Please use this identifier to cite or link to this item: http://cmuir.cmu.ac.th/jspui/handle/6653943832/58807
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dc.contributor.authorBernd Billhardten_US
dc.contributor.authorJintana Sanwongen_US
dc.contributor.authorWorachead Sommaneeen_US
dc.date.accessioned2018-09-05T04:32:50Z-
dc.date.available2018-09-05T04:32:50Z-
dc.date.issued2018-04-27en_US
dc.identifier.issn00371912en_US
dc.identifier.other2-s2.0-85046012547en_US
dc.identifier.other10.1007/s00233-018-9933-6en_US
dc.identifier.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85046012547&origin=inwarden_US
dc.identifier.urihttp://cmuir.cmu.ac.th/jspui/handle/6653943832/58807-
dc.description.abstract© 2018 Springer Science+Business Media, LLC, part of Springer Nature In a paper published in 1994, Umar defined an interesting class of transformation semigroups which naturally generalizes the Vagner one-point completion of the symmetric inverse semigroup. In this paper we prove some isomorphism theorems for finite such semigroups and compute their ranks. Moreover, we determine all maximal inverse subsemigroups of an arbitrary transformation semigroup of this type which is not inverse.en_US
dc.subjectMathematicsen_US
dc.titleSome properties of Umar semigroups: isomorphism theorems, ranks and maximal inverse subsemigroupsen_US
dc.typeJournalen_US
article.title.sourcetitleSemigroup Forumen_US
article.stream.affiliationsUniversitat Kasselen_US
article.stream.affiliationsChiang Mai Universityen_US
article.stream.affiliationsChiang Mai Rajabhat Universityen_US
Appears in Collections:CMUL: Journal Articles

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