These notes will be useful and of interest to mathematicians and physicists active in research as well as for students with some knowledge of the abstract theor
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 is the first monograph devoted to the Sturm oscillatory theory for infinite systems of differential equations and its relations with the spectral theory. I