On the Berger conjecture for manifolds all of whose geodesics are closed
On the Berger conjecture for manifolds all of whose geodesics are closed
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关于所有测地线均闭的流形的伯杰猜想
DOI:
10.1007/s00222-017-0742-4
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发表时间:
2017
影响因子:
3.1
通讯作者:
Burkhard Wilking
中科院分区:
文献类型:
--
作者:
Marco Radeschi;Burkhard Wilking
We define a Besse manifold as a Riemannian manifold (M,g) all of whose geodesics are closed. A conjecture of Berger states that all prime geodesics have the same length for any simply connected Besse manifold. We firstly show that the energy function on the free loop space of a simply connected Besse manifold is a perfect Morse–Bott function with respect to a suitable cohomology. Secondly we explain when the negative bundles along the critical manifolds are orientable. These two general results, then lead to a solution of Berger’s conjecture when the underlying manifold is a sphere of dimension at least four.
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