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Introduction to Functional Analysis by University of Leeds
This PDF book covers the following topics related to Functional Analysis :Basics of Metric Spaces, Basics of Linear Spaces, Orthogonality, Duality of Linear Spaces, Fourier Analysis, Operators, Spectral Theory, Compactness, The spectral theorem for compact normal operators, Banach and Normed Spaces, Measure Theory, Integration, Functional Spaces, Fourier Transform, Advances of Metric Spaces.
Author(s): Vladimir V. Kisil, School of Mathematics, University of Leeds
213 Pages 
Introduction to Functional Analysis by Christian Potzsche
This note explains the following topics: basic structures, Topological structures and boundary value problems.
Author(s): Munich University of Technology
73 Pages
Functional analysis lecture notes
This note covers normed linear spaces, Banach spaces, Linear transformations, Integration, Hilbert spaces and fourier analysis.
Author(s): T B Ward, University of East Anglia
73 Pages
Functional analysis and its applications
Functional analysis plays an important role in the applied sciences as well as in mathematics itself. These notes are intended to familiarize the student with the basic concepts, principles andmethods of functional analysis and its applications, and they are intended for senior undergraduate or beginning graduate students. Topics covered includes: Normed and Banach spaces, Continuous maps, Differentiation, Geometry of inner product spaces , Compact operators and Approximation of compact operators.
Author(s): Amol Sasane
92 Pages
Functional Analysis by Christian Remling
This note explains the following topics: Metric and topological spaces, Banach spaces, Consequences of Baire's Theorem, Dual spaces and weak topologies, Hilbert spaces, Operators in Hilbert spaces, Banach algebras, Commutative Banach algebras, and Spectral Theorem.
Author(s): Christian Remling
123 Pages