On the Existence of Wave Operators for Dirac Operators.
Klaus-Jürgen Eckardt (1973/74)
Manuscripta mathematica
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Displaying similar documents to “Some topological properties preserved by nearness between operators and applications to P.D.E.”
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The purpose of this work is to give a topological condition for the usual product of two closed operators acting in a Hilbert space to be closed.