Ellison-Mendès-France Constant
where
is the Euler-Mascheroni Constant, and 
is the Ellision-Mendès-France constant (given incorrectly by Le Lionnais 1983).
References
Ellison, W. J. and Mendès-France, M. Les nombres premiers. Paris: Hermann, 1975. Le Lionnais, F. Les nombres remarquables. Paris: Hermann, p. 47, 1983.
- Elliptic Fixed Point (Map)
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