Complex Variables

by Robert B. Ash, W. P. Novinger

This text on complex variables is geared toward graduate students and undergraduates who have taken an introductory course in real analysis. It is a substantially revised and updated edition of the popular text by Robert B. Ash, offering a concise treatment that provides careful and complete explanations as well as numerous problems and solutions.
An introduction presents basic definitions, covering topology of the plane, analytic functions, real-differentiability and the Cauchy-Riemann equations, and exponential and harmonic functions. Succeeding chapters examine the elementary theory and the general Cauchy theorem and its applications, including singularities, residue theory, the open mapping theorem for analytic functions, linear fractional transformations, conformal mapping, and analytic mappings of one disk to another. The Riemann mapping theorem receives a thorough treatment, along with factorization of analytic functions. As an application of many of the ideas and results appearing in earlier chapters, the text ends with a proof of the prime number theorem.

Genres: Mathematics

224 pages, Paperback

First published January 1, 1971

About the author

Professor Emeritus, Mathematics
University of Illinois at Urbana-Champaign

Reviews

[John Hammond]

This is a good reference book. The dover edition is cheap, and the text is entirely available online for free.
That said, we used it for an introduction, and it wasn't great for that. I recommend Asmar's text for a solid intro.

[Liora Sophie]

readable, precise, organized. There are also solutions to all the exercises on their website. This was an excellent guide to the course. Highly recommended.