage                INTEGER N
REAL X,Y
Y=FNIhn(N,X)
 
Description                
FNIhn returns the value of the modified cylindrical Bessel function of the first kind and order n+½ of x, In+½(x). In+½(x) is defined for all values of n and all positive values of x. If n is positive or zero, In+½(x) is also defined for x = 0.
 
Errors                
FNIhn causes an HTBasic error if its arguments are not of the types shown in the USAGE section, above, or if x is out of the range of definition explained above.
 
See Also
In, Khn
 
In+½(x)
Note
The algorithm used computes the value of In+½ using a recursion from the values of I½ and I1½. The computation time increases with n and the computation accuracy decreases with n.