Functional Analysis: An Elementary Introduction (Graduate Studies in Mathematics)

Markus Haase's beautiful book lives up to its promise: it provides a well-structured and gentle introduction to the fundamental concepts of functional analysis...The presentation is clear, the applications are insightful, and the large collection of exercises allow us to deepen the study of the presented material. Graduate students, as well as interested undergraduate students can easily profit from this well-written book." -Bela Gabor Pusztai, ACTA Sci. Math.