论文标题
对猫（0）空间的薄动作
Thin actions on CAT(0) spaces
论文作者
论文摘要
我们研究了包装，地球完整，CAT $（0）$的同密的组，每个点的收缩期仅根据包装而小于通用常数，从而推断出强烈的刚性结果。我们表明，如果上述空间具有某些负曲率行为，那么它不能支持薄的动作：这将经典的Margulis引理概括为更广泛的空间。
We study groups of isometries of packed, geodesically complete, CAT$(0)$-spaces for which the systole at every point is smaller than a universal constant depending only on the packing, deducing strong rigidity results. We show that if a space as above has some negative curvature behaviour then it cannot support a thin action: this generalizes the classical Margulis Lemma to a broader class of spaces.
