Landen Inequalities for Zero-Balanced Hypergeometric Functions
: Simic S, Vuorinen M
Publisher: HINDAWI PUBLISHING CORPORATION
: 2012
: Abstract and Applied Analysis
: ABSTRACT AND APPLIED ANALYSIS
: ABSTR APPL ANAL
: 93261
: 11
: 1085-3375
DOI: https://doi.org/10.1155/2012/932061
For zero-balanced Gaussian hypergeometric functions F(a, b; a + b; x), a, b > 0, we determine maximal regions of ab plane where well-known Landen identities for the complete elliptic integral of the first kind turn on respective inequalities valid for each x is an element of (0, 1). Thereby an exhausting answer is given to the open problem from the work by Anderson et al., 1990.