I am Udaya Angammana, working as a Lecturer at the department of Mathematics, Faculty of Natural Sciences, OUSL. I have completed my B. Sc.(Hon) Degree in Mathematics with second class upper division from Peradeniya University, Sri Lanka. I have completed my Msc at the University of Sri Jayawarddanapura.I have started my academic career as a Lecturer at the Department of Mathematics, Faculty of Natural Sciences, OUSL from 1994 to day.