| Pré. | Proc. |
i0e
Modified Bessel function of order zero, exponentially scaled.SYNOPSIS:
double x, y, i0e();
y = i0e(x);
DESCRIPTION:
Returns exponentially scaled modified Bessel function of order zero of the argument.
The function is defined as i0e(x) = exp(-|x|) j0(ix).
ACCURACY:
Relative error:
arithmetic domain # trials peak rms
IEEE 0,30 30000 5.4e-16 1.2e-16