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Titlebook: Symmetry and Combinatorial Enumeration in Chemistry; Shinsaku Fujita Textbook 1991 Springer-Verlag Berlin Heidelberg 1991 Cycle index.Grup

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书目名称Symmetry and Combinatorial Enumeration in Chemistry
编辑Shinsaku Fujita
视频video
图书封面Titlebook: Symmetry and Combinatorial Enumeration in Chemistry;  Shinsaku Fujita Textbook 1991 Springer-Verlag Berlin Heidelberg 1991 Cycle index.Grup
描述This book is written to introduce a new approach to stereochemical problems and to combinatorial enumerations in chemistry. This approach is based on group the­ ory, but different from conventional ways adopted by most textbooks on chemical group theory. The difference sterns from their starting points: conjugate subgroups and conjugacy classes. The conventional textbooks deal with linear representations and character ta­ bles of point groups. This fact implies that they lay stress on conjugacy classesj in fact, such group characters are determined for the respective conjugacy classes. This approach is versatile, since conjugacy classes can be easily obtained by ex­ amining every element of a group. It is unnecessary to know the group-subgroup relationship of the group, which is not always easy to obtain. The same situa­ tion is true for chemical enumerations, though these are founded on permutation groups. Thus, the P6lya-Redfield theorem (1935 and 1927) uses a cycle index that is composed of terms associated with conjugacy classes.
出版日期Textbook 1991
关键词Cycle index; Gruppentheorie; Lattice; Permutation; Polya; Stereochemie; Topicity; chemistry; chirality; class
版次1
doihttps://doi.org/10.1007/978-3-642-76696-1
isbn_softcover978-3-540-54126-4
isbn_ebook978-3-642-76696-1
copyrightSpringer-Verlag Berlin Heidelberg 1991
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978-3-540-54126-4Springer-Verlag Berlin Heidelberg 1991
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Introduction,Group theory is now an essential tool for chemists. Thus, there have appeared a vast number of pedagogical articles on its applications to chemistry. . In addition, we can enrich our knowledge by means of excellent textbooks on this topic..
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Permutation Groups,Consider a set .. A one-to-one mapping from Δ to Δ is called a .. The number . is called the . of the permutation. Since we here take accout only of such mappings, the elements of Δ may be any objectives. For simplicity’s sake, we consider a set of positive integers, Δ = {1,2,3,4}.
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Coset Representations and Orbits,Let . be a subgroup of a group . of finite order. Then we have a (right) coset decomposition:.where ... (identity). Let us consider a set of the cosets,
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New Cycle Index,In Chapter 15, we have discussed an application of unit subduced cycle indices (USCIs) to enumeration of compounds, which is based on a new type of generating functions. In a continuation of the work, the present chapter deals with the relationship between USCIs and Pólya’s cycle indices.
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