论文标题
在卷保护差异群体上的群旋转
Group cocycles on the volume-preserving diffeomorphism group
论文作者
论文摘要
我们在量化量的差异组上构造了两种组共生。我们表明，对于球体的体积保护差异群，其中一个Cocycles给出了欧拉的平面束束。
We construct two kinds of group cocycles on the volume-preserving diffeomorphism group. We show that, for the volume-preserving diffeomorphism group of the sphere, one of the cocycles gives the Euler class of flat sphere bundles.
