Embeddings from noncompact symmetric spaces to their compact duals

Every compact symmetric space $M$ admits a dual noncompact symmetric space $check{M}$. When $M$ is a generalized Grassmannian, we can view $check{M}$ as a open submanifold of it consisting of space-like subspaces cite{HL}. Motivated from this, we study the embeddings from noncompact symmetric spaces to their compact duals, including space-like embedding for generalized Grassmannians, Borel embedding for Hermitian symmetric spaces and the generalized embedding for symmetric R-spaces. We will compare these embeddings and describe their images using cut loci.