Sasakian-Einstein structures on 9#(²×³)
Sasakian-Einstein structures on 9#(²×³)
复制标题
9(2×3) 上的 Sasakian-Einstein 结构
DOI:
10.1090/s0002-9947-02-03015-5
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发表时间:
2002
影响因子:
1.3
通讯作者:
M. Nakamaye
中科院分区:
文献类型:
--
作者:
C. Boyer;K. Galicki;M. Nakamaye
We show that 9#(S 2 × S 3 ) admits an 8-dimensional complex family of inequivalent non-regular Sasakian-Einstein structures. These are the first known Einstein metrics on this 5-manifold. In particular, the bound b 2 (M)≤8 which holds for any regular Sasakian-Einstein M does not apply to the non-regular case. We also discuss the failure of the Hitchin-Thorpe inequality in the case of 4-orbifolds and describe the orbifold version.