Titlebook: Generators and Relations for Discrete Groups; H. S. M. Coxeter,W. O. J. Moser Book 19723rd edition Springer-Verlag Berlin Heidelberg 1972

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https://doi.org/10.1007/978-1-349-02464-3e it invariant. The symmetry operations (including the identity) of any figure clearly form a group: the . of the figure. A completely irregular figure has a symmetry group of order 1. The group of order 2 arises when the figure has bilateral symmetry, or when it is transformed into itself by a half-turn (i.e., rotation through two right angles).

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https://doi.org/10.1007/978-3-662-21946-1Finite; Groups; Permutation; Scope; Visage; computer; finite group; form; group; mutation; reflection; symmetri

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Crisis in the French Labour Movementverted this method into an almost mechanical technique, a useful tool with a wide range of applications. In § 2.1 we apply it to determine an abstract definition for a given finite group. In § 2.4 we use it to find whether a given subgroup of an abstract group is normal. Finally, in § 2.5 we see how

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