离散群的Van Kampen嵌入阻塞
Van Kampen's embedding obstruction for discrete groups
摘要:
我们给出了一个可收缩流形的维数的下界,在这个流形上,一个给定的群可以不连续地作用。特别地,我们证明了非阿贝尔自由群的$n$ -倍积不能不连续地作用于$\R^{2n-1}$。
英文摘要:
We give a lower bound to the dimension of a contractible manifold on which a given group can act properly discontinuously. In particular, we show that the $n$-fold product of nonabelian free groups cannot act properly discontinuously on $\R^{2n-1}$.
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