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20022021
most citedSpectra of self-adjoint extensions and applications to solvable Schroedinger operators

195 citations

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math-ph2004★ 15 cited

On-diagonal singularities of the Green functions for Schroedinger operators

Jochen Bruening, Vladimir Geyler, Konstantin Pankrashkin

We investigate the behavior of the Green functions of Schroedinger operators near the diagonal. The only non-trivial cases, where the on-diagonal singularities are non-zero and do…