ISBN-13: 9780387906096 / Angielski / Twarda / 1981 / 252 str.
ISBN-13: 9780387906096 / Angielski / Twarda / 1981 / 252 str.
This book is a very well-accepted introduction to the subject. In it, the author identifies the significant aspects of the theory and explores them with a limited amount of machinery from mathematical analysis. Now, in this fourth edition, the book has again been updated with an additional chapter on Lewy's example of a linear equation without solutions.