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(2003 / vol.6 / no.1)
Maximal Holonomy of Infra-Nilmanifolds with $bfH_7$-Geometry
Ku Yong Ha
Pages. 93-97     



1. Introduction
2. Criteria for existence of lifting
3. Elimination of special cases and the Existence with holinomy order $48$



almost Bieberbach group, holonomy group, quaternionic Heisenberg group, quaternionic hyperbolic manifold



20H15, 20F18, 20E99, 53C55