Completeness of Root Functions of Regular Differential Operators
The precise mathematical investigation of various natural phenomena is an old and difficult problem. This book is the first to deal systematically with the general non-selfadjoint problems in mechanics and physics. It deals mainly with bounded domains with smooth boundaries, but also considers elliptic boundary value problems in tube domains, i.e. in non-smooth domains. This volume will be of particular value to those working in differential equations, functional analysis, and equations of mathematical physics.
Table of Contents
Part 1 Auxiliary results: general notions from functional analysis; interpolation of spaces and operators. Part 2 Unbounded polynomial operator pencils: completeness of root vectors of an operator from the class rhop(H); completeness of root vectors of an unbounded operator; n-fold completeness of root vectors of an unbounded polynomial operator pencil; n-fold completeness of root vectors of a system of unbounded polynomial operator pencils; the completeness of root vectors of the system of unbounded linear operator pencils. Part 3 In principal the multipoint problem for ordinary differential equation with polynomial parameter: p-regular functional conditions; coerciveness of principally of multipoint problems for ordinary differential equations with a polynomial parameter; fold completeness of root functions for in principally multipoint problems for ordinary differential equations with a polynomial parameter; completeness of root functions for in principally multipoint problems for ordinary differential equations with a linear parameter. Part 4 Principally elliptic boundary-value problem with a polynomial parameter: principally regular elliptic boundary-value problems with a polynomial parameter; irregular elliptic boundary-value problems for the Laplace equations. Part 5 Differential-operator equations: differential-operator equations on the whole axis; Cauchy problem for parabolic differential-operator equations; boundary-value problems for elliptic differential - operator equations; completeness of elementary solutions of differential-operator equations. Part 6 Partial differential equations: principally initial-boundary value problems for parabolic equations; boundary-value problems for elliptic equations of the 4-th order.