Small-radius tubular structures have attracted considerable attention in the last few years, and are frequently used in different areas such as Mathematical Phy
This book is designed as a concise introduction to the recent achievements on spectral analysis of graphs or networks from the point of view of quantum (or non-
This textbook provides a graduate-level introduction to the spectral theory of linear operators on Banach and Hilbert spaces, guiding readers through key compon
To tailor time series models to a particular physical problem and to follow the working of various techniques for processing and analyzing data, one must unders