PanAmerican is devoted to publish high quality peerreviewed research papers that bring a clear and insightful exposition of significant aspects of current research developments in all areas of mathematical sciences. Article intended for publication in PanAmerican should meet high standard of clarity as well as mathematical content. There must be substantial introductory section giving the motivation , background and significance of results. The introductory section should be addressed to a broad spectrum of mathematical audience. Following the statement of results, there should follow complete proofs and applications.