Authors: Guţul Ion
Abstract
In article [1] the authors construct and classify all the hyperbolic space-forms H
n/Gamma where Gamma is a torsion-free subgroup of minimal index in the congruence two subgroup Gamma
2n for n=3,4. In the present paper some hyperbolic 3- and 4-manifolds are constructed that are absent in [1].
Institute of Mathematics and Computer Science
cademy of Sciences of Moldova
5 Academiei str.,
Chisinau, MD-2028 Moldova
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