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# scipy.special.mathieu_even_coef

`scipy.special.``mathieu_even_coef`(m, q)

  Fourier coefficients for even Mathieu and modified Mathieu functions.

  The Fourier series of the even solutions of the Mathieu differential equation are of the form

  \[\mathrm{ce}_{2n}(z, q) = \sum_{k=0}^{\infty} A_{(2n)}^{(2k)} \cos 2kz\]
  \[\mathrm{ce}_{2n+1}(z, q) = \sum_{k=0}^{\infty} A_{(2n+1)}^{(2k+1)} \cos (2k+1)z\]

  This function returns the coefficients \(A_{(2n)}^{(2k)}\) for even input m=2n, and the coefficients \(A_{(2n+1)}^{(2k+1)}\) for odd input m=2n+1.

  Parameters: | m : int Order of Mathieu functions. Must be non-negative. q : float (>=0) Parameter of Mathieu functions. Must be non-negative.
  Returns: | Ak : ndarray Even or odd Fourier coefficients, corresponding to even or odd m.

  References

  [R490] | Zhang, Shanjie and Jin, Jianming. “Computation of Special Functions”, John Wiley and Sons, 1996. http://jin.ece.illinois.edu/specfunc.html

  [R491] | NIST Digital Library of Mathematical Functions http://dlmf.nist.gov/28.4#i