An application of Lie groupoids to a rigidity problem of 2-step nilmanifolds

Hamid-Reza Fanaï; Atefeh Hasan-Zadeh

Mathematica Bohemica (2019)

  • Volume: 144, Issue: 2, page 149-160
  • ISSN: 0862-7959

Abstract

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We study a problem of isometric compact 2-step nilmanifolds M / Γ using some information on their geodesic flows, where M is a simply connected 2-step nilpotent Lie group with a left invariant metric and Γ is a cocompact discrete subgroup of isometries of M . Among various works concerning this problem, we consider the algebraic aspect of it. In fact, isometry groups of simply connected Riemannian manifolds can be characterized in a purely algebraic way, namely by normalizers. So, suitable factorization of normalizers and expression of a vector bundle as an associated fiber bundle to a principal bundle, lead us to a general framework, namely groupoids. In this way, drawing upon advanced ingredients of Lie groupoids, normal subgroupoid systems and other notions, not only an answer in some sense to our rigidity problem has been given, but also the dependence between normalizers, automorphisms and especially almost inner automorphisms, has been clarified.

How to cite

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Fanaï, Hamid-Reza, and Hasan-Zadeh, Atefeh. "An application of Lie groupoids to a rigidity problem of 2-step nilmanifolds." Mathematica Bohemica 144.2 (2019): 149-160. <http://eudml.org/doc/294662>.

@article{Fanaï2019,
abstract = {We study a problem of isometric compact 2-step nilmanifolds $\{M\}/\Gamma $ using some information on their geodesic flows, where $M$ is a simply connected 2-step nilpotent Lie group with a left invariant metric and $\Gamma $ is a cocompact discrete subgroup of isometries of $M$. Among various works concerning this problem, we consider the algebraic aspect of it. In fact, isometry groups of simply connected Riemannian manifolds can be characterized in a purely algebraic way, namely by normalizers. So, suitable factorization of normalizers and expression of a vector bundle as an associated fiber bundle to a principal bundle, lead us to a general framework, namely groupoids. In this way, drawing upon advanced ingredients of Lie groupoids, normal subgroupoid systems and other notions, not only an answer in some sense to our rigidity problem has been given, but also the dependence between normalizers, automorphisms and especially almost inner automorphisms, has been clarified.},
author = {Fanaï, Hamid-Reza, Hasan-Zadeh, Atefeh},
journal = {Mathematica Bohemica},
keywords = {nilpotent Lie group; isometric nilmanifolds; normalizer; Lie algebroid; normal subgroupoid system; inner automorphism},
language = {eng},
number = {2},
pages = {149-160},
publisher = {Institute of Mathematics, Academy of Sciences of the Czech Republic},
title = {An application of Lie groupoids to a rigidity problem of 2-step nilmanifolds},
url = {http://eudml.org/doc/294662},
volume = {144},
year = {2019},
}

TY - JOUR
AU - Fanaï, Hamid-Reza
AU - Hasan-Zadeh, Atefeh
TI - An application of Lie groupoids to a rigidity problem of 2-step nilmanifolds
JO - Mathematica Bohemica
PY - 2019
PB - Institute of Mathematics, Academy of Sciences of the Czech Republic
VL - 144
IS - 2
SP - 149
EP - 160
AB - We study a problem of isometric compact 2-step nilmanifolds ${M}/\Gamma $ using some information on their geodesic flows, where $M$ is a simply connected 2-step nilpotent Lie group with a left invariant metric and $\Gamma $ is a cocompact discrete subgroup of isometries of $M$. Among various works concerning this problem, we consider the algebraic aspect of it. In fact, isometry groups of simply connected Riemannian manifolds can be characterized in a purely algebraic way, namely by normalizers. So, suitable factorization of normalizers and expression of a vector bundle as an associated fiber bundle to a principal bundle, lead us to a general framework, namely groupoids. In this way, drawing upon advanced ingredients of Lie groupoids, normal subgroupoid systems and other notions, not only an answer in some sense to our rigidity problem has been given, but also the dependence between normalizers, automorphisms and especially almost inner automorphisms, has been clarified.
LA - eng
KW - nilpotent Lie group; isometric nilmanifolds; normalizer; Lie algebroid; normal subgroupoid system; inner automorphism
UR - http://eudml.org/doc/294662
ER -

References

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  1. Baer, R., 10.2307/2371564, Am. J. Math. 59 (1937), 99-117. (1937) Zbl0016.01404MR1507222DOI10.2307/2371564
  2. Besson, G., Courtois, G., Gallot, S., 10.1007/BF01897050, Geom. Func. Anal. 5 (1995), 731-799 French. (1995) Zbl0851.53032MR1354289DOI10.1007/BF01897050
  3. Besson, G., Courtois, G., Gallot, S., 10.1017/S0143385700009019, Ergodic Theory Dyn. Syst. 16 (1996), 623-649. (1996) Zbl0887.58030MR1406425DOI10.1017/S0143385700009019
  4. Châtelet, A., Les groupes abéliens finis et les modules de points entiers, Bibliothèque universitaire. Travaux et mémoires de l’Université de Lille. Nouv. série II, 3. Gauthier-Villars, Lille (1925), French 9999JFM99999 51.0115.02. (1925) 
  5. Croke, C., 10.1007/BF02566599, Comment. Math. Helvet. 65 (1990), 150-169. (1990) Zbl0704.53035MR1036134DOI10.1007/BF02566599
  6. Croke, C., Eberlein, P., Kleiner, B., 10.1016/0040-9383(95)00031-3, Topology 35 (1996), 273-286. (1996) Zbl0859.53024MR1380497DOI10.1016/0040-9383(95)00031-3
  7. Duistermaat, J. J., Kolk, J. A. C., 10.1007/978-3-642-56936-4, Universitext. Springer, Berlin (2000). (2000) Zbl0955.22001MR1738431DOI10.1007/978-3-642-56936-4
  8. Eberlein, P., 10.24033/asens.1702, Ann. Sci. Éc. Norm. Supér. (4) 27 (1994), 611-660. (1994) Zbl0820.53047MR1296558DOI10.24033/asens.1702
  9. Fana{ï}, H.-R., Hasan-Zadeh, A., A symplectic rigidity problem for 2 -step nilmanifolds, Houston J. Math. 43 (2017), 363-374. (2017) Zbl06833112MR3690121
  10. Gabai, D., 10.1090/S0273-0979-1994-00523-3, Bull. Am. Math. Soc., New Ser. 31 (1994), 228-232. (1994) Zbl0817.57015MR1261238DOI10.1090/S0273-0979-1994-00523-3
  11. Gordon, C. S., Mao, Y., 10.1307/mmj/1030132293, Mich. Math. J. 45 (1998), 451-481. (1998) Zbl0976.53090MR1653247DOI10.1307/mmj/1030132293
  12. Gordon, C. S., Mao, Y., Schueth, D., 10.1016/S0012-9593(97)89927-2, Ann. Sci. Éc. Norm. Supér. (4) 30 (1998), 417-427. (1998) Zbl0897.53033MR1456241DOI10.1016/S0012-9593(97)89927-2
  13. Gordon, C. S., Wilson, E. N., 10.4310/jdg/1214438431, J. Differ. Geom. 19 (1984), 241-256. (1984) Zbl0523.58043MR0739790DOI10.4310/jdg/1214438431
  14. Hallett, J. T., Hirsch, K. A., 10.1016/0021-8693(65)90010-4, J. Algebra 2 (1965), 287-298. (1965) Zbl0132.27301MR0183789DOI10.1016/0021-8693(65)90010-4
  15. Hallett, J. T., Hirsch, K. A., 10.1515/crll.1969.239-240.32, J. Reine Angew. Math. 239-240 (1969), 32-46. (1969) Zbl0186.03901MR0257205DOI10.1515/crll.1969.239-240.32
  16. Hulpke, A., Normalizer calculation using automorphisms, Computational Group Theory and the Theory of Groups. AMS special session On Computational Group Theory, Davidson, USA, 2007 Contemporary Mathematics 470. AMS, Providence (2008), 105-114 L.-C. Kappe et al. (2008) Zbl1184.20002MR2478417
  17. Mackenzie, K. C. H., 10.1017/CBO9781107325883, London Mathematical Society Lecture Note Series 213. Cambridge University Press, Cambridge (2005). (2005) Zbl1078.58011MR2157566DOI10.1017/CBO9781107325883
  18. Mann, K., Homomorphisms between diffeomorphism groups, Avaible at https://arxiv.org/abs/1206.1196v1 (2012). (2012) MR3294298
  19. Mostow, G. D., 10.1515/9781400881833, Annals of Mathematics Studies. No. 78. Princeton University Press, Princeton (1973). (1973) Zbl0265.53039MR0385004DOI10.1515/9781400881833
  20. O'Neill, B., Semi Riemannian Geometry. With Applications to Relativity, Pure and Applied Mathematics 103. Academic Press, London (1983). (1983) Zbl0531.53051MR0719023
  21. Otal, J. P., 10.2307/1971511, Ann. Math. (2) 131 (1990), 151-162 French. (1990) Zbl0699.58018MR1038361DOI10.2307/1971511
  22. Raghunathan, M. S., Discrete Subgroups of Lie Groups, Ergebnisse der Mathematik und ihrer Grenzgebiete. Band 68. Springer, Berlin (1972). (1972) Zbl0254.22005MR0507234

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