Abstract
We define a groupoid from a labelled space and show that it is isomorphic to the tight groupoid arising from an inverse semigroup associated with the labelled space. We then define a local homeomorphism on the tight spectrum that is a generalization of the shift map for graphs, and show that the defined groupoid is isomorphic to the Renault-Deaconu groupoid for this local homeomorphism. Finally, we show that the C*-algebra of this groupoid is isomorphic to the C*-algebra of the labelled space as introduced by Bates and Pask.
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Notes
This is different from Boava et al. (2017a). The authors realized that the original description of \(\mathscr {L}^{\infty }\) was incorrect—for instance, (Boava et al. 2017a, Proposition 4.18) did not hold with \(\mathscr {L}^{\infty }\) as originally described. With this change, all results involving \(\mathscr {L}^{\infty }\) hold.
References
Bates, T., Carlsen, T.M., Pask, D.: \(C^*\)-algebras of labelled graphs III–\(K\)-theory computations. Ergodic Theory Dyn. Syst. 37(2), 337–368 (2017)
Bates, T., Pask, D.: \(C^*\)-algebras of labelled graphs. J. Oper. Theory 57(1), 207–226 (2007)
Bates, T., Pask, D.: \(C^*\)-algebras of labelled graphs. II. Simplicity results. Math. Scand. 104(2), 249–274 (2009)
Boava, G., de Castro, G.G., Mortari, F.de L.: Inverse semigroups associated with labelled spaces and their tight spectra. Semigroup Forum 94(3), 582–609 (2017)
Boava, G., de Castro, G.G., Mortari, FdL: C*-algebras of labelled spaces and their diagonal C*-subalgebras. J. Math. Anal. Appl. 456(1), 69–98 (2017)
Carlsen, T.M.: Cuntz–Pimsner \(C^*\)-algebras associated with subshifts. Int. J. Math. 19(1), 47–70 (2008)
Carlsen, T.M., Matsumoto, K.: Some remarks on the \(C^*\)-algebras associated with subshifts. Math. Scand. 95(1), 145–160 (2004)
Carlsen, T.M., Ortega, E., Pardo, E.: \(C^*\)-algebras associated to Boolean dynamical systems. J. Math. Anal. Appl. 450(1), 727–768 (2017)
Cuntz, J.: Simple \(C^*\)-algebras generated by isometries. Commun. Math. Phys. 57(2), 173–185 (1977)
Cuntz, J., Krieger, W.: A class of \(C^{\ast } \)-algebras and topological Markov chains. Invent. Math. 56(3), 251–268 (1980)
Deaconu, V.: Groupoids associated with endomorphisms. Trans. Am. Math. Soc. 347(5), 1779–1786 (1995)
Exel, R.: Inverse semigroups and combinatorial \(C^\ast \)-algebras. Bull. Braz. Math. Soc. (N.S.) 39(2), 191–313 (2008)
Exel, R., Laca, M.: Cuntz-Krieger algebras for infinite matrices. J. Reine Angew. Math. 512, 119–172 (1999)
Farthing, C., Muhly, P.S., Yeend, T.: Higher-rank graph \(C^*\)-algebras: an inverse semigroup and groupoid approach. Semigroup Forum 71(2), 159–187 (2005)
Kumjian, A., Pask, D., Raeburn, I., Renault, J.: Graphs, groupoids, and Cuntz-Krieger algebras. J. Funct. Anal. 144(2), 505–541 (1997)
Lawson, M.V.: Non-commutative Stone duality: inverse semigroups, topological groupoids and \(C^\ast \)-algebras. Int. J. Algebra Comput. 22(6), 1250058 (2012)
Marrero, A.E., Muhly, P.S.: Groupoid and inverse semigroup presentations of ultragraph \(C^*\)-algebras. Semigroup Forum 77(3), 399–422 (2008)
Paterson, A.L.T.: Groupoids, inverse semigroups, and their operator algebras, volume 170 of Progress in Mathematics. Birkhäuser Boston Inc, Boston (1999)
Paterson, A.L.T.: Graph inverse semigroups, groupoids and their \(C^\ast \)-algebras. J. Oper. Theory 48(3, suppl), 645–662 (2002)
Raeburn, I: Graph algebras, volume 103 of CBMS Regional Conference Series in Mathematics. Published for the Conference Board of the Mathematical Sciences, Washington, DC; by the American Mathematical Society, Providence, RI (2005)
Renault, J.: A groupoid approach to \(C^{\ast } \)-algebras, volume 793 of Lecture Notes in Mathematics. Springer, Berlin (1980)
Renault, J: Cuntz-like algebras. In Operator theoretical methods (Timişoara, 1998), pages 371–386. Theta Found., Bucharest (2000)
Stone, M.H.: Postulates for Boolean algebras and generalized boolean algebras. Am. J. Math. 57(4), 703–732 (1935)
Thomsen, K.: Semi-étale groupoids and applications. Ann. Inst. Fourier (Grenoble) 60(3), 759–800 (2010)
Tomforde, M.: A unified approach to Exel-Laca algebras and \(C^\ast \)-algebras associated to graphs. J. Oper. Theory 50(2), 345–368 (2003)
Webster, S.B.G.: The path space of a directed graph. Proc. Am. Math. Soc. 142(1), 213–225 (2014)
Yeend, T.: Groupoid models for the \(C^*\)-algebras of topological higher-rank graphs. J. Oper. Theory 57(1), 95–120 (2007)
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Boava, G., de Castro, G.G. & Mortari, F.d.L. Groupoid Models for the C*-Algebra of Labelled Spaces. Bull Braz Math Soc, New Series 51, 835–861 (2020). https://doi.org/10.1007/s00574-019-00177-6
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DOI: https://doi.org/10.1007/s00574-019-00177-6