在平方模型中计算随机组
Cubulating random groups in the square model
摘要:
我们的主要结果是,对于密度$<\frac{3}{10}$,平方模型中的随机群具有Haagerup性质并且是剩余有限的.此外,我们推广的等周不等式,一些类的非平面图,并利用这一点,我们介绍了一个系统的修改超图提供的空间结构的墙壁上的凯莱复的随机群。然后我们证明了随机群在这个有壁空间上的自然作用是恰当的,从而给出了随机群在CAT(0)立方复形上的恰当作用。
英文摘要:
Our main result is that for densities $<\frac{3}{10}$ a random group in the square model has the Haagerup property and is residually finite. Moreover, we generalize the Isoperimetric Inequality, to some class of non-planar diagrams and, using this, we introduce a system of modified hypergraphs providing the structure of a space with walls on the Cayley complex of a random group. Then we show that the natural action of a random group on this space with walls is proper, which gives the proper action of a random group on a CAT(0) cube complex.
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