TY - BOOK ID - 50551403 TI - Methods of intermediate problems for eigenvalues : theory and ramifications AU - Weinstein, Alexander. AU - Stenger, William. PY - 1972 VL - 89 SN - 1282702882 9786612702884 0080955983 9780080955988 0127424504 9780127424507 9781282702882 6612702885 PB - Burlington, Mass. : Academic Press, DB - UniCat KW - Nonlinear systems KW - Mathematical models. KW - Systems, Nonlinear KW - System theory KW - Calculus of variations. KW - Eigenvalues. KW - Calculus of variations KW - Eigenvalues UR - http://www.unicat.be/uniCat?func=search&query=sysid:50551403 AB - In this book, we study theoretical and practical aspects of computing methods for mathematical modelling of nonlinear systems. A number of computing techniques are considered, such as methods of operator approximation with any given accuracy; operator interpolation techniques including a non-Lagrange interpolation; methods of system representation subject to constraints associated with concepts of causality, memory and stationarity; methods of system representation with an accuracy that is the best within a given class of models; methods of covariance matrix estimation;methods for low-rank ER -