The Miyaoka-Yau inequality for minimal Kähler klt spaces

Abstract: In this paper, we prove the existence of $L^p$-approximate critical Hermitian structures on Higgs orbi-bundles over compact Gauduchon orbifolds. In terms of the orbifold Chern classes, we obtain the generalized Bogomolov type inequality for general Higgs sheaves on compact K\"{a}hler klt spaces with respect to the nef and big classes. As an application, we derive the Bogomolov-Gieseker inequality for semistable Higgs sheaves with respect to the nef classes of numerical dimension $\geq n-1$. Furthermore, we prove the Miyaoka-Yau inequality for all minimal K\"{a}hler klt spaces.