Presentations for Subgroups of Monoids
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N. Ruลกkuc
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Article
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1999
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Elsevier Science
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English
โ 116 KB
The main result of this paper gives a presentation for an arbitrary subgroup of a monoid defined by a presentation. It is a modification of the well known Reidemeister-Schreier theorem for groups. Some consequences of this result are explored. It is proved that a regular monoid with finitely many le