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math.OA2019
Fredholm conditions for invariant operators: finite abelian groups and boundary value problems
Alexandre Baldare, Rémi Côme, Matthias Lesch +1
We answer the question of when an invariant pseudodifferential operator is Fredholm on a fixed, given isotypical component. More precisely, let be a compact group acting on a s…
math.KT2019
The KO-valued spectral flow for skew-adjoint Fredholm operators
Chris Bourne, Alan L. Carey, Matthias Lesch +1
In this article we give a comprehensive treatment of a `Clifford module flow' along paths in the skew-adjoint Fredholm operators on a real Hilbert space that takes values in KO${}_…