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Principle of Least Action was orginally formulated by Pierre Louis Maupertuis, who believe that nature must always operate in the most efficient way possible, so all laws of nature should be described as the minimization of a certain quantity.  Pierre Louis Maupertuis considers the Principle of Least Action as a proof that God exists.

Principle of Least Action was orginally formulated by Pierre Louis Maupertuis, who believe that nature must always operate in the most efficient way possible, so all laws of nature should be described as the minimization of a certain quantity.  Pierre Louis Maupertuis considers the Principle of Least Action as a proof that God exists.

In classical mechanics, the principle of least action states that the motion of a particle along some path always minimize the difference between its kinetic energy and its potential energy.  Mathematically, the motion of a particle always minimizes the action functional.

In classical mechanics, the Least Action Principle states that the motion of a particle along some path always minimize the difference between its kinetic energy and its potential energy.  Mathematically, the motion of a particle always minimizes the action functional.

In [[General Relativity]], the Least Action Principle states that the motion of a particle on a surface M must be a geodesic of M, so it must minimize the geodesic functional.

In [[General Relativity]], the Least Action Principle states that the motion of a particle on a surface M must be a geodesic of M, so it must minimize the geodesic functional.