1. Wave Scattering in 1-D Nonconservative Media -- 2. Resolvent Estimates for Schrรถdinger-type and Maxwell Equations with Applications -- 3. Symmetric Solutions of Ginzburgโ{128}{148}Landau Equations -- 4. Quantum Mechanics and Relativity: Their Unification by Local Time -- 5. On Embedded Eigenvalues of Perturbed Periodic Schrรถdinger Operators -- 6. On Principal Eigenvalues for Indefinite-Weight Elliptic Problems -- 7. Scattering by Obstacles in Acoustic Waveguides -- 8. Recovery of Compactly Supported Spherically Symmetric Potentials from the Phase Shift of the s- Wave -- 9. A Turning Point Problem Arising in Connection with a Limiting Absorption Principle for Schrรถdinger Operators with Generalized Von Neumannโ{128}{148}Wigner Potentials -- 10. Eigenvalue Problems for Semilinear Equations -- 11. Spectral Operators Generated by 3-Dimensional Damped Wave Equation and Applications to Control Theory -- 12. Invertibility of Nonlinear Operators and Parameter Continuation Method -- 13. Sturmโ{128}{148}Liouville Differential Operators with Singularities