The Fuglede-Putnam Theory

This book is essentially a survey of results on the Fuglede-Putnam theorem and its generalizations in a wide variety of directions. Presenting a broad overview of the results obtained in the field since the early 1950s, this is the first monograph to be dedicated to this powerful tool and its variants.
Starting from historical notes and classical versions with their different proofs, the book then explores asymptotic versions, generalizations to non-normal operators, generalizations to unbounded operators, counterexamples, applications, intertwining relations, and conjectures. A rich collection of applications is included.
Aimed at postgraduate students as well as researchers interested in operator theory, this book could also be taught as a specialized course.

Provides a survey of results on the Fuglede-Putnam theorem Contains many applications, examples, and counterexamples Offers the first comprehensive treatment of this theory within the literature

Résumé
"This monograph is informative, and it collects several interesting results from the single variable operator theory." (Sameer Chavan, zbMATH 1512.47003, 2023)

Contenu

• 1. Classical Versions and Some Historical Notes. - 2. Generalizations to Bounded Nonnormal Operators. - 3. Asymptotic Versions. - 4. Generalizations of the Fuglede-Putnam Theorem to Banach Algebras and Spaces. - 5. Generalizations to Unbounded Operators. - 6. Some Applications. - 7. Some Other Intertwining Relations. - 8. Conjectures.