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Zariski density and computing in arithmetic groups

Detinko, A.; Flannery, D. L.; Hulpke, A. (American Mathematical Society (AMS), 2017-01-01)

For n &gt; 2, let Gamma(n) denote either SL( n, Z) or Sp( n, Z). We give a practical algorithm to compute the level of the maximal principal congruence subgroup in an arithmetic group H &lt;= Gamma(n). This forms ...