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Transactions of the American Mathematical Society

Published by the American Mathematical Society, the Transactions of the American Mathematical Society (TRAN) is devoted to research articles of the highest quality in all areas of pure and applied mathematics.

ISSN 1088-6850 (online) ISSN 0002-9947 (print)

The 2020 MCQ for Transactions of the American Mathematical Society is 1.43.

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On $C^*$-algebras associated to right LCM semigroups
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by Nathan Brownlowe, Nadia S. Larsen and Nicolai Stammeier PDF
Trans. Amer. Math. Soc. 369 (2017), 31-68 Request permission

Abstract:

We initiate the study of the internal structure of $C^*$-algebras associated to a left cancellative semigroup in which any two principal right ideals are either disjoint or intersect in another principal right ideal; these are variously called right LCM semigroups or semigroups that satisfy Clifford’s condition. Our main findings are results about uniqueness of the full semigroup $C^*$-algebra. We build our analysis upon a rich interaction between the group of units of the semigroup and the family of constructible right ideals. As an application we identify algebraic conditions on $S$ under which $C^*(S)$ is purely infinite and simple.
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Additional Information
  • Nathan Brownlowe
  • Affiliation: School of Mathematics and Applied Statistics, University of Wollongong, Wollongong, New South Wales 2522, Australia
  • MR Author ID: 770264
  • Email: nathanb@uow.edu.au
  • Nadia S. Larsen
  • Affiliation: Department of Mathematics, University of Oslo, P. O. Box 1053, Blindern, 0316 Oslo, Norway
  • MR Author ID: 622552
  • Email: nadiasl@math.uio.no
  • Nicolai Stammeier
  • Affiliation: Mathematisches Institut, Westfälischen Wilhelms-Universität Münster, 48149 Münster, Germany
  • Address at time of publication: Department of Mathematics, University of Oslo, P. O. Box 1053, Blindern, 0316 Oslo, Norway
  • MR Author ID: 1110735
  • Email: nicolsta@math.uio.no
  • Received by editor(s): June 29, 2014
  • Received by editor(s) in revised form: November 25, 2014
  • Published electronically: March 9, 2016
  • Additional Notes: Part of this research was carried out while all three authors participated in the workshop “Operator algebras and dynamical systems from number theory” in November 2013 at the Banff International Research Station, Canada. They thank BIRS for its hospitality and excellent working environment. The third author was supported by DFG through SFB $878$ and by ERC through AdG $267079$.
  • © Copyright 2016 American Mathematical Society
  • Journal: Trans. Amer. Math. Soc. 369 (2017), 31-68
  • MSC (2010): Primary 46L05; Secondary 20M10, 20M30, 46L55
  • DOI: https://doi.org/10.1090/tran/6638
  • MathSciNet review: 3557767