In this paper, we study the iterative algorithms for saddle point problems(SPP). Bai, Golub and Pan recently studied a class of preconditioned Hermitian and skew-Hermitian splitting methods(PHSS). By further accelerating it with another parameters, using the Hermitian/skew-Hermitian splitting iteration technique we present the generalized preconditioned Hermitian and skew-Hermitian splitting me...

In this paper we study invariant almost Hermitian geometry on generalized flag manifolds. We will focus providing examples of K\"ahler like scalar curvature metric, that is, structures $(g,J)$ satisfying $s=2s_{\rm C}$, where $s$ is Riemannian and $s_{\rm C}$ the Chern curvature.

Combating the effects of disorder on light transport in micro- and nano-integrated photonic devices is of major importance from both fundamental and applied viewpoints. In ordinary waveguides, imperfections and disorder cause unwanted back-reflections, which hinder large-scale optical integration. Topological photonic structures, a new class of optical systems inspired by quantum Hall effect an...