Foundation item: the National Natural Science Foundation of China (No. 10562002); the Natural Science Foundation of Inner Mongolia (Nos. 200508010103; 200711020106); the Specialized Research Fund of the Doctoral Program of Higher Education of China (No. 20070126002); Research Foundation for Talented Scholars of Inner Mongolia University (No. 206029).
In this paper, by using characterization of the point spectrum of the upper triangular infinite dimensional Hamiltonian operator H, a necessary and sufficient condition is obtained on the symmetry of σP(A) and σ1/...
the National Natural Science Foundation of China (No.10562002);the Specialized Research Foundation for the Doctoral Program of Higher Education (No.20070126002);the Scientific Research Foun-dation for the Returned Overseas Chinese Scholars
Let H1, H2 and H3 be infinite dimensional separable complex Hilbert spaces. We denote by M(D,V,F) a 3×3 upper triangular operator matrix acting on Hi +H2+ H3 of theform M(D,E,F)=(A D F 0 B F 0 0 C).For given...