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In chemistry, concerned with the electronic and geometric structure of molecules as well as elementary chemical reactions, i.e. rearrangements in these structures, the permutation group has its relevance, since with its representations the effects and consequences of exchanging indistin guishable particles, electrons and identical nuclei, can be systematized and classified. This may be exemplified by a brief survey of the lectures presented, which may also serve as a first orientation· to the articles of this volume. In the first two contributions by A. Kerber and J.G. Nourse, the permutation group is used in the counting and systemtaic generation of stereoisomers aiding in the elucidation of possible molecular structures. The dynamics of stereochemistry is considered in the next article by J.G.  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Sebastiana Nervegna identifies the Greek tragedies that formed the ancient theatrical repertoire, assesses how actors contributed to their survival and considers how public audiences continued to enjoy the theatrical masterpieces of Classical Athens. This is the first work entirely dedicated to the circulation of Greek tragedies among the larger public throughout antiquity.  Free Download The Peptide Therapy & Protocols Bible: Ultimate Guide to BPC-157, TB-500 & Essential Peptides | Evidence-Based Handbook for Weight Loss, Muscle Growth, Anti-Aging & Performance Optimization by Alexander Z. 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