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Relations between metrics of almost positive curvature on the Gromoll-Meyer sphere
Author:
Owen Dearricott
Journal:
Proc. Amer. Math. Soc. 140 (2012), 2169-2178
MSC (2010):
Primary 53C21
Posted:
October 12, 2011
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Abstract: We give a simplified proof that Wilhelm's metric on the Gromoll-Meyer sphere has positive curvature almost everywhere. We determine that its zero locus coincides with that of the almost positively curved metric of Eschenburg and Kerin.
References
- 1.
Jeff
Cheeger, Some examples of manifolds of nonnegative curvature,
J. Differential Geometry 8 (1973), 623–628. MR 0341334
(49 #6085)
- 2.
Jost-Hinrich
Eschenburg, Freie isometrische Aktionen auf kompakten Lie-Gruppen
mit positiv gekrümmten Orbiträumen, Schriftenreihe des
Mathematischen Instituts der Universität Münster, 2. Serie
[Series of the Mathematical Institute of the University of Münster,
Series 2], vol. 32, Universität Münster Mathematisches
Institut, Münster, 1984 (German). MR 758252
(86a:53045)
- 3.
J.-H.
Eschenburg and M.
Kerin, Almost positive curvature on the
Gromoll-Meyer sphere, Proc. Amer. Math.
Soc. 136 (2008), no. 9, 3263–3270. MR 2407092
(2009a:53061), http://dx.doi.org/10.1090/S0002-9939-08-09429-X
- 4.
Detlef
Gromoll and Wolfgang
Meyer, An exotic sphere with nonnegative sectional curvature,
Ann. of Math. (2) 100 (1974), 401–406. MR 0375151
(51 #11347)
- 5.
Barrett
O’Neill, The fundamental equations of a submersion,
Michigan Math. J. 13 (1966), 459–469. MR 0200865
(34 #751)
- 6.
Frederick
Wilhelm, An exotic sphere with positive curvature almost
everywhere, J. Geom. Anal. 11 (2001), no. 3,
519–560. MR 1857856
(2002f:53056), http://dx.doi.org/10.1007/BF02922018
- 7.
Burkhard
Wilking, Manifolds with positive sectional curvature almost
everywhere, Invent. Math. 148 (2002), no. 1,
117–141. MR 1892845
(2003a:53049), http://dx.doi.org/10.1007/s002220100190
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Additional Information
Owen Dearricott
Affiliation:
Department of Mathematics, University of California, Riverside, Riverside, California 92521
Address at time of publication:
Department of Mathematics, University of California, Los Angeles, Box 951555, Los Angeles, California 90095-1555
Email:
owend@ucr.edu
DOI:
http://dx.doi.org/10.1090/S0002-9939-2011-11056-6
PII:
S 0002-9939(2011)11056-6
Received by editor(s):
November 10, 2010
Received by editor(s) in revised form:
February 1, 2011
Posted:
October 12, 2011
Communicated by:
Chuu-Lian Terng
Article copyright:
© Copyright 2011 American Mathematical Society
The copyright for this article reverts to public domain after
28 years from publication.
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