## Grenz-Formel

An equation derived by Kronecker:

where

, is the Riemann Zeta Function, is the Dirichlet Eta Function, is the Gamma Function, and the primed sum omits infinite terms (Selberg and Chowla 1967).

References

Borwein, J. M. and Borwein, P. B. Pi & the AGM: A Study in Analytic Number Theory and Computational Complexity. New York: Wiley, pp. 296-297, 1987.

Selberg, A. and Chowla, S. On Epstein's Zeta-Function.'' J. Reine. Angew. Math. 227, 86-110, 1967.