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20132026
most citedGeodesic neighborhoods in unitary orbits of self-adjoint operators of K+C

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math.FA2013

Best approximation by diagonal compact operators

Tamara Bottazzi, Alejandro Varela

We study the existence and characterization properties of compact Hermitian operators C on a separable Hilbert space H such that ||C|| is less or equal than || C + D ||, for all D…