A short course on spectral theory

Thisbookpresentsthebasictoolsofmodernanalysiswithinthecontextofwhatmightbecalledthefundamentalproblemofoperatortheory:tocalculatespectraofspecificoperatorsoninfinite-dimensionalspaces,especiallyoperatorsonHilbertspaces.Thetoolsarediverse,andtheyprovidethebasisformorerefinedmethodsthata