Hello, I am Subhajit Pramanick. I and my friend, Sougata Dandapathak, both presented this ppt in our college seminar. It is basically based on the origin of calculus of variation. It consists of several topics like the history of it, the origin of it, who developed it, application of it, advantages and disadvantages etc. The main aim of this presentation is to increase our mathematical as well as physical conception on advanced classical mechanics. We hope you will all enjoy by reading this presentation. Thank you.