INVERTIBILITY AND INVERTIBLE COMPLETION OF UNBOUNDED SINGULAR■-SELF-ADJOINT OPERATOR MATRICES
Junjie Huang · Xitong kexue yu shuxue · 2011
The invertibility of unbounded singular■-self-adjoint operator matrices is characterized,and the necessary and sufficient condition for certain partial operator matrices to exist invertible completion is further obtained.Moreover,some concrete examples are presented to illustrate the results.