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Chebyshev Function


\begin{displaymath}
\theta(x)\equiv \sum_{p\leq x} \ln p,
\end{displaymath}

where the sum is over Primes $p$, so

\begin{displaymath}
\lim_{x\to\infty} {x\over\theta(x)} = 1.
\end{displaymath}




© 1996-9 Eric W. Weisstein
1999-05-26