most citedCharacteristic functions for multicontractions and automorphisms of the unit ball

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math.FA2007

The Horn conjecture for compact selfadjoint operators

H. Bercovici, W. S. Li, D. Timotin

We determine the possible eigenvalues of compact selfadjoint operators A,B,C... with the property that A=B+C+... When all these operators are positive, the eigenvalues were known t…