SciPy

scipy.special.k1

scipy.special.k1(x) = <ufunc 'k1'>

Modified Bessel function of the second kind of order 1, \(K_1(x)\).

Parameters:

x : array_like

Argument (float)

Returns:

K : ndarray

Value of the modified Bessel function K of order 1 at x.

See also

kv, k1e

Notes

The range is partitioned into the two intervals [0, 2] and (2, infinity). Chebyshev polynomial expansions are employed in each interval.

This function is a wrapper for the Cephes [R416] routine k1.

References

[R416](1, 2) Cephes Mathematical Functions Library, http://www.netlib.org/cephes/index.html

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