: Spectral theory of elliptic differential operators, wave scattering by obstacles, Brownian motion and diffusion, and index theory for Dirac operators.
The book you are looking for is titled by Michael E. Taylor . It is the second volume in a three-part series published by Springer as part of the Applied Mathematical Sciences series (Volume 116). Book Overview Partial Differential Equations II: Qualitative ...
This volume builds on the basic theory of linear partial differential equations (PDEs) and covers more advanced analytical tools and topics, including: : Spectral theory of elliptic differential operators, wave
: Pseudodifferential operators, Wiener measure, and the functional analysis of self-adjoint operators. wave scattering by obstacles
: Development of basic concepts centered around curvature. Partial Differential Equations II - Springer Nature