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k1e

Modified Bessel function, third kind, order one, exponentially scaled.

SYNOPSIS:

double x, y, k1e();
y = k1e(x);

DESCRIPTION:

Returns the exponentially scaled, modified Bessel function of the third kind of order one of the argument:

      k1e(x) = exp(x) * k1(x).

ACCURACY:
                      Relative error:
arithmetic   domain     # trials      peak         rms
    IEEE      0, 30       30000       7.8e-16     1.2e-16