Linear system and its perturbed system

MR0209593 Yoshizawa, Taro and Kato, Junji Taro YOSHIZAWA and Junji KATO Linear system and its perturbed system Funkcialaj Ekvacioj. Serio Internacia 9 1966 9--15 http://fe.math.kobe-u.ac.jp/FE/Free/vol09/fe09-8.pdf http://fe.math.kobe-u.ac.jp/FE/FE_pdf_with_bookmark/FE01-10-en_KML/fe09-009-015/fe09-009-015.pdf http://www.ams.org/mathscinet-getitem?mr=MR0209593 fe09-009-015 1966 Linear System and its Perturbed System YOSHIZAWA, Taro; KATO, Junji YOSHIZAWA, Taro; KATO, Junji

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