From the contents: The kind and personal influence of Per-Olov Lowdin (J. Karle). - P.-O. Lowdin and the quantum mechanics of molecules (R.G. Woolley, B.T. Sutcliffe). - Symmetry breaking in the independent particle model (J.L. Stuber, J. Paldus). - The Hueckel-Hubbard Hamiltonian and its Gel'fand basis F.A. Matsen). - Different orbitals for different spins, Lowdin's idea (R. Pauncz). - The Pauli exclusive principle, spin-statistics connection, and permutation symmetry of many-particle wave functions (I.G. Kaplan). - The length and breadth of Lowdin-orthogonalizations (V. Srivastava). -...

This volume contains nine contributions, from leading scientists, which embrace the fundamentals of various aspects of the conceptual development of quantum chemistry. Topics dealt with include the behaviour of molecules in magnetic fields, the long-standing problem of the decoupling of nuclear from electron motion in molecules, the status of density functional theory, and the string model of chemical reactions.

I would like to present to a wide circle of the readers working in quantum chem istry and solid-state physics, as, .ell as in other fields of many-body physics and its interfaces, this book deyoted to density functional theory written by my colleagues Eugene S. Kryachko and Eduardo Y. Ludena. Their ways to this theory are rather different although basically both of them are quantum chemical. Eugene S. Kryachko came to energy density functional theory from the theory of reduced density matrices, and Eduardo '. Ludena dewloped earlier the concept of loges in quantum chemistry. Neyertheless,...