Suitable for advanced undergraduates and graduate students in mathematics, this introduction to topological groups presumes familiarity with the elementary concepts of set theory, elements of functional analysis, functions of real and complex variables, and the theory of functions of several variables. Chapters I to V deal with the algebraico-topological aspect of the subject, and Chapters VI to IX emphasize its analytical aspect.
After an introductory chapter on the fundamentals of topology and group theory, the treatment explores semitopological groups and the general theory of topological groups. An elementary study of locally compact topological groups is followed by proofs of the open homomorphism and closed graph theorems in a very general setting. Succeeding chapters examine the rudiments of analysis on topological groups. Topics include the Harr measure, finite-dimensional representations of groups, and duality theory and some of its applications. The volume concludes with a chapter that introduces Banach algebras.
Embark on a rigorous exploration of topological groups with Dr. Taqdir Husain's "Introduction to Topological Groups (Dover Books on Mathematics)," a comprehensive guide designed for advanced undergraduates and graduate students. This meticulously crafted volume, published by Dover Publications, delves into the intricate interplay between algebraic structures and topological spaces, providing a solid foundation for further study in related fields. Dr. Husain, a respected figure in the field of functional analysis and topological vector spaces, brings clarity and precision to this challenging subject. His approach assumes a working knowledge of essential mathematical concepts, including set theory, functional analysis, real and complex variables, and multivariable function theory, ensuring students are well-equipped to navigate the complexities of topological groups. This book distinguishes itself by its balanced treatment of both the algebraico-topological and analytical aspects of topological groups. Chapters I through V lay the groundwork, exploring the fundamental topological and group-theoretical concepts necessary for a deep understanding. These chapters carefully build from basic definitions to more advanced notions, providing a clear and logical progression. The latter half of the book, Chapters VI through IX, shifts focus to the analytical side, delving into crucial topics such as the Haar measure, a cornerstone of analysis on locally compact groups. The text presents finite-dimensional representations of groups with clarity, illuminating their significance in various areas of mathematics and physics. Further, it gives a comprehensive treatment to duality theory and its applications, equipping the reader with powerful tools for solving complex problems. The volume culminates with an introductory chapter on Banach algebras, linking topological groups to another vital area of functional analysis. Within these pages, readers will find rigorous proofs of the open homomorphism and closed graph theorems presented in a broader context than often encountered, showcasing the power and elegance of topological group theory. The treatment of locally compact topological groups is particularly noteworthy, offering an accessible yet thorough introduction to this important class of groups. Beyond its theoretical depth, "Introduction to Topological Groups" offers practical value through its clear exposition and numerous exercises (though these are not explicitly stated in the provided information, Dover math books often include them). Students will not only grasp the core concepts but also develop the problem-solving skills necessary for independent research. Whether you are a mathematics student seeking a comprehensive introduction or a researcher looking for a valuable reference, Dr. Husain's "Introduction to Topological Groups" is an indispensable resource. Its concise yet thorough coverage, combined with the author's expertise, makes it a classic text in the field. This Dover edition makes a timeless subject accessable once more.