期刊名称：International Journal of Mathematics and Mathematical Sciences
印刷版ISSN：0161-1712
电子版ISSN：1687-0425
出版年度：2001
卷号：28
DOI：10.1155/S016117120100686X
出版社：Hindawi Publishing Corporation
摘要：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.
