(2015) López García, José Luis; Pagola Martínez, Pedro Jesús; Pérez Sinusía, Ester; Ingeniería Matemática e Informática; Matematika eta Informatika Ingeniaritza
We can use the power series definition of 3F2(a1, a2, a3; b1, b2; z) to compute this function for
z in the unit disk only. In this paper we obtain new expansions of this function that are convergent
in larger domains. Some of these expansions involve the polynomial 3F2(a1,−n, a3; b1, b2; z)
evaluated at certain points z. Other expansions involve the Gauss hypergeometric function 2F1.
The domain of convergence is sometimes a disk, other times a half-plane, other times the region
|z|2 < 4|1 − z|. The accuracy of the approximation given by these expansions is illustrated with
numerical experiments.
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