Derivation of the Euler-Lagrange Equation | Calculus of Variations
7:50
YouTubeFaculty of Khan
Derivation of the Euler-Lagrange Equation | Calculus of Variations
In this video, I derive/prove the Euler-Lagrange Equation used to find the function y(x) which makes a functional stationary (i.e. the extremal). Euler-Lagrange comes up in a lot of places, including Mechanics and Relativity. The derivation is performed by introducing a variation in the extremal via a parameter epsilon, and setting the ...
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