Selected Papers II

Scattering Theory in Euclidean Space.- The Wave Equation in Exterior Domains.- Exponential Decay of Solutions of the Wave Equation in the Exterior of a Star-Shaped Obstacle.- Scattering Theory.- Decaying Modes for the Wave Equation in the Exterior of an Obstacle.- On the Scattering Frequencies of the Laplace Operator for Exterior Domains.- Commentary on Part V.- Scattering Theory for Automorphic Functions.- Translation Representations for the Solution of the Non-Euclidean Wave Equation.- Scattering Theory for Automorphic Functions.- Translation Representations for the Solution of the Non-Euclidean Wave Equation. II.- The Asymptotic Distribution of Lattice Points in Euclidean and Non-Euclidean Spaces.- A Local Paley-Wiener Theorem for the Radon Transform of L 2 Functions in a Non-Euclidean Setting.- Translation Representations for Automorphic Solutions of the Wave Equation in Non-Euclidean Spaces. I.- Translation Representations for Automorphic Solutions of the Wave Equation in Non-Euclidean Spaces. II.- Translation Representations for Automorphic Solutions of the Wave Equation in Non-Euclidean Spaces. III.- Translation Representation for Automorphic Solutions of the Wave Equation in Non-Euclidean Spaces, IV.- Translation Representations for Automorphic Solutions of the Wave Equation in Non-Euclidean Spaces; the Case of Finite Volume.- Commentary on Part VI.- Functional Analysis.- A Stability Theorem for Solutions of Abstract Differential Equations, and Its Application to the Study of the Local Behavior of Solutions of Elliptic Equations.- A Phragmén-Lindelöf Theorem in Harmonic Analysis and Its Application to Some Questions in the Theory of Elliptic Equations.- Translation Invariant Spaces.- The Time Delay Operator and a Related Trace Formula.- The Translation Representation Theorem.- Trace Formulas for the Schroedinger Operator.- Commentary on Part VII.- Analysis.- Approximation of Measure Preserving Transformations.- On the Factorization of Matrix-Valued Functions.- A Short Path to the Shortest Path.- Change of Variables in Multiple Integrals.- Change of Variables in Multiple Integrals II.- Commentary on Part VIII.- Algebra.- On Matrices Whose Real Linear Combinations are Nonsingular.- Correction to "On Matrices Whose Real Linear Combinations are Nonsingular".- On Sums of Squares.- The Multiplicity of Eigenvalues.- On the Discriminant of Real Symmetric Matrices.- Commentary on Part IX.