Mr. U. Angammana B.Sc. (Peradeniya), M.Sc. (Sri Jayawardanapura) Department of Mathematics and Computer Science Dept. of mathematics,Faculty of Natural Sciences,The Open University of Sri Lanka, KRC,Polgolla,Kandy. Tel : 0812494495 (161) E-Mail : email@example.com Profile Share this article Add a Comment Cancel replyYou must be logged in to post a comment.