The product is a hardback textbook titled “Functional Analysis” by authors Frigyes Riesz and Béla Sz.-Nagy. Published in 1955 by Frederick Ungar Publishing in the United States, this book is a classic in the field of mathematics, specifically focusing on functional analysis and mathematical analysis. With 462 pages, this textbook is written in English and is designed for adult education and university students looking to deepen their understanding of functional analysis concepts. The book’s cover includes a dust jacket and weighs approximately 1.95 pounds, making it a substantial and comprehensive resource for students in this subject area.