Abstract
We show that any effective isometric torus action of maximal rank on a compact Riemannian manifold with positive (sectional) curvature and maximal symmetry rank, that is, on a positively curved sphere, lens space, complex or real projective space, is equivariantly diffeomorphic to a linear action. We show that a compact, simply connected Riemannian 4- or 5-manifold of quasipositive curvature and maximal symmetry rank must be diffeomorphic to the 4-sphere, complex projective plane or the 5-sphere.
2000 Mathematics Subject Classification. 53C20.
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Notes
- 1.
The author “Fernando Galaz-Garcia” is part of SFB 878: Groups, Geometry & Actions, at the University of Münster.
References
S. Aloff, N.R. Wallach, An infinite family of distinct 7-manifolds admitting positively curved Riemannian structures. Bull. Am. Math. Soc. 81, 93–97 (1975)
L. Berard-Bergery, Les variétés riemanniennes homogènes simplement connexes de dimension impaire á courbure strictement positive (French). J. Math. Pures Appl. (9) 55(1), 47–67 (1976)
M. Berger, Les variétés riemanniennes homogènes normales simplement connexes á courbure strictement positive (French). Ann. Scuola Norm. Sup. Pisa (3) 15, 179–246 (1961)
G.E. Bredon, Introduction to Compact Transformation Groups. Pure and Applied Mathematics, vol. 46 (Academic, New York/London, 1972)
D. Burago, Y. Burago, S. Ivanov, A Course in Metric Geometry. Graduate Studies in Mathematics, vol. 33 (American Mathematical Society, Providence, 2001)
O. Dearricott, A 7-manifold with positive curvature. Duke Math. J. 158(2), 307–346 (2011)
O. Dearricott, Relations between metrics of almost positive curvature on the Gromoll-Meyer sphere. Proc. Am. Math. Soc. 140(6), 2169–2178 (2012)
J. DeVito, The classification of simply connected biquotients of dimension at most 7 and 3 new examples of almost positively curved manifolds. Ph.D. Thesis, University of Pennsylvania, 2011. http://repository.upenn.edu/edissertations/311.
J.-H. Eschenburg, M. Kerin, Almost positive curvature on the Gromoll-Meyer sphere. Proc. Am. Math. Soc. 136(9), 3263–3270 (2008)
R. Fintushel, Circle actions on simply connected 4-manifolds. Trans. Am. Math. Soc. 230, 147–171 (1977)
R. Fintushel, Classification of circle actions on 4-manifolds. Trans. Am. Math. Soc. 242, 377–390 (1978)
F. Galaz-Garcia, C. Searle, Low-dimensional manifolds with non-negative curvature and maximal symmetry rank. Proc. Am. Math. Soc. 139, 2559–2564 (2011)
F. Galaz-Garcia, C. Searle, Non-negatively curved 5-manifolds with almost maximal symmetry rank. Geom. Topol. Preprint: arXiv:1111.3183 [math.DG] (2014, in press)
F. Galaz-Garcia, M. Kerin, Cohomogeneity-two torus actions on non-negatively curved manifolds of low dimension. Math. Z. 276(1–2), 133–152 (2014)
D. Gromoll, W. Meyer, An exotic sphere with nonnegative sectional curvature. Ann. Math. 100, 401–408 (1974)
K. Grove, Geometry of, and via, symmetries, in Conformal, Riemannian and Lagrangian Geometry, Knoxville, 2000. University Lecture Series, vol. 27 (American Mathematical Society, Providence, 2002), pp. 31–53
K. Grove, C. Searle, Positively curved manifolds with maximal symmetry-rank. J. Pure Appl. Algebra 91(1–3), 137–142 (1994)
K. Grove, C. Searle, Differential topological restrictions curvature and symmetry. J. Differ. Geom. 47(3), 530–559 (1997)
K. Grove, W. Ziller, Curvature and symmetry of Milnor spheres. Ann. Math. (2) 152(1), 331–367 (2000)
K. Grove, B. Wilking, W. Ziller, Positively curved cohomogeneity one manifolds and 3-Sasakian geometry. J. Differ. Geom. 78(1), 33–111 (2008)
K. Grove, L. Verdani, W. Ziller, An exotic T 1 S 4) with positive curvature. Geom. Funct. Anal. 21(3), 499–524 (2011)
R.S. Hamilton, Four-manifolds with positive curvature operator. J. Differ. Geom. 24(2), 153–179 (1986)
W.Y. Hsiang, B. Kleiner, On the topology of positively curved 4-manifolds with symmetry. J. Differ. Geom. 29(3), 615–621 (1989)
M. Kerin, Some new examples with almost positive curvature. Geom. Topol. 15(1), 217–260 (2011)
S. Kim, D. McGavran, J. Pak, Torus group actions on simply connected manifolds. Pac. J. Math. 53, 435–444 (1974)
B. Kleiner, Riemannian four-manifolds with nonnegative curvature and continuous symmetry. Ph.D. Thesis, U.C. Berkeley, 1989
S. Kobayashi, Transformation Groups in Differential Geometry. Ergebnisse der Mathematik und ihrer Grenzgebiete, Band 70 (Springer, New York/Heidelberg, 1972)
J. Kollár, Circle actions on simply connected 5-manifolds. Topology 45(3), 643–671 (2006)
S.B. Myers, N. Steenrod, The group of isometries of a Riemannian manifold. Ann. Math. (2) 40(2), 400–416 (1939)
W.D. Neumann, 3-Dimensional G-manifolds with 2-dimensional orbits. in 1968 Proceedings Conference on Transformation Groups, New Orleans, 1967, pp. 220–222
H.S. Oh, 6-Dimensional manifolds with effective T 4-actions. Topol. Appl. 13(2), 137–154 (1982)
H.S. Oh, Toral actions on 5-manifolds. Trans. Am. Math. Soc. 278(1), 233–252 (1983)
P. Orlik, F. Raymond, Actions of SO(2) on 3-manifolds, in Proceeding Conference on Transformation Groups, New Orleans, 1967 (Springer, New York, 1968) pp. 297–318
P. Orlik, F. Raymond, Actions of the torus on 4-manifolds. I. Trans. Am. Math. Soc. 152, 531–559 (1970)
P. Orlik, F. Raymond, Actions of the torus on 4-manifolds. II. Topology 13, 89–112 (1974)
J. Pak, Actions of torus T n on (n + 1)-manifolds M n+1. Pac. J. Math. 44, 671–674 (1973)
G. Perelman, Proof of the soul conjecture of Cheeger and Gromoll. J. Differ. Geom. 40, 209–212 (1994)
P. Petersen, F. Wilhelm, Examples of Riemannian manifolds with positive curvature almost everywhere. Geom. Topol. 3, 331–367 (1999)
P. Petersen, F. Wilhelm, An exotic sphere with positive sectional curvature (2008). arXiv:0805.0812v3 [math.DG]
F. Raymond, Classification of the actions of the circle on 3-manifolds. Trans. Am. Math. Soc. 131, 51–78 (1968)
X. Rong, Positively curved manifolds with almost maximal symmetry rank, in Proceedings of the Conference on Geometric and Combinatorial Group Theory, Part II, Haifa, 2000. Geometriae Dedicata, vol. 95 (2002), pp. 157–182
C. Searle, D. Yang, On the topology of non-negatively curved simply-connected 4-manifolds with continuous symmetry. Duke Math. J. 74(2), 547–556 (1994)
K. Tapp, Quasi-positive curvature on homogeneous bundles. J. Differ. Geom. 65(2), 273–287 (2003)
L. Verdiani, Cohomogeneity one Riemannian manifolds of even dimension with strictly positive sectional curvature, I. Math. Z. 241, 329–339 (2002)
L. Verdiani, Cohomogeneity one manifolds of even dimension with strictly positive sectional curvature. J. Differ. Geom. 68(1), 31–72 (2004)
N.R. Wallach, Compact homogeneous Riemannian manifolds with strictly positive curvature. Ann. Math. (2) 96, 277–295 (1972)
F. Wilhelm, An exotic sphere with positive curvature almost everywhere. J. Geom. Anal. 11(3), 519–560 (2001)
B. Wilking, The normal homogeneous space has positive sectional curvature. Proc. Am. Math. Soc. 127(4), 1191–1194 (1999)
B. Wilking, Manifolds with positive sectional curvature almost everywhere. Invent. Math. 148(1), 117–141 (2002)
B. Wilking, Torus actions on manifolds of positive sectional curvature. Acta Math. 191(2), 259–297 (2003)
B. Wilking, Positively curved manifolds with symmetry. Ann. Math. (2) 163(2), 607–668 (2006)
B. Wilking, Nonnegatively and positively curved manifolds, in Surveys in Differential Geometry, vol. XI (International Press, Somerville, 2007), pp. 25–62
W. Ziller, Examples of Riemannian manifolds with non-negative sectional curvature, in Surveys in Differential Geometry, vol. XI (International Press, Somerville, 2007), pp. 63–102
B. Wilking, Torus actions on manifolds with quasipositive curvature. Notes by M. Kerin (2008) Unpublished
Acknowledgements
This note originated from talks I gave at the Tercer Miniencuentro de Geometría Diferencial in December of 2010, at CIMAT, México. It is a pleasure to thank Rafael Herrera, Luis Hernández-Lamoneda and CIMAT for their hospitality during the workshop. I also wish to thank Martin Kerin, for sharing his notes with the proof of Theorem 1.3, and Xiaoyang Chen, for some conversations on quasipositively curved manifolds.
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Galaz-Garcia, F. (2014). A Note on Maximal Symmetry Rank, Quasipositive Curvature, and Low Dimensional Manifolds. In: Geometry of Manifolds with Non-negative Sectional Curvature. Lecture Notes in Mathematics, vol 2110. Springer, Cham. https://doi.org/10.1007/978-3-319-06373-7_3
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DOI: https://doi.org/10.1007/978-3-319-06373-7_3
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