+A Lagrangian is a key function in physics, often expressed as kinetic energy minus potential energy. It elegantly describes a system's dynamics, allowing the determination of its path through the [Principle of Least Action](/wiki/principle-of-least-action) and [Euler-Lagrange equations](/wiki/euler-lagrange).
+## See also
+- [Hamiltonian](/wiki/hamiltonian)
+- [Classical Mechanics](/wiki/classical-mechanics)
+- [Calculus of Variations](/wiki/calculus-of-variations)
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