An operator-algebraic framework is constructed to recover essential spectrum and topological invariants of discrete-system interfaces from the bulk systems at spatial infinity using Hilbert C*-modules.
Blackadar.K-theory for operator algebras
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Interfaces of discrete systems - spectral and index properties
An operator-algebraic framework is constructed to recover essential spectrum and topological invariants of discrete-system interfaces from the bulk systems at spatial infinity using Hilbert C*-modules.