Paraquaternionic CR-Submanifolds

  • Gabriel-Eduard Vîlcu


Paraquaternionic structures, at first known as quaternionic structures of second kind, are due to P. Libermann. Their study parallels that of quaternionic manifolds, yet relies on the algebra of paraquaternionic numbers. The counterpart in odd dimension of a paraquaternionic structure was introduced in 2006 by S. Ianuş, R. Mazzocco and G.E. Vîlcu and is referred to as a mixed 3-structure. It appears in a natural way on lightlike hypersurfaces in paraquaternionic manifolds. In this paper we review basic results concerning several types of submanifolds and semi-Riemannian submersions of manifolds endowed with paraquaternionic and mixed 3-structures.


Paraquaternionic structure Mixed 3-structure CR-submanifold Semi-Riemannian submersion Foliation 

2000 Mathematics Subject Classification




The author was supported by CNCS-UEFISCDI, project number PN-II-ID-PCE-2011-3-0118.


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© Springer Science+Business Media Singapore 2016

Authors and Affiliations

  1. 1.Petroleum-Gas University of PloieştiPloieştiRomania
  2. 2.Faculty of Mathematics and Computer ScienceUniversity of Bucharest, Research Center in Geometry, Topology and AlgebraBucharestRomania

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