# scipy.special.j1

scipy.special.j1(x) = <ufunc 'j1'>

  Bessel function of the first kind of order 1.

  Parameters
    x array_like

      Argument (float).

  Returns
    J ndarray

      Value of the Bessel function of the first kind of order 1 at x.

  See also

  `jv`
  `spherical_jn`

    spherical Bessel functions.

  Notes

  The domain is divided into the intervals [0, 8] and (8, infinity). In the first interval a 24 term Chebyshev expansion is used. In the second, the asymptotic trigonometric representation is employed using two rational functions of degree 5/5.

  This function is a wrapper for the Cephes [1] routine `j1`. It should not be confused with the spherical Bessel functions (see `spherical_jn`).

  References

  1

    Cephes Mathematical Functions Library, http://www.netlib.org/cephes/

scipy.special.j0 scipy.special.y0