Lavrenyuk, S. P. A mixed problem for an equation of plate vibration type degenerate in a finite moment of time. (Russian) Zbl 0780.35064 Differ. Uravn. 27, No. 12, 2099-2106 (1991). Reviewer: M.Kopáčková (Praha) MSC: 35L80 74B99 74H99 74K10 74K20 PDFBibTeX XMLCite \textit{S. P. Lavrenyuk}, Differ. Uravn. 27, No. 12, 2099--2106 (1991; Zbl 0780.35064)
Benuar, Nur-Eddin; Yurchuk, N. I. A mixed problem with integral condition for parabolic equations with a Bessel operator. (Russian) Zbl 0771.35025 Differ. Uravn. 27, No. 12, 2094-2098 (1991). Reviewer: R.Johnson (College Park) MSC: 35K20 35M10 PDFBibTeX XMLCite \textit{N.-E. Benuar} and \textit{N. I. Yurchuk}, Differ. Uravn. 27, No. 12, 2094--2098 (1991; Zbl 0771.35025)
Fardigola, L. V. A nonlocal boundary value problem in a layer: Influence of the parameters on the properties of solutions. (Russian) Zbl 0770.35012 Differ. Uravn. 27, No. 12, 2151-2161 (1991). Reviewer: H.D.Voulov (Sofia) MSC: 35E99 35G15 PDFBibTeX XMLCite \textit{L. V. Fardigola}, Differ. Uravn. 27, No. 12, 2151--2161 (1991; Zbl 0770.35012)
Muzylev, N. V. On the uniqueness of the simultaneous determination of the coefficient in a quasilinear parabolic equation and the coefficient in the boundary condition. (Russian) Zbl 0766.35079 Differ. Uravn. 27, No. 12, 2124-2128 (1991). Reviewer: P.Stefanov (Sofia) MSC: 35R30 35K20 PDFBibTeX XMLCite \textit{N. V. Muzylev}, Differ. Uravn. 27, No. 12, 2124--2128 (1991; Zbl 0766.35079)
Muratbekov, M. B. Separability of an operator of mixed type and the completeness of its root vectors. (Russian) Zbl 0766.35027 Differ. Uravn. 27, No. 12, 2128-2137 (1991). Reviewer: Yu.V.Egorov (Toulouse) MSC: 35M10 PDFBibTeX XMLCite \textit{M. B. Muratbekov}, Differ. Uravn. 27, No. 12, 2128--2137 (1991; Zbl 0766.35027)
Romanko, V. K. Boundary value problems for degenerate systems of equations. (Russian) Zbl 0764.35117 Differ. Uravn. 27, No. 12, 2138-2147 (1991). Reviewer: M.Tvrdý (Praha) MSC: 35R15 34G10 34B05 PDFBibTeX XMLCite \textit{V. K. Romanko}, Differ. Uravn. 27, No. 12, 2138--2147 (1991; Zbl 0764.35117)
Titskij, V. P. On the method of R-functions and the method of integral equations for solving problems of mathematical physics. (Russian) Zbl 0753.65089 Differ. Uravn. 27, No. 12, 2147-2151 (1991). Reviewer: V.Ionescu (Bucureşti) MSC: 65N38 65R20 35J05 35C15 45E10 PDFBibTeX XMLCite \textit{V. P. Titskij}, Differ. Uravn. 27, No. 12, 2147--2151 (1991; Zbl 0753.65089)
Panasyuk, A. I. Properties of solutions of ordinary differential equations of approximate type in \(R^ n\). (Russian) Zbl 0748.49024 Differ. Uravn. 27, No. 12, 2065-2077 (1991). Reviewer: C.Vârsan (Bucureşti) MSC: 49L99 PDFBibTeX XMLCite \textit{A. I. Panasyuk}, Differ. Uravn. 27, No. 12, 2065--2077 (1991; Zbl 0748.49024)
Korobov, V. I.; Sklyar, G. M. Letter to the editor. (Russian) Zbl 0746.93042 Differ. Uravn. 27, No. 12, 2201 (1991). MSC: 93C15 93B50 PDFBibTeX XMLCite \textit{V. I. Korobov} and \textit{G. M. Sklyar}, Differ. Uravn. 27, No. 12, 2201 (1991; Zbl 0746.93042)
Galiullin, I. A. Construction of dynamical systems on manifolds. (Russian) Zbl 0744.58064 Differ. Uravn. 27, No. 12, 2053-2058 (1991). Reviewer: N.Papaghiuc (Iaşi) MSC: 37C10 35-XX PDFBibTeX XMLCite \textit{I. A. Galiullin}, Differ. Uravn. 27, No. 12, 2053--2058 (1991; Zbl 0744.58064)
Brykalov, S. A. Solvability of a nonlinear boundary value problem in a fixed set of functions. (Russian) Zbl 0743.34070 Differ. Uravn. 27, No. 12, 2027-2033 (1991). Reviewer: I.Rachŭnková (Olomouc) MSC: 34K10 34B15 PDFBibTeX XMLCite \textit{S. A. Brykalov}, Differ. Uravn. 27, No. 12, 2027--2033 (1991; Zbl 0743.34070)
Burkin, I. M. On the existence of limit cycles of the second kind of multi-dimensional systems of phase synchronization. (Russian) Zbl 0743.34035 Differ. Uravn. 27, No. 12, 2044-2049 (1991). Reviewer: J.Kalas (Brno) MSC: 34C05 PDFBibTeX XMLCite \textit{I. M. Burkin}, Differ. Uravn. 27, No. 12, 2044--2049 (1991; Zbl 0743.34035)
Budaev, V. D. Criteria for Bessel property and Riesz basis property of systems of root functions of differential operators. I. (Russian) Zbl 0742.34071 Differ. Uravn. 27, No. 12, 2033-2044 (1991). Reviewer: M.Švec (Bratislava) MSC: 34L10 34L05 PDFBibTeX XMLCite \textit{V. D. Budaev}, Differ. Uravn. 27, No. 12, 2033--2044 (1991; Zbl 0742.34071)
Pliss, V. A. Roughness of a periodic system of differential equations. (Russian) Zbl 0741.34034 Differ. Uravn. 27, No. 12, 2077-2081 (1991). Reviewer: A.Halanay (Bucureşti) MSC: 34D30 PDFBibTeX XMLCite \textit{V. A. Pliss}, Differ. Uravn. 27, No. 12, 2077--2081 (1991; Zbl 0741.34034)
Volkov, I. A. On bounds of the set of characteristic exponents of linear differential systems with perturbations of higher order. (Russian) Zbl 0741.34027 Differ. Uravn. 27, No. 12, 2050-2053 (1991). Reviewer: A.Halanay (Bucureşti) MSC: 34D08 34D10 PDFBibTeX XMLCite \textit{I. A. Volkov}, Differ. Uravn. 27, No. 12, 2050--2053 (1991; Zbl 0741.34027)
Goncharov, V. V. Existence theorems for solutions of differential inclusions with lower semicontinuous right-hand side on a locally compact set. (Russian) Zbl 0741.34004 Differ. Uravn. 27, No. 12, 2058-2065 (1991). Reviewer: T.Rzezuchowski (Warszawa) MSC: 34A60 34G20 PDFBibTeX XMLCite \textit{V. V. Goncharov}, Differ. Uravn. 27, No. 12, 2058--2065 (1991; Zbl 0741.34004)
Krasovskij, N. N.; Kudryavtsev, L. D.; Leonov, G. A.; Osipov, Yu. S.; Pilyugin, S. Yu. Viktor Aleksandrovich Pliss (on his sixtieth birthday). (Russian) Zbl 0736.01009 Differ. Uravn. 27, No. 12, 2186-2189 (1991). MSC: 01A70 01A65 PDFBibTeX XMLCite \textit{N. N. Krasovskij} et al., Differ. Uravn. 27, No. 12, 2186--2189 (1991; Zbl 0736.01009)
Mustafin, M. A. The Muckenhoupt condition and the V. A. Il’in condition in the problem of basis property of systems of exponential functions. (Russian) Zbl 0742.34072 Differ. Uravn. 27, No. 12, 2183-2185 (1991). Reviewer: W.Okrasiński (Wrocław) MSC: 34L10 34A30 PDFBibTeX XMLCite \textit{M. A. Mustafin}, Differ. Uravn. 27, No. 12, 2183--2185 (1991; Zbl 0742.34072)
Uteshev, A. Yu. Calculation of the Kronecker-Poincaré index of algebraic curves with respect to algebraic fields on the plane. (Russian) Zbl 0742.34006 Differ. Uravn. 27, No. 12, 2181-2183 (1991). Reviewer: M.Švec (Bratislava) MSC: 34A25 PDFBibTeX XMLCite \textit{A. Yu. Uteshev}, Differ. Uravn. 27, No. 12, 2181--2183 (1991; Zbl 0742.34006)
Sumin, M. I. On the first variation in the theory of optimal control of systems with distributed parameters. (Russian) Zbl 0748.49018 Differ. Uravn. 27, No. 12, 2179-2181 (1991). Reviewer: E.Iwanow (Wien) MSC: 49K20 PDFBibTeX XMLCite \textit{M. I. Sumin}, Differ. Uravn. 27, No. 12, 2179--2181 (1991; Zbl 0748.49018)
Rudakov, V. P. On a generalization of the Eshukov boundary value problem. (Russian) Zbl 0744.34061 Differ. Uravn. 27, No. 12, 2177-2178 (1991). Reviewer: Peetru Craciunas (Iaşi) MSC: 34G20 PDFBibTeX XMLCite \textit{V. P. Rudakov}, Differ. Uravn. 27, No. 12, 2177--2178 (1991; Zbl 0744.34061)
Pimenov, V. G. On the existence of generalized optimal controls in systems with delay in the control. (Russian) Zbl 0752.49001 Differ. Uravn. 27, No. 12, 2174-2176 (1991). Reviewer: E.G.Al’brekht (Chaterinburg) MSC: 49J15 PDFBibTeX XMLCite \textit{V. G. Pimenov}, Differ. Uravn. 27, No. 12, 2174--2176 (1991; Zbl 0752.49001)
Pavlov, G. A. On the uniqueness of the solution of an external inverse potential problem in convex domains. (Russian) Zbl 0747.31002 Differ. Uravn. 27, No. 12, 2172-2174 (1991). Reviewer: V.Ionescu (Bucureşti) MSC: 31A25 35R30 PDFBibTeX XMLCite \textit{G. A. Pavlov}, Differ. Uravn. 27, No. 12, 2172--2174 (1991; Zbl 0747.31002)
Nguyen Minh Chuong; Nguyen Van Kinh Regularization of variational inequalities with perturbed nonmonotone and discontinuous operators. (Russian) Zbl 0754.47045 Differ. Uravn. 27, No. 12, 2171-2172 (1991). Reviewer: P.Zabreiko (Minsk) MSC: 47J20 47H05 58E35 PDFBibTeX XMLCite \textit{Nguyen Minh Chuong} and \textit{Nguyen Van Kinh}, Differ. Uravn. 27, No. 12, 2171--2172 (1991; Zbl 0754.47045)
Minyuk, S. A. On the theory of complete controllability of systems with aftereffect involving constraints on the control. (Russian) Zbl 0782.93015 Differ. Uravn. 27, No. 12, 2169-2170 (1991). Reviewer: T.F.Filippova (Sverdlovsk) MSC: 93B05 PDFBibTeX XMLCite \textit{S. A. Minyuk}, Differ. Uravn. 27, No. 12, 2169--2170 (1991; Zbl 0782.93015)
Ershov, E. K. On the number of cycles of some differential equations on a two- dimensional torus. (Russian) Zbl 0773.34023 Differ. Uravn. 27, No. 12, 2167-2169 (1991). Reviewer: G.Sviridyuk (Chelyabinsk) MSC: 34C05 34C40 37G15 PDFBibTeX XMLCite \textit{E. K. Ershov}, Differ. Uravn. 27, No. 12, 2167--2169 (1991; Zbl 0773.34023)
Dubrovskij, V. V. Abstract formulae for regularized traces of elliptic smooth differential operators given on compact manifolds. (Russian) Zbl 0763.47019 Differ. Uravn. 27, No. 12, 2164-2166 (1991). Reviewer: R.Kodnár (Bratislava) MSC: 47F05 35J15 47B39 PDFBibTeX XMLCite \textit{V. V. Dubrovskij}, Differ. Uravn. 27, No. 12, 2164--2166 (1991; Zbl 0763.47019)
Baskakov, A. G. Spectral properties of the differential operator \({d\over{} dt}-A_ 0\) with unbounded operator \(A_ 0\). (Russian) Zbl 0752.34043 Differ. Uravn. 27, No. 12, 2162-6164 (1991). Reviewer: M.Greguš (Bratislava) MSC: 34L05 34G10 PDFBibTeX XMLCite \textit{A. G. Baskakov}, Differ. Uravn. 27, No. 12, 2162--6164 (1991; Zbl 0752.34043)