A Further Extension for Ramanujan’s Beta Integral and Applications

Abstract

In 1915, Ramanujan stated the following formula ∫ 0 ∞ t x - 1 ( - a t ; q ) ∞ ( - t ; q ) ∞ d t = π sin π x ( q 1 - x , a ; q ) ∞ ( q , a q - x ; q ) ∞ , where 0 < q < 1 , x > 0 , and 0 < a < q x . The above formula is called Ramanujan’s beta integral. In this paper, by using q-exponential operator, we further extend Ramanujan’s beta integral. As some applications, we obtain some new integral formulas of Ramanujan and also show some new representation with gamma functions and q-gamma functions.

Keywords

• <em>q</em>-series
• <em>q</em>-exponential operator
• <em>q</em>-binomial theorem
• <em>q</em>-Gauss formula
• <em>q</em>-gamma function
• gamma function
• Ramanujan’s beta integral