Applied functional analysis / J. Tinsley Oden and Leszek Demkowicz.

Includes bibliographical references and index.

This book provides a comprehensive introduction to applied functional analysis with emphasis on its mathematical foundations and applications in science and engineering. The text develops core topics including linear algebra, topology, metric spaces, Lebesgue measure and integration, Banach spaces, Hilbert spaces, bounded linear operators, weak compactness, and elements of spectral theory. Designed to support advanced study in numerical analysis, finite element methods, and applied mathematics, the work combines rigorous theoretical treatment with practical examples and contemporary applications. The third edition offers improved pedagogical presentation and expanded discussions intended for graduate students, researchers, and professionals in mathematics, physics, and engineering disciplines.