ARRStanišev, Ivana2025-05-092025-05-0920221607-360610.2989/16073606.2020.1851310https://repozitorijum.tfbor.bg.ac.rs/handle/123456789/5964We define the star partial order for matrices in spaces with an indefinite inner product. We also give a characterization of that order in terms of matrices and their Moore-Penrose inverses. Finally, some interesting properties are shown.enMoore-Penrose inverseIndefinite inner productadjointpartial ordersstar partial ordersarticle