@article{oai:nagoya.repo.nii.ac.jp:00005267, author = {Hayakawa, Yoshikazu and Dragoslav, D. ŠILJAK}, issue = {10}, journal = {IEEE Transactions on Automatic Control}, month = {Oct}, note = {Graph-theoretic conditions are obtained for a structured system to have a property that the supremal L_p-almost invariant (controllability) subspace is generically the entire state space and that the infimal L_p-almost conditional inzariant (complementary observability) subspace is generically the zero subspace. The conditions are used to determine stabilizability of structured interconnected systems via decentralized feedback control. Although the obtained graph-theoretic conditions are conservative, they are considered satisfactory to the extent that the benefits of easy testability involving only binary calculatiions outweigh the conservativeness in the results.}, pages = {931--939}, title = {On almost invariant subspaces of structural systems and decentralized control}, volume = {33}, year = {1988} }