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Hausdorff convergence and universal covers
Author(s):
Christina
Sormani;
Guofang
Wei
Journal:
Trans. Amer. Math. Soc.
353
(2001),
3585-3602.
MSC (1991):
Primary 53C20
Posted:
April 26, 2001
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Abstract:
We prove that if is the Gromov-Hausdorff limit of a sequence of compact manifolds, , with a uniform lower bound on Ricci curvature and a uniform upper bound on diameter, then has a universal cover. We then show that, for sufficiently large, the fundamental group of has a surjective homeomorphism onto the group of deck transforms of . Finally, in the non-collapsed case where the have an additional uniform lower bound on volume, we prove that the kernels of these surjective maps are finite with a uniform bound on their cardinality. A number of theorems are also proven concerning the limits of covering spaces and their deck transforms when the are only assumed to be compact length spaces with a uniform upper bound on diameter.
References:
-
- [AbGl]
- U. Abresch, D. Gromoll, On complete manifolds with nonnegative Ricci curvature, J. Amer. Math. Soc. 3 (1990) 355-374. MR 91a:53071
- [An]
- M. Anderson, Short geodesics and gravitational instantons, J. Differential Geom. 31 (1990), 265-275. MR 91b:53040
- [Ca]
- M. Cassorla, Approximating compact inner metric spaces by surfaces, Indiana Univ. Math. J. 41 (1992) 505-513. MR 93i:53042
- [ChCo]
- J. Cheeger, T. Colding, On the structure of spaces with Ricci curvature bounded below I, J. Diff. Geom. 46 (1997) 406-480. MR 98k:53044
- [Co]
- T. Colding, Ricci curvature and volume convergence, Ann. of Math. (2) 145 (1997), no. 3, 477-501. MR 98d:53050
- [Gr]
- M. Gromov, Metric structures for Riemannian and non-Riemannian spaces, Progress in Math. 152, Birkhäuser, 1999.MR 2000d:53065
- [Ma]
- W. Massey, A basic course in algebraic topology, GTM 127, Springer-Verlag, 1991. MR 92e:55001
- [Me]
- X. Menguy, Examples with bounded diameter growth and infinite topological type. Duke Math. J. 102 (2000), no. 3, 403-412. MR 2001e:53041
- [Ot]
- Y. Otsu, On manifolds of positive Ricci curvature with large diameter, Math. Z. 206 (1991) 255-264. MR 91m:53033
- [Pl]
- G. Perelman, A. D. Aleksandrov spaces with curvatures bounded below. Part II, preprint.
- [Pe1]
- P. Petersen, The fundamental group of almost non-negatively curved manifolds, 1989, unpublished.
- [Pe2]
- P. Petersen, Riemannian geometry, GTM 171, Springer-Verlag, 1998.MR 98m:53001
- [Ri]
- W. Rinow, Die innere Geometric der metrischen Raume, Springer, 1961.MR 23:A1290
- [So]
- C. Sormani, Nonnegative Ricci curvature, small linear diameter growth and finite generation of fundamental groups,
- [Sp]
- E. Spanier, Algebraic Topology, McGraw-Hill, Inc., 1966. MR 83i:55001
- [Tu]
- W. Tuschmann, Hausdorff convergence and the fundamental group, Math. Z. 218 (1995) 207-211. MR 96c:53066
- [Zh]
- S-H Zhu, A finiteness theorem for Ricci curvature in dimension three. J. Differential Geom. 37 (1993), no. 3, 711-727. MR 94f:53071
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Additional Information:
Christina
Sormani
Affiliation:
Department of Mathematics and Computer Science, Lehman College, City University of New York, Bronx, New York 10468
Email:
sormani@g230.lehman.cuny.edu
Guofang
Wei
Affiliation:
Department of Mathematics, University of California, Santa Barbara, California 93106
Email:
wei@math.ucsb.edu
DOI:
10.1090/S0002-9947-01-02802-1
PII:
S 0002-9947(01)02802-1
Received by editor(s):
September 6, 2000
Posted:
April 26, 2001
Additional Notes:
Partially supported by NSF Grant \#DMS-9971833
Copyright of article:
Copyright
2001,
American Mathematical Society
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