Mohamed Belkhelfa

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Pseudo-parallel (shortly PP) submanifolds are defined as a generalization of semi-parallel (shortly SP) submanifolds and as extrinsic analogue of pseudo-symmetric (shortly PS) manifolds (in the sense of R. Deszcz) [1], [26]. Asperti et al [1] obtained a description of PP hypersurfaces in space form as quasi-umbilic hypersurfaces or cyclids of Dupin and(More)
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