Titlebook: Advances in Production Management Systems; International IFIP T Jan Olhager,Fredrik Persson Conference proceedings 2007 IFIP International

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The Action Principles in Mechanics,.. , ., are points in .-dimensional configuration space. Thus .(.) describes the motion of the system, and . determines its velocity along the path in configuration space. The endpoints of the trajectory are given by .(.) = ., and .(.) = ..