On the rho invariant for manifolds with boundary.
-theory and Toeplitz -algebras a survey
Some aspects of the De Rham complex on non-compact manifolds
Essential self-adjointness of symmetric linear relations associated to first order systems
The purpose of this note is to present several criteria for essential self-adjointness. The method is based on ideas due to Shubin. This note is divided into two parts. The first part deals with symmetric first order systems on the line in the most general setting. Such a symmetric first order system of differential equations gives rise naturally to a symmetric linear relation in a Hilbert space. In this case even regularity is nontrivial. We will announce a regularity result and discuss criteria...
Quantum gravity: unification of principles and interactions, and promises of spectral geometry.
On the spectral geometry of algebraic curves.
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