mathieu_even_coef(m, q)
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.
Order of Mathieu functions. Must be non-negative.
Parameter of Mathieu functions. Must be non-negative.
Even or odd Fourier coefficients, corresponding to even or odd m.
Fourier coefficients for even Mathieu and modified Mathieu functions.
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