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Visual Complex Functions: An Introduction with Phase Portraits 2012th Edition, Kindle Edition
This book provides a systematic introduction to functions of one complex variable. Its novel feature is the consistent use of special color representations – so-called phase portraits – which visualize functions as images on their domains.
Reading Visual Complex Functions requires no prerequisites except some basic knowledge of real calculus and plane geometry. The text is self-contained and covers all the main topics usually treated in a first course on complex analysis. With separate chapters on various construction principles, conformal mappings and Riemann surfaces it goes somewhat beyond a standard programme and leads the reader to more advanced themes.
In a second storyline, running parallel to the course outlined above, one learns how properties of complex functions are reflected in and can be read off from phase portraits. The book contains more than 200 of these pictorial representations which endow individual faces to analytic functions. Phase portraits enhance the intuitive understanding of concepts in complex analysis and are expected to be useful tools for anybody working with special functions – even experienced researchers may be inspired by the pictures to new and challenging questions.
Visual Complex Functions may also serve as a companion to other texts or as a reference work for advanced readers who wish to know more about phase portraits.
From the reviews:
“This textbook is an introduction to the classical theory of functions of one complex variable. Its distinctive feature are the graphical representations of functions, being the most useful tool in teaching and generally in mathematics. … The self-sufficiency of the textbook and the broad range of graphical examples makes the book useful for students as well as teachers of mathematics. … the book can be warmly recommended both to experts and to a new generation of mathematicians.” (Stanislawa Kanas, Zentralblatt MATH, Vol. 1264, 2013)
“Anyone who works with complex variables should read this book. … Visual Complex Functions is a beautiful and careful presentation of an entire advanced introduction to complex analysis based on phase portraits and, where appropriate, other kinds of computer-generated pictures. … My understanding of many ideas and phenomena deepened through reading this book.” (Lloyd N. Trefethen, SIAM Review, Vol. 55 (4), 2013)--This text refers to an alternate kindle_edition edition.
About the Author
- ASIN : B00DGEQP2Y
- Publisher : Birkhäuser; 2012th edition (August 30, 2012)
- Publication date : August 30, 2012
- Language : English
- File size : 24759 KB
- Text-to-Speech : Not enabled
- Enhanced typesetting : Not Enabled
- X-Ray for textbooks : Enabled
- Word Wise : Not Enabled
- Sticky notes : Not Enabled
- Print length : 374 pages
- Best Sellers Rank: #2,059,137 in Kindle Store (See Top 100 in Kindle Store)
- Customer Reviews:
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Top reviews from the United States
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Prof. Wegert would like his book to be suitable as an introduction to this field, and perhaps it may be. But for my money the importance of this book is for people who have already been introduced to complex variables and now want to _really_ understand them, to work with them. Every topic is enhanced by this treatment. There is nothing else like this book (apart from Wegert's own three annual calendars to date of "Complex Beauties"). In particular it is very different from Tristan Needham's 1997 text Visual Complex Analysis, which also takes a geometric tack but is not full of actual displays of actual functions.
Wegert's book is so striking that I assumed Birkhauser would have priced it at an absurd level, so that individuals would never buy a copy. Instead it is just around 60 dollars or 40 pounds. Amazing.
If you work with complex variables, buy this book. (- Nick Trefethen, Professor of Numerical Analysis, Oxford University)
Wegert's book also tries to double as a complex analysis textbook. In this respect it is less effective, and I'd recommend that you stick to a standard textbook. Wegert also has a slight tendency to "oversell" the book, for example with statements like "the notion of a Riemann surface becomes inevitable once we take the vantage point of phase portraits".
Notwithstanding, the usefulness of these phase portraits is enough to merit a five-star rating. This is an innovation I believe ought to be incorporated in other complex analysis textbooks (even if it requires them to be printed in color!).
Finally, this book might get compared to Needham's "Visual Complex Analysis". I'm less impressed with Needham's book, which introduces a lot of nifty original concepts but gets comparatively little mileage out of it. A beginning undergraduate student might enjoy Needham's book, but I believe that's the extent of the books usefulness. Wegert's book has much to offer for a graduate-level student.
Top reviews from other countries
Reviewed in Brazil 🇧🇷 on January 3, 2023