Summary of the atomic variation principle

The operational statement of this principle is the atomic variational principle [Pg.402]

For example, F = eN = slN, where N is the total number of electrons in the system, generates a simple infinitesimal transformation, which leaves the Lagrangian 2] invariant. In addition, since is a constant of the motion for the total system, [i , N] = 0. However, the time rate of change of the average electronic population of an atom, N( l), is not zero in general and the equation of continuity governing the time evolution of Al( 2) is obtained directly from the equivalent statement of the atomic variational principle, eqn (8.149), as [Pg.402]

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