| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2009: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2008: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Research Abstract |
We prove that given an Alexandrov space and a positive Radon measure on it, if the measure satisfies a comparison condition of Bishop-Gromov type and if the space contains a straight line, then the space is homeomorphic to the direct product of some space and the real line. This is a generalization of the Cheeger-Gromall splitting theorem.
As another result, given a sequence of closed Riemannian manifolds of nonnegative Ricci curvature and with a uniform upper bound of diameter, if the k-th eigenvalue of the Laplacian of the manifold in the sequence is divergent to infinity, then the first eigenvalue is also divergent and the measure concentration happens.
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