Maximal discrete subgroups of 𝑆𝑂⁺(2,𝑛+2)
| Autor: | Aloys Krieg, Felix Schaps |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Proceedings of the American Mathematical Society. |
| ISSN: | 1088-6826 0002-9939 |
| Popis: | We characterize the maximal discrete subgroups ofSO+(2,n+2)SO^+(2,n+2), which contain the discriminant kernel of an even lattice with two hyperbolic planes overZ\mathbb {Z}. They coincide with the normalizers inSO+(2,n+2)SO^+(2,n+2)and are given by the group of all integral matrices insideSO+(2,n+2)SO^+(2,n+2), whenever the underlying lattice is maximal even. Finally we deal with the irreducible root lattices as examples. |
| Databáze: | OpenAIRE |
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