Wronskians of theta functions and series for $1/\pi$
In this article, we define functions analogous to Ramanujan's function
$f(m)$ defined in his famous paper
"Modular equations and approximations to $1/\pi$".
We then show how these new functions lead to simpler
formulas for series for $1/\pi$
associated with the classical, cubic and quartic base.
The following version is available:
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