Il’in, Yu. Existence of an invariant foliation near a locally integral surface of neutral type. (English) Zbl 1496.34082 Lobachevskii J. Math. 42, No. 14, 3438-3450 (2021). Reviewer: Gani T. Stamov (Sliven) MSC: 34C45 34A34 34C05 34D20 PDFBibTeX XMLCite \textit{Yu. Il'in}, Lobachevskii J. Math. 42, No. 14, 3438--3450 (2021; Zbl 1496.34082) Full Text: DOI
Il’in, Yuriĭ Anatol’evich General problems of explicit integration of differential inequalities. (English. Russian original) Zbl 1391.34031 Vestn. St. Petersbg. Univ., Math. 50, No. 4, 364-371 (2017); translation from Vestn. St-Peterbg. Univ., Ser. I, Mat. Mekh. Astron. 4(62), No. 4, 597-607 (2017). Reviewer: Andrei Perjan (Chişinău) MSC: 34A40 34C10 58E50 PDFBibTeX XMLCite \textit{Y. A. Il'in}, Vestn. St. Petersbg. Univ., Math. 50, No. 4, 364--371 (2017; Zbl 1391.34031); translation from Vestn. St-Peterbg. Univ., Ser. I, Mat. Mekh. Astron. 4(62), No. 4, 597--607 (2017) Full Text: DOI