Posinormal factorable matrices with a constant main diagonal

• H. C. Rhaly Jr ^[1] ; B. E. Rhoades ^[2]
  1. [1] Murray State University

     Murray State University

     Estados Unidos

     
  2. [2] Indiana University, USA
• Localización: Revista de la Unión Matemática Argentina, ISSN 0041-6932, ISSN-e 1669-9637, Vol. 55, Nº. 1, 2014, págs. 19-24
• Idioma: inglés
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• Resumen

  • Sufficient conditions are found for a posinormal factorable matrix with a constant main diagonal to be hyponormal. Those conditions are satisfied by some Toeplitz matrices, and a non-Toeplitz example is also presented. Along the way, a more general result is also obtained.