On the Simple Constrained-Search Reformulation of the Hohenberg-Kohn Theorem to Include Degeneracies and More (1964-1979)

The constrained-search reformulation provides a transparent proof of the Hohenberg-Kohn theorem, while extending it to include degeneracies, solving the w-representability problem, and more. This proof, as first presented at the 1979 Sanibel meeting, is reviewed within the context of a brief historical perspective and my interactions at that meeting. (C) 2010 Wiley Periodicals, Inc. Int J Quantum Chem 110: 3140-3144, 2010