Abstract
We study slant submanifolds of quaternion Kaehler manifold and in particular of a quaternion projective space. We obtain a sharp estimate of the Ricci tensor of a slant submanifold M in a quaternion projective space QP(m)(4c) in terms of the main extrinsic invariant, namely the square mean curvature. (C) 2011 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.