期刊
MATHEMATISCHE ZEITSCHRIFT
卷 276, 期 1-2, 页码 133-152出版社
SPRINGER
DOI: 10.1007/s00209-013-1190-5
关键词
Non-negative curvature; Circle action; Torus action; 4-manifolds; 5-manifolds; Symmetry rank
类别
Let , be a compact, simply connected -manifold which admits some Riemannian metric with non-negative curvature and an isometry group of maximal possible rank. Then any smooth, effective action on by a torus is equivariantly diffeomorphic to an isometric action on a normal biquotient. Furthermore, it follows that any effective, isometric circle action on a compact, simply connected, non-negatively curved four-dimensional manifold is equivariantly diffeomorphic to an effective, isometric action on a normal biquotient.
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