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Ein Function


\begin{displaymath}
\mathop{\rm Ein}(z) \equiv \int_0^z {(1-e^{-t})\,dt\over t} = {\rm E}_1(z)+\ln z+\gamma,
\end{displaymath}

where $\gamma$ is the Euler-Mascheroni Constant and E${}_1$ is the En-Function with $n=1$.

See also En-Function




© 1996-9 Eric W. Weisstein
1999-05-25