Advances in Difference Equations
Volume 2006 (2006), Article ID 92923, 18 pages

Oscillatory mixed difference systems

José M. Ferreira1 and Sandra Pinelas2

1Departamento de Matemática, Instituto Superior Técnico, Avenida Rovisco Pais, Lisboa 1049-001, Portugal
2Departamento de Matemática, Universidade dos Açores, Rua Mãe de Deus, Ponta Delgada 9500-321, Portugal

Received 2 November 2005; Accepted 21 February 2006

Copyright © 2006 José M. Ferreira and Sandra Pinelas. 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 aim of this paper is to discuss the oscillatory behavior of difference systems of mixed type. Several criteria for oscillations are obtained. Particular results are included in regard to scalar equations.