TY - BOOK ID - 77919522 TI - Spectral theory of block operator matrices and applications PY - 2008 SN - 1848161123 9781848161122 9781860947681 1860947689 PB - London Singapore Hackensack, NJ Imperial College Press Distributed by World Scientific Pub. DB - UniCat KW - Operator theory. KW - Matrices. KW - Spectral theory (Mathematics) KW - Functional analysis KW - Hilbert space KW - Measure theory KW - Transformations (Mathematics) KW - Algebra, Matrix KW - Cracovians (Mathematics) KW - Matrix algebra KW - Matrixes (Algebra) KW - Algebra, Abstract KW - Algebra, Universal UR - https://www.unicat.be/uniCat?func=search&query=sysid:77919522 AB - This book presents a wide panorama of methods to investigate the spectral properties of block operator matrices. Particular emphasis is placed on classes of block operator matrices to which standard operator theoretical methods do not readily apply: non-self-adjoint block operator matrices, block operator matrices with unbounded entries, non-semibounded block operator matrices, and classes of block operator matrices arising in mathematical physics.The main topics include: localization of the spectrum by means of new concepts of numerical range; investigation of the essential spectrum; variation ER -