Uniform asymptotic expansions for generalised trigonometric integrals and their zeros
Abstract
Asymptotic expansions for generalised trigonometric integrals are obtained in terms of elementary functions, which are valid for large values of the parameter a and unbounded complex values of the argument. These follow from new Liouville-Green asymptotic expansions for incomplete gamma functions. Asymptotic expansions for the real zeros of the generalised trigonometric integrals are then constructed for large a which are uniformly valid without restriction on their size (small or large).
Fields of Study & Subjects
Mathematical functions and polynomials
Mathematical Inequalities and Applications
Mathematical Analysis and Transform Methods
Publication details
- Journal / source
- Journal of Mathematical Analysis and Applications
- Volume
- 560
- Issue
- 1
- Pages
- 130493–130493
- Publication date
- 7 February 2026
- Language
- EN