The realization problem for J?rgensen numbers
The realization problem for J?rgensen numbers
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J?rgensen 数的实现问题
DOI:
10.1090/ecgd/331
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Yamazaki Ryosuke
中科院分区:
文献类型:
--
作者:
Yamashita Yasushi;Yamazaki Ryosuke
Letbe a two-generator subgroup of. The Jørgensen numberofis defined by\[J (G)=\inf\{|\mathrm {tr}^ 2 A-4|+|\mathrm {tr}[A, B]-2|\:;\: G=\langle A, B\rangle\}.\] Ifis a non-elementary Kleinian group, then. This inequality is called Jørgensen’s inequality. In this paper, we show that, for any, there exists a non-elementary Kleinian group whose Jørgensen number is equal to. This answers a question posed by Oichi and Sato. We also present our computer generated picture which estimates Jørgensen numbers from above in the diagonal slice of Schottky space. References