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  (c) TransEra Corp, 2021

I1e

Scaled modified Bessel function of the first kind, order one.
 
Loading        LOADSUB ALL FROM "BESMC.HTS"
or LOADSUB FROM "MATHLIB.HTS"
 
Usage                REAL X,Y
Y=FNI1e(X)
 
Description                
FNI1e returns the value of the modified cylindrical Bessel function of the first kind and order one of x scaled by e-|x|, e-|x|I1(x). The scaling is done so that the value of I1(x) can be evaluated for arguments of large absolute value, where the absolute value of I1(x) may be larger than MAXREAL, the largest value representable. The absolute value of e-|x|I1(x) is moderate for arguments of large absolute value.
 
Errors                
FNI1e causes an HTBasic error if its argument is not of type REAL.
 
See Also
I0e, I1, In
 
e-|x|I1(x)