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u=z\overline{z},\hspace{1em}v=(z^m+\overline{z}^m)

\phi(x) = f(x) + \lambda \int_a^b k(x,t)\,\phi(t)\,dt
d(n)
P(X=n
\phi(x) = f(x) + \lambda \int_a^b k(x,t)\,\phi(t)\,dt