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 Ordinary Differential Equations The comparison method and investigation of the stability of systems of ordinary differential equations containing perturbations. IIO. V. Anashkin, M. M. Khapaev 187 Second-order kindred linear differential equationsL. M. Berkovich 192 Nonnegativity of the Cauchy matrix and the stability of a system of linear differential equations with retarded argumentA. I. Domoshnitskii, M. V. Sheina 201 Linear systems with nonregularity sets of full measureE. K. Makarov 209 Investigation of the existence and convexity of limit cycles by the method of generalized Lyapunov functionsYu. V. Malyshev, V. P. Zakharov 212 An analogue of a theorem of HartmanD. D. Mirzov 216 Eigenvalues of boundary value problems. Transformations of boundary value problems to boundary value problems with small coefficientsV. S. Mokeichev 222 A priori estimation of the length of a closed trajectory on a planeV. P. Nozdracheva 229 On exponential dichotomy with maximal index and on uniform strong positivity of a family of automorphisms of a vector bundleM. I. Rakhimberdiev 234 Linearization of an autonomous system in a neighborhood of a saddle singular pointV. S. Samovol 240 A singularly perturbed differential equation with a Fredholm operator multiplying the derivativeV. A. Sobolev, K. I. Chernyshov 247 Partial Differential Equations The third boundary value problem for degenerate linear elliptic equationsM. I. Aliev 259 Spatial singularities of high-mode bifurcations of two-component systems with small diffusionS. A. Kashchenko 262 Boundary value problems for third-order parabolic-hyperbolic equations with a noncharacteristic line of change of typeM. Mamazhanov, D. Khalmuratov 271 Local solvability of some multidimensional inverse problems for equations of hyperbolic typeV. G. Romanov 275 The homogeneous Keldysh–Sedov problem for multiply connected circular domains in the Muskhelishvili class $h_0$A. S. Sorokin 283 Connection formulas for spheroidal functions in different coordinate systemsM. V. Fedoryuk 294 Integral Equations and Integral-Differential The generalized Hilbert operatorI. K. Lifanov, L. N. Poltavskii 300 Solvability in closed form of a class of complete singular integral equationsNguen Van Mau 307 Solutions of a class of nonlinear singular integro-differential equations with a shiftR. Sh. Khusnutdinov 311 Asymptotic estimates for the solutions of the renewal equationZ. B. Tsalyuk 320 An integro-differential operator of potential theoryA. Yanushauskas 325 Short Communications Estimates of the solution of a half-space initial-boundary value problem for a system of equations of elliptic-parabolic type in $W_p^l$-classesM. A. Abdrachmanov 330 Ìåòîä ôóíêöèé Ëÿïóíîâà è îáîáùåííàÿ íåïðåðûâíàÿ çàâèñèìîñòü ðåøåíèé îò íà÷àëüíûõ äàííûõB. V. Zadvornyi 332 On the bifurcation of the separatrix connecting two equilibrium statesV. S. Medvedev 332 Necessary conditions for stability of characteristic Lyapunov exponents of linear differential systems in case of exponentially decreasing perturbationsA. M. Nurmatov 335 On the connection between the Liouville equation and the superradiative cascade equationA. A. Samodurov 337 A problem of ShowalterG. A. Sviridyuk 338 Generalized solutions of integral equations of the first kind with weak singularities on closed surfacesS. I. Smagin 340 Removable singularities of Hölder solutions of elliptic systemsN. N. Tarkhanov 341 On analytic solutions of the Korteweg–de Vries equation represented by exponential seriesS. S. Titov 343 A method for constructing a solution of the two-dimensional nonlinear Poisson equationI. E. Tralle 343 Some integral operators in the theory of generalized analytic functionsA. Tungatarov 345 A nonlocal problem for an analytic function in a doubly connected domainT. V. Chekmarev 348 Limit cycles of a quadratic system of differential equations in the presence of an integral lineR. M. Mints 351 An algorithm for constructing a regularized asymptotic solution of a nonlinear singularly perturbed boundary value problem in the resonance caseV. A. Strizhkov 352 The unconditional basis property of root vectors of loaded operatorsV. V. Tikhomirov 355 Exponential stability of linear systems with delayD. Ya. Khusainov 357