Journal of Inequalities and Applications
Volume 2006 (2006), Article ID 74171, 8 pages

Classes of elliptic matrices

Antonio Tarsia

Dipartimento di Matematica “L. Tonelli”, Università di Pisa, Largo Bruno Pontecorvo 5, Pisa 56127, Italy

Received 12 December 2005; Revised 20 February 2006; Accepted 21 February 2006

Copyright © 2006 Antonio Tarsia. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The equivalence between some conditions concerning elliptic matrices is shown, namely, the Cordes condition, a generalized form of Campanato's condition, and a generalized form of a condition of Buică.