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An Unconventional Orthonormal Basis Provides an Unexpected Counterexample

by Giuseppe Marino (Università della Calabria, Italy) and Paolamaria Pietramala (Università della Calabria, Italy)

This article originally appeared in:
Mathematics Magazine
December, 1993

Subject classification(s): Analysis | Functional Analysis | Hilbert Spaces
Applicable Course(s): 4.12 Advanced Math for Engineering & Physics

Construction of a counterexample of concerning compact self-adjoint operators from the existence of a special orthonormal basis in Hilbert Space

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