Abstract
It is proved that the fixed point submonoid and the periodic point submonoid of a trace monoid endomorphism are always finitely generated. If the dependence alphabet is a transitive forest, it is proved that the set of regular fixed points of the (Scott) continuous extension of an endomorphism to real traces is Ω-rational for every endomorphism if and only if the monoid is a free product of free commutative monoids.
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References
Aalbersberg, I.J., Hoogeboom, H.J.: Characterizations of the decidability of some problems for regular trace languages. Math. Syst. Theory 22, 1–19 (1989)
Berstel, J.: Transductions and Context-Free Languages. Teubner, Stuttgart (1979)
Bonizzoni, P., Mauri, G., Pighizzini, G.: About infinite traces. In: Diekert, V. (ed.) Proceedings of the ASMICS Workshop on Partially Commutative Monoids, pp. 1–10 (1990). Technische Universität München. Tech. Rep. TUM-I 9002
Cartier, P., Foata, D.: Problèmes Combinatoires de Commutation et Réarrangements. Lecture Notes in Mathematics, vol. 85. Springer, Berlin (1969)
Cassaigne, J., Silva, P.V.: Infinite periodic points of endomorphisms over special confluent rewriting systems. Ann. Inst. Fourier 59(2), 769–810 (2009)
Davey, B.A., Priestley, H.A.: Introduction to Lattices and Order. Cambridge Mathematical Textbooks. Cambridge University Press, Cambridge (1991)
Dickson, L.E.: Finiteness of the odd perfect and primitive abundant numbers with n distinct prime factors. Am. J. Math. 35(4), 413–422 (1913)
Diekert, V.: Combinatorics on Traces. Lecture Notes in Computer Science, vol. 454. Springer, Berlin (1990)
Diekert, V., Rozenberg, G. (eds.): The Book of Traces. World Scientific, Singapore (1995)
Gastin, P.: Infinite traces. In: Semantics of Systems of Concurrent Processes, Proceedings of the LITP Spring School on Theoretical Computer Science, La Roche Posay, France. LNCS, vol. 469, pp. 277–308. Springer, Berlin (1990)
Kwiatkowska, M.Z.: A metric for traces. Inf. Process. Lett. 35, 129–135 (1990)
Kwiatkowska, M.Z.: On the domain of traces and sequential composition. In: Proc. International Joint Conference on Theory and Practice of Software Development (TAPSOFT’91), pp. 42–56 (1991)
Lohrey, M., Steinberg, B.: The submonoid and rational subset membership problems for graph groups. J. Algebra 320(2), 728–755 (2008)
Metaftsis, V., Raptis, E.: On the profinite topology of right-angled Artin groups. J. Algebra 320(3), 1174–1181 (2008)
Perrin, D., Pin, J.-E.: Infinite Words: Automata, Semigroups, Logic and games. Pure and Applied Mathematics Series, vol. 141. Elsevier Academic, Amsterdam (2004)
Rodaro, E., Silva, P.V.: Fixed points of endomorphisms of trace monoids. Preprint. CMUP 2012-32. arXiv:1211.4517
Rodaro, E., Silva, P.V., Sykiotis, M.: Fixed points of endomorphisms of graph groups. J. Group Theory 16(4), 573–583 (2013). doi:10.1515/jgt-2012-0047
Silva, P.V.: Fixed points of endomorphisms over special confluent rewriting systems. Monatshefte Math. 161(4), 417–447 (2010)
Silva, P.V.: Fixed points of endomorphisms of certain free products. RAIRO Theor. Inform. Appl. 46, 165–179 (2012)
Silva, P.V.: Fixed points of endomorphisms of virtually free groups. Pac. J. Math. 263(1), 207–240 (2013)
Sims, C.C.: Computation with Finitely Presented Groups. Cambridge University Press, Cambridge (1994)
Sykiotis, M.: Fixed points of symmetric endomorphisms of groups. Int. J. Algebra Comput. 12(5), 737–745 (2002)
Acknowledgements
The authors acknowledge support from the European Regional Development Fund through the programme COMPETE and by the Portuguese Government through the FCT—Fundação para a Ciência e a Tecnologia under the project PEst-C/MAT/UI0144/2011. The first author also acknowledges the support of the FCT project SFRH/BPD/65428/2009.
Both authors are grateful to the anonymous referee by very good advice which contributed to improve the original version.
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Communicated by Jean-Eric Pin.
Dedicated to the memory of John M. Howie.
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Rodaro, E., Silva, P.V. Fixed points of endomorphisms of trace monoids. Semigroup Forum 89, 266–279 (2014). https://doi.org/10.1007/s00233-013-9553-0
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DOI: https://doi.org/10.1007/s00233-013-9553-0