Abstract
Seventy years ago, Myers and Steenrod showed that the isometry group of a Riemannian manifold without boundary has a structure of Lie group. In 2007, Bagaev and Zhukova proved the same result for a Riemannian orbifold. In this paper, the authors first show that the isometry group of a Riemannian manifold M with boundary has dimension at most ½ dimM(dimM − 1). Then such Riemannian manifolds with boundary that their isometry groups attain the preceding maximal dimension are completely classified.
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Project supported by the National Natural Science Foundation of China (Nos. 10601053, 10671096, 10871184, 10971104).
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Chen, Z., Shi, Y. & Xu, B. The Riemannian manifolds with boundary and large symmetry. Chin. Ann. Math. Ser. B 31, 347–360 (2010). https://doi.org/10.1007/s11401-009-0037-1
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DOI: https://doi.org/10.1007/s11401-009-0037-1