## Introduction to asymptotics and special functions.(English)Zbl 0308.41023

New York - London: Academic Press, a subsidiary of Harcourt Brace Jovanovich, Publishers. XII, 297 p. \$ 10.00; £4.80 (1974).

### MSC:

 41A60 Asymptotic approximations, asymptotic expansions (steepest descent, etc.) 34A12 Initial value problems, existence, uniqueness, continuous dependence and continuation of solutions to ordinary differential equations 34E05 Asymptotic expansions of solutions to ordinary differential equations 41-01 Introductory exposition (textbooks, tutorial papers, etc.) pertaining to approximations and expansions 33C05 Classical hypergeometric functions, $${}_2F_1$$ 33C10 Bessel and Airy functions, cylinder functions, $${}_0F_1$$ 33B15 Gamma, beta and polygamma functions