Moore-Penrose inverses of Gram matrices Leaving a Cone Invariant in an Indefinite Inner Product Space
arXiv:1502.00382 · doi:10.1515/spma-2015-0013
Abstract
In this paper we characterize Moore-Penrose inverses of Gram matrices leaving a cone invariant in an indefinite inner product space using indefinite matrix multiplication. This characterization includes the acuteness (or obtuseness) of certain closed convex cones.