Spectral Invariants of Operators of Dirac Type on Partitioned Manifolds

Details Spectral Invariants of Operators of Dirac Type on Partitioned Manifolds Spectral Invariants of Operators of Dirac Type on Partitioned Manifolds

2003-04-15

arxiv.org/abs/math/0304214v1

Mathematics

Analysis of PDEs

131 pages, 9 figures

Scientific paper

We review the concepts of the index of a Fredholm operator, the spectral flow of a curve of self-adjoint Fredholm operators, the Maslov index of a curve of Lagrangian subspaces in symplectic Hilbert space, and the eta invariant of operators of Dirac type on closed manifolds and manifolds with boundary. We emphasize various (occasionally overlooked) aspects of rigorous definitions and explain the quite different stability properties. Moreover, we utilize the heat equation approach in various settings and show how these topological and spectral invariants are mutually related in the study of additivity and nonadditivity properties on partitioned manifolds.

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