This volume presents a systematic treatment of the theory of unbounded linear operators in normed linear spaces with applications to differential equations. Lar

*-algebras of unbounded operators in Hilbert space, or more generally algebraic systems of unbounded operators, occur in a natural way in unitary representation

This book provides the reader with a comprehensive introduction to functional analysis. Topics include normed linear and Hilbert spaces, the Hahn-Banach theorem

This book is an updated version of the classic 1987 monograph "Spectral Theory and Differential Operators".The original book was a cutting edge account of the t

This open access book provides a solution theory for time-dependent partial differential equations, which classically have not been accessible by a unified meth