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    • On the energy of symmetric matrices and Coulson's integral formula 

      De la Peña, J. A.; Rada, J.
      We dene the outer energy of a real symmetric matrix M for the eigenvalues λ1, …, λn of M and their arithmetic mean λ(M). We discuss the properties of the outer energy in contrast to the inner energy defined as Einn(M) = ...
      Universidad Nacional de Colombia Revistas electrónicas UN Revista Colombiana de Matemáticas.