Complex sentence: In the action approach, the states of the physical variable are specified at two points, called the initial and final states; the values of the physical variable at all intermediate points may then be determined by minimizing the action.
Split into simpler sentences: In the action approach, the states of the physical variable are specified at two points, called the initial and final states. The values of the physical variable at all intermediate points may then be determined by'minimizing' the action.