Abstract

A class of hyperelliptic integrals are expressed through hypergeometric functions, like those of Gauss, Lauricella and Appell, namely multiple power series. Whenever they can on their own be reduced to elliptic integrals through an algebraic transformation, we obtain a two-fold representation of the same mathematical object, and then several completely new π determinations through the above special functions and/or Euler integrals.AllourπformulaehavebeensuccesfullytestedbymeansofconvenientMathematica’s packages and enter in a wide historical/sound context of π- formulae quite far from being exhausted. Due to their structure, the formulae’s practical value does not lie in computing π, but in allowing, through π, a benchmark for computing the involved special functions, particularly those less elementary.