Generalized Fredholm properties for invariant pseudodifferential operators

Details Generalized Fredholm properties for invariant pseudodifferential operators Generalized Fredholm properties for invariant pseudodifferential operators

2011-01-24

arxiv.org/abs/1101.4614v3

Mathematics

Analysis of PDEs

19 pages, added refs, extended some exposition

Scientific paper

We define classes of pseudodifferential operators on $G$-bundles with compact base and give a generalized $L^2$ Fredholm theory for invariant operators in these classes in terms of von Neumann's $G$-dimension. We combine this formalism with a generalized Paley-Wiener theorem, valid for bundles with unimodular structure groups, to provide solvability criteria for invariant operators. This formalism also gives a basis for a $G$-index for these operators. We also define and describe a transversal dimension and its corresponding Fredholm theory in terms of anisotropic Sobolev estimates, valid also for similar bundles with nonunimodular structure group.

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