Overview: At the time when increasing numbers of chemists are beingattracted by the fascination of supposedly easy computing andassociated colourful imaging, this book appears as a counterpoint..The first part focuses on fundamental concepts of quantum chemistry,covering MCSCF theory, perturbation treatments, basis setdevelopments, density matrices, wave function instabilities tocorrelation effects, and momentum space theory. .The second part is devoted to more practical studies, ranging from thecharacterisation of exotic interstellar molecules, the accuratedetermination of spectroscopic const
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