秩为2的Kac-Moody群的极小余体积的余紧格(II部分)
Cocompact lattices of minimal covolume in rank 2 Kac-Moody groups, Part II
摘要:
设G是定义在有限域F_q上的具有对称Cartan矩阵的秩为2的拓扑Kac-Moody群.一个例子是G = SL(2,F_q((t^{-1})。确定了G中余紧格的余体积的一个正的下界,并构造了一个实现这一最小值的余紧格Γ 0 < G.这完成了第一部分开始的工作,第一部分考虑了G允许边传递格的情况。
英文摘要:
Let G be a topological Kac-Moody group of rank 2 with symmetric Cartan matrix, defined over a finite field F_q. An example is G = SL(2,F_q((t^{-1}))). We determine a positive lower bound on the covolumes of cocompact lattices in G, and construct a cocompact lattice Γ_0 < G which realises this minimum. This completes the work begun in Part I, which considered the cases when G admits an edge-transitive lattice.
机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。