Dirichlet eta
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(Redirected from Dirichlet eta function)
Let $\mathrm{Re} \hspace{2pt} z > 0$, then define $$\eta(z) = \displaystyle\sum_{n=1}^{\infty} \dfrac{(-1)^{n-1}}{n^z}.$$
Graph of $\eta$.
Domain coloring of $\eta$.
