International Journal of Mathematics and Mathematical Sciences 
Volume 28 (2001), Issue 4, Pages 189-200
doi:10.1155/S016117120100686X

Matrix transformations of starshaped sequences

Chikkanna R. Selvaraj and Suguna Selvaraj

 Penn State University, Shenango Campus, 147, Shenango Avenue, Sharon 16146, PA, USA
Received 1 March 2001

Abstract

We deal with matrix transformations preserving the starshape of sequences. The main result gives the necessary and sufficient conditions for a lower triangular matrix A to preserve the starshape of sequences. Also, we discuss the nature of the mappings of starshaped sequences by some classical matrices.