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In abstract algebra, in semigroup theory, a Schutzenberger group is a certain group associated with a Green H-class of a semigroup. The Schutzenberger groups associated with different H-classes are different. However, the groups associated with two different H-classes contained in the same D-class of a semigroup are isomorphic. Moreover, if the H-class itself were a group, the Schutzenberger group of the H-class would be isomorphic to the H-class. In fact, there are two Schutzenberger groups associated with a given H-class and each is antiisomorphic to the other.

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  • In abstract algebra, in semigroup theory, a Schutzenberger group is a certain group associated with a Green H-class of a semigroup. The Schutzenberger groups associated with different H-classes are different. However, the groups associated with two different H-classes contained in the same D-class of a semigroup are isomorphic. Moreover, if the H-class itself were a group, the Schutzenberger group of the H-class would be isomorphic to the H-class. In fact, there are two Schutzenberger groups associated with a given H-class and each is antiisomorphic to the other. The Schutzenberger group was discovered by Marcel-Paul Schützenberger in 1957 and the terminology was coined by A. H. Clifford. (en)
  • En algèbre générale, et notamment en théorie des demi-groupes, le groupe de Schützenberger est un groupe associé à une -classe, au sens des relations de Green d'un demi-groupe. Les groupes de Schützenberger de deux -classes d'une même -classe sont isomorphes. Si une -classe est un groupe, le groupe de Schützenberger de cette -classe est isomorphe à cette classe. Il y a en fait deux groupes de Schützenberger associés à une -classe donnée; ils sont anti-isomorphes l'un de l'autre. Les groupes de Schützenberger ont été décrits par Marcel-Paul Schützenberger en 1957. Ils ont été nommés ainsi dans le livre de Alfred H. Clifford et Gordon Preston. (fr)
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  • En algèbre générale, et notamment en théorie des demi-groupes, le groupe de Schützenberger est un groupe associé à une -classe, au sens des relations de Green d'un demi-groupe. Les groupes de Schützenberger de deux -classes d'une même -classe sont isomorphes. Si une -classe est un groupe, le groupe de Schützenberger de cette -classe est isomorphe à cette classe. Il y a en fait deux groupes de Schützenberger associés à une -classe donnée; ils sont anti-isomorphes l'un de l'autre. (fr)
  • In abstract algebra, in semigroup theory, a Schutzenberger group is a certain group associated with a Green H-class of a semigroup. The Schutzenberger groups associated with different H-classes are different. However, the groups associated with two different H-classes contained in the same D-class of a semigroup are isomorphic. Moreover, if the H-class itself were a group, the Schutzenberger group of the H-class would be isomorphic to the H-class. In fact, there are two Schutzenberger groups associated with a given H-class and each is antiisomorphic to the other. (en)
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  • Groupe de Schützenberger (fr)
  • Schutzenberger group (en)
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