Paraquaternionic CR-submanifolds of paraquaternionic K?hler manifolds and semi-Riemannian submersions : Open Mathematics

摘要

In this paper we introduce paraquaternionic CR-submanifolds of almost paraquaternionic hermitian manifolds and state some basic results on their differential geometry. We also study a class of semi-Riemannian submersions from paraquaternionic CR-submanifolds of paraquaternionic K?hler manifolds.