+The **Euler-Lagrange equation** is a profound differential equation central to the [Calculus](/wiki/calculus) of variations. It elegantly describes the optimal [Path](/wiki/path) a system takes, minimizing or maximizing a functional, often representing energy or action.
+## See also
+- [Lagrangian](/wiki/lagrangian)
+- [Variations](/wiki/variations)
+- [Mechanics](/wiki/mechanics)
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