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In this article using the theory of Eisenstein series, we give rise to thecomplete evaluation of two Gauss hypergeometric functions. Moreover we evaluatethe modulus of each of these functions and the values of the functions in termsof the complete elliptic integral of the first kind. As application we give wayof how to evaluate the parameters, in a closed-well posed form, of a generalRamanujan type $1/\pi$ formula. The result is a formula of 110 digits per term.

Eisenstein Series, Alternative Modular Bases and Approximations of $1/\pi$