Osserman Conjecture in dimension n ≠ 8, 16
Osserman Conjecture in dimension n ≠ 8, 16
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DOI:
10.1007/s00208-004-0580-8
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发表时间:
2005-01
影响因子:
1.4
通讯作者:
Y. Nikolayevsky
中科院分区:
文献类型:
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作者:
Y. Nikolayevsky
LetMnbe a Riemannian manifold andRits curvature tensor. For a pointp∈Mnand a unit vectorX∈TpMn, the Jacobi operator is defined byRX=R(X,·)X. The manifoldMnis calledpointwise Ossermanif, for everyp∈Mn, the spectrum of the Jacobi operator does not depend of the choice ofX, and is calledglobally Ossermanif it depends neither ofX, nor ofp. Osserman conjectured that globally Osserman manifolds are two-point homogeneous. We prove the Osserman Conjecture forn≠8, 16, and its pointwise version forn≠2, 4, 8, 16. Partial result in the casen=16 is also given.