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arXiv 0903.0138math.GRmath.GT
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无穷多个到19维的双曲Coxeter群

Infinitely many hyperbolic Coxeter groups through dimension 19

Daniel Allcock

摘要:

我们证明了:存在无穷多个有限余体积(分别为)。余紧的)Coxeter群作用在双曲空间H^n上,其中n < 20(分别为n < 7)。当n=7或8时,它们可以被认为是非算术的。此外,当1 < n < 20时,除了n=16和17之外,H^n中具有体积小于或等于V的非紧基本区的本质不同Coxeter群的数目至少相对于V呈指数增长。该技术是一种加倍技巧及其变体;充分利用该方法需要对Leech晶格进行一些工作。

英文摘要:

We prove the following: there are infinitely many finite-covolume (resp. cocompact) Coxeter groups acting on hyperbolic space H^n for every n < 20 (resp. n < 7). When n=7 or 8, they may be taken to be nonarithmetic. Furthermore, for 1 < n < 20, with the possible exceptions n=16 and 17, the number of essentially distinct Coxeter groups in H^n with noncompact fundamental domain of volume less than or equal to V grows at least exponentially with respect to V. The same result holds for cocompact groups for n < 7. The technique is a doubling trick and variations on it; getting the most out of the method requires some work with the Leech 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。

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