The purpose of this serial publication is to try to present a survey of the current development of quantum chemistry as it is seen by a number of the internationally leading research workers in various countries. The authors have been invited to give their personal points of view of the subject freely and without severe space limitations. No attempts have been made to avoid overlap-on the contrary, it has seemed desirable to have certain important research areas reviewed from different points of view.
a new format involving cameraready manuscripts is being used from Volume 20. A special announcement about the new format follows.
The author's contributions give an interesting picture of part of the current state of art of the quantum theory of matter: from computational methods of optimizing the electronic energy and molecular conformations, over coupled-cluster expansion methods for the study of the open-shell correlation problem and the calculation of lifetimes of metastable states by means of the method of complex scaling, to a survey of the current state of surface structural chemistry.