Perelman’s invariant, Ricci flow, and the Yamabe invariants of smooth manifolds
Perelman’s invariant, Ricci flow, and the Yamabe invariants of smooth manifolds
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DOI:
10.1007/s00013-006-2181-0
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发表时间:
2006-10
影响因子:
0.6
通讯作者:
K. Akutagawa;M. Ishida;C. LeBrun
中科院分区:
文献类型:
--
作者:
K. Akutagawa;M. Ishida;C. LeBrun
In his study of Ricci flow, Perelman introduced a smooth-manifold invariant called. We show here that, for completely elementary reasons, this invariant simply equals the Yamabe invariant, alias the sigma constant, whenever the latter is non-positive. On the other hand, the Perelman invariant just equals +∞ whenever the Yamabe invariant is positive.