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Eta-Invariant of Elliptic Parameter-Dependent Boundary-Value Problems
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Journal Article
Eta-Invariant of Elliptic Parameter-Dependent Boundary-Value Problems
2024
Overview
In this paper, we study the eta-invariant of elliptic parameter-dependent boundary-value problems and its main properties. Using Melrose’s approach, we define the eta-invariant as a regularization of the winding number of the family. In this case, the regularization of the trace requires obtaining the asymptotics of the trace of compositions of invertible parameter-dependent boundaryvalue problems for large values of the parameter. Obtaining the asymptotics uses the apparatus of pseudodifferential boundary-value problems and is based on the reduction of parameter-dependent boundary-value problems to boundary-value problems with no parameter.
Publisher
Springer International Publishing,Springer,Springer Nature B.V
