Essential spectrum due to singularity
Research output: Contribution to journal › Article
It is proven that the essential spectrum of any self-adjoint operator associated with the matrix differential expression [GRAPHICS] consists of two branches. One of these branches (called regularity spectrum) can be obtained by approximating the operator by regular operators (with coefficients which are bounded near the origin), the second branch (called singularity spectrum) appears due to singularity of the coefficients.
|Research areas and keywords||
Subject classification (UKÄ) – MANDATORY
|Journal||Journal of Nonlinear Mathematical Physics|
|Publication status||Published - 2003|