On a Riemannian invariant of Chen type

Abstract

In [6] we proved Chen's inequality regarded as a problem of constrained maximum. In this paper we introduce a Riemannian invariant obtained from Chen's invariant, replacing the sectional curvature by the Ricci curvature of k-order. This invariant can be estimated, in the case of submanifolds M in space forms $\tilde{M}(c)$, varying with c and the mean curvature of M in $\tilde{M}(c)$. A improuvement of this inequality in the Lagrangian case is obtained.

The paper is submitted to Rocky Mountain Journal of Mathematics