An introduction to the Calculus of Variations and the derivation of the Euler-Lagrange Equation. Download notes for THIS video HERE: https://bit.ly/3kCy17R Download notes for my other videos: https://bit.ly/37OH9lX INTEGRATION BY PARTS: https://www.dropbox.com/s/f5wlzbqhzqrtnoe/IntegrationByParts.pdf 0:00 An Historical Background 3:47 Path Minimization Problems 10:25 Deriving the Euler-Lagrange Equation