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@article{1300607, author = {Šepitka, Peter and Šimon Hilscher, Roman}, article_number = {9}, doi = {http://dx.doi.org/10.1016/j.jde.2015.06.027}, keywords = {Linear Hamiltonian system; Antiprincipal solution at infinity; Principal solution at infinity; Minimal principal solution; Controllability; Normality; Conjoined basis; Order of abnormality; Genus of conjoined bases; Moore-Penrose pseudoinverse}, language = {eng}, issn = {0022-0396}, journal = {Journal of Differential Equations}, title = {Principal and antiprincipal solutions at infinity of linear Hamiltonian systems}, volume = {259}, year = {2015} }
TY - JOUR ID - 1300607 AU - Šepitka, Peter - Šimon Hilscher, Roman PY - 2015 TI - Principal and antiprincipal solutions at infinity of linear Hamiltonian systems JF - Journal of Differential Equations VL - 259 IS - 9 SP - 4651-4682 EP - 4651-4682 PB - Elsevier SN - 00220396 KW - Linear Hamiltonian system KW - Antiprincipal solution at infinity KW - Principal solution at infinity KW - Minimal principal solution KW - Controllability KW - Normality KW - Conjoined basis KW - Order of abnormality KW - Genus of conjoined bases KW - Moore-Penrose pseudoinverse N2 - The concept of principal solutions at infinity for possibly abnormal linear Hamiltonian systems was recently introduced by the authors. In this paper we develop the theory of antiprincipal solutions at infinity and establish a limit characterization of the principal solutions. That is, we prove that the principal solutions are the smallest ones at infinity when they are compared with the antiprincipal solutions. This statement is a generalization of the classical result of W. T. Reid, P. Hartman, or W. A. Coppel for controllable linear Hamiltonian systems. We also derive a classification of antiprincipal solutions at infinity according to their rank and show that the antiprincipal solutions exist for any rank in the range between explicitly given minimal and maximal values. We illustrate our new theory by several examples. ER -
ŠEPITKA, Peter a Roman ŠIMON HILSCHER. Principal and antiprincipal solutions at infinity of linear Hamiltonian systems. \textit{Journal of Differential Equations}. Elsevier, 2015, roč.~259, č.~9, s.~4651-4682. ISSN~0022-0396. Dostupné z: https://dx.doi.org/10.1016/j.jde.2015.06.027.
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