A Note on the 2F1 Hypergeometric Function

Details A Note on the 2F1 Hypergeometric Function A Note on the 2F1 Hypergeometric Function

2009-12-04

arxiv.org/abs/0912.0917v1

J. Math. Res. vol. 2, no. 3, (2010), 71--77

Mathematics

Classical Analysis and ODEs

7 pages; accepted by J. Math. Res

Scientific paper

The special case of the hypergeometric function $_{2}F_{1}$ represents the binomial series $(1+x)^{\alpha}=\sum_{n=0}^{\infty}(\:\alpha n\:)x^{n}$ that always converges when $|x|<1$. Convergence of the series at the endpoints, $x=\pm 1$, depends on the values of $\alpha$ and needs to be checked in every concrete case. In this note, using new approach, we reprove the convergence of the hypergeometric series $_{2}F_{1}(\alpha,\beta;\beta;x)$ for $|x|<1$ and obtain new result on its convergence at point $x=-1$ for every integer $\alpha\neq 0$. The proof is within a new theoretical setting based on the new method for reorganizing the integers and on the regular method for summation of divergent series.

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