Edit Profile (opens in new tab) Il’kiv, Volodymyr Stepanovych Co-Author Distance Author ID: ilkiv.volodymyr-stepanovich Published as: Il’kiv, V. S.; Il’kiv, Volodymyr; Ilkiv, V. S.; Il’kiv, Volodymyr S.; Il’kiv, V.; Il’kiv, Volodymyr Stepanovich; Il’Kiv, Volodymyr S. more...less External Links: Math-Net.Ru Documents Indexed: 83 Publications since 1978 Co-Authors: 24 Co-Authors with 59 Joint Publications 227 Co-Co-Authors all top 5 Co-Authors 24 single-authored 15 Nytrebych, Zinovii Mykolaiovych 15 Strap, Nataliya Igorivna 12 Volyanska, Iryna I. 11 Pukach, Petro Ya. 7 Ptashnyk, Bogdan Ĭosypovych 6 Magerovs’ka, T. V. 6 Malanchuk, Oksana Mykhailivna 4 Savka, Ivan Ya. 4 Symotyuk, M. M. 3 Polishchuk, V. N. 2 Kalenyuk, Petro I. 2 Magerovska, Tetyana 2 Pakholok, B. V. 1 Dubinskiĭ, Yuliĭ Andreevich 1 Gorbachuk, Myroslav L’vovych 1 Khomyak, D. V. 1 Kogut, I. V. 1 Maherovska, T. V. 1 Pelekh, Ya. M. 1 Salyga, B. O. 1 Slonovs’kyĭ, Yaroslav 1 Volians’ka, I. I. 1 Vovk, M. I. 1 Vovk, Myroslava all top 5 Serials 11 Matematychni Metody ta Fizyko-Mekhanichni Polya 10 Visnyk Derzhavnogo Universytetu L’vivs’ka Politekhnika 6 Ukrainian Mathematical Journal 6 Matematychni Studiï 6 Bukovyns’kyĭ Matematychnyĭ Zhurnal 5 Journal of Mathematical Sciences (New York) 4 Ukraïns’kyĭ Matematychnyĭ Zhurnal 4 Carpathian Mathematical Publications 3 Differential Equations 3 Visnyk L’vivs’kogo Universytetu. Seriya Mekhaniko-Matematychna 3 Matematychnyĭ Visnyk Naukovogo Tovarystva Im. Shevchenka 2 Electronic Journal of Differential Equations (EJDE) 2 Nonlinear Boundary Value Problems 2 Visnyk Natsional’nogo Universytetu L’vivs’ka Politekhnika. Fizyko-Matematychni Nauky 2 Zbirnyk Prats’ Instytutu Matematyky NAN Ukraïny 1 Doklady Akademii Nauk Ukrainskoĭ SSR, Seriya A 1 Sibirskiĭ Matematicheskiĭ Zhurnal 1 Turkish Journal of Mathematics 1 Opuscula Mathematica 1 Naukovyĭ Visnyk Uzhgorods’kogo Universytetu. Seriya Matematyka 1 Italian Journal of Pure and Applied Mathematics 1 Dopovidi Natsional’noï Akademiï Nauk Ukraïny. Matematyka, Pryrodoznavstvo, Tekhnichni Nauky 1 Differential Equations 1 Naukovyĭ Visnyk Chernivets’kogo Universytetu. Matematyka 1 Kragujevac Journal of Mathematics 1 Azerbaijan Journal of Mathematics all top 5 Fields 73 Partial differential equations (35-XX) 7 Ordinary differential equations (34-XX) 6 Operator theory (47-XX) 5 Functional analysis (46-XX) 3 Real functions (26-XX) 3 Mechanics of deformable solids (74-XX) 2 Number theory (11-XX) 2 Several complex variables and analytic spaces (32-XX) 1 History and biography (01-XX) 1 Measure and integration (28-XX) 1 Potential theory (31-XX) 1 Dynamical systems and ergodic theory (37-XX) 1 Approximations and expansions (41-XX) 1 Calculus of variations and optimal control; optimization (49-XX) 1 Global analysis, analysis on manifolds (58-XX) Publications by Year all cited Publications top 5 cited Publications Citations contained in zbMATH Open 26 Publications have been cited 90 times in 65 Documents Cited by ▼ Year ▼ A problem with nonlocal boundary conditions for systems of partial differential equations with constant coefficients. Zbl 0556.35013 Il’kiv, V. S.; Ptashnik, B. I. 21 1984 Problems for partial differential equations with nonlocal conditions. Metric approach to the problem of small denominators. Zbl 1114.35001 Il’kiv, V. S.; Ptashnyk, B. I. 11 2006 Boundary-value problems with integral conditions for a system of Lamé equations in the space of almost periodic functions. Zbl 1353.35049 Il’Kiv, Volodymyr S.; Nytrebych, Zinovii M.; Pukach, Petro Ya. 9 2016 An ill-posed nonlocal two-point problem for systems of partial differential equations. Zbl 1081.35131 Il’kiv, V. S.; Ptashnik, B. I. 8 2005 Homogeneous problem with two-point conditions in time for some equations of mathematical physics. Zbl 1373.35092 Nytrebych, Z. M.; Malanchuk, O. M.; Il’kiv, V. S.; Pukach, P. Ya. 5 2017 On the solvability of two-point in time problem for PDE. Zbl 1391.35005 Nytrebych, Zinovii; Malanchuk, Oksana; Il’kiv, Volodymyr; Pukach, Petro 5 2017 Solvability of the nonlocal boundary-value problem for a system of differential-operator equations in the Sobolev scale of spaces and in a refined scale. Zbl 1348.35302 Il’kiv, V. S.; Strap, N. I. 4 2015 Incorrect nonlocal boundary value problem for partial differential equations. Zbl 1091.35111 Il’kiv, Volodymyr 3 2004 On nontrivial solutions of homogeneous Dirichlet problem for partial differential equations in a layer. Zbl 1488.35178 Nytrebych, Z.; Il’kiv, V.; Pukach, P.; Malanchuk, O. 3 2018 Nonlocal problem with moment conditions for hyperbolic equations. Zbl 1386.35268 Il’kiv, Volodymyr S.; Nytrebych, Zinovii M.; Pukach, Petro Ya. 2 2017 Solvability conditions for the nonlocal boundary-value problem for a differential-operator equation with weak nonlinearity in the refined Sobolev scale of spaces of functions of many real variables. Zbl 1452.35129 Il’kiv, V. S.; Strap, N. I.; Volyanska, I. I. 2 2020 Two-point nonlocal problem for a weak nonlinear differential operator equation. Zbl 1414.35048 Volyanska, I.; Il’kiv, V.; Strap, N. 2 2018 On nonexistence of global in time solution for a mixed problem for a nonlinear evolution equation with memory generalizing the Voigt-Kelvin rheological model. Zbl 1402.35088 Pukach, Petro; Il’kiv, Volodymyr; Nytrebych, Zinovii; Vovk, Myroslava 2 2017 A nonlocal multipoint problem for pseudodifferential operators with analytic symbols. Zbl 0628.35090 Il’kiv, V. S.; Polishchuk, V. N.; Ptashnik, B. I.; Salyga, B. O. 1 1986 A nonlocal boundary-value problem for partial differential equations of infinite order. Zbl 0537.35017 Il’kiv, V. S. 1 1983 A non-local boundary value problem for infinite order partial differential equations. Zbl 0542.35016 Il’kiv, V. S. 1 1983 Exact estimate for the measure of the level set of the modulus of a function with high-order constant-sign derivative. Zbl 1224.26017 Ilkiv, V. S.; Maherovska, T. V. 1 2010 Representation and investigation of solutions of a nonlocal boundary-value problem for a system of partial differential equations. Zbl 0936.35041 Il’kiv, V. S.; Ptashnyk, B. I. 1 1996 Analogues of Pyartli’s lemma with absolute constants. Zbl 1047.26500 Ilkiv, V. S. 1 1999 The formal initial value problem for differential equations with constant pseudo-differential coefficients. Zbl 0915.34055 Il’kiv, V. S. 1 1998 Solvability of nonlocal problem for a system of equations with partial derivatives and shifted arguments. Zbl 1249.35071 Il’kiv, V. S. 1 2010 Solvability conditions of non-local problems for differential equations with operator coefficients in the spaces of Dirichlet-Taylor series. Zbl 1313.35002 Il’kiv, V. S.; Strap, N. I. 1 2013 On solvability of non-local boundary value problem for differential-operator equation in refined Sobolev scale. Zbl 1313.58012 Il’kiv, V. S.; Strap, N. I. 1 2014 Unique solvability of the problem with integral conditions for partial differential equations of second order in time. Zbl 1289.35058 Kalenyuk, P. I.; Il’kiv, V. S.; Nytrebych, Z. M.; Kogut, I. V. 1 2013 Solvability of the nonlocal problem for linear nonhomogeneous system of partial differential equations with shifted arguments. Zbl 1289.35002 Il’kiv, V. S. 1 2011 The problem with integral conditions for second-order partial differential equations. Zbl 1289.35059 Il’kiv, V. S.; Magerovs’ka, T. V. 1 2008 Solvability conditions for the nonlocal boundary-value problem for a differential-operator equation with weak nonlinearity in the refined Sobolev scale of spaces of functions of many real variables. Zbl 1452.35129 Il’kiv, V. S.; Strap, N. I.; Volyanska, I. I. 2 2020 On nontrivial solutions of homogeneous Dirichlet problem for partial differential equations in a layer. Zbl 1488.35178 Nytrebych, Z.; Il’kiv, V.; Pukach, P.; Malanchuk, O. 3 2018 Two-point nonlocal problem for a weak nonlinear differential operator equation. Zbl 1414.35048 Volyanska, I.; Il’kiv, V.; Strap, N. 2 2018 Homogeneous problem with two-point conditions in time for some equations of mathematical physics. Zbl 1373.35092 Nytrebych, Z. M.; Malanchuk, O. M.; Il’kiv, V. S.; Pukach, P. Ya. 5 2017 On the solvability of two-point in time problem for PDE. Zbl 1391.35005 Nytrebych, Zinovii; Malanchuk, Oksana; Il’kiv, Volodymyr; Pukach, Petro 5 2017 Nonlocal problem with moment conditions for hyperbolic equations. Zbl 1386.35268 Il’kiv, Volodymyr S.; Nytrebych, Zinovii M.; Pukach, Petro Ya. 2 2017 On nonexistence of global in time solution for a mixed problem for a nonlinear evolution equation with memory generalizing the Voigt-Kelvin rheological model. Zbl 1402.35088 Pukach, Petro; Il’kiv, Volodymyr; Nytrebych, Zinovii; Vovk, Myroslava 2 2017 Boundary-value problems with integral conditions for a system of Lamé equations in the space of almost periodic functions. Zbl 1353.35049 Il’Kiv, Volodymyr S.; Nytrebych, Zinovii M.; Pukach, Petro Ya. 9 2016 Solvability of the nonlocal boundary-value problem for a system of differential-operator equations in the Sobolev scale of spaces and in a refined scale. Zbl 1348.35302 Il’kiv, V. S.; Strap, N. I. 4 2015 On solvability of non-local boundary value problem for differential-operator equation in refined Sobolev scale. Zbl 1313.58012 Il’kiv, V. S.; Strap, N. I. 1 2014 Solvability conditions of non-local problems for differential equations with operator coefficients in the spaces of Dirichlet-Taylor series. Zbl 1313.35002 Il’kiv, V. S.; Strap, N. I. 1 2013 Unique solvability of the problem with integral conditions for partial differential equations of second order in time. Zbl 1289.35058 Kalenyuk, P. I.; Il’kiv, V. S.; Nytrebych, Z. M.; Kogut, I. V. 1 2013 Solvability of the nonlocal problem for linear nonhomogeneous system of partial differential equations with shifted arguments. Zbl 1289.35002 Il’kiv, V. S. 1 2011 Exact estimate for the measure of the level set of the modulus of a function with high-order constant-sign derivative. Zbl 1224.26017 Ilkiv, V. S.; Maherovska, T. V. 1 2010 Solvability of nonlocal problem for a system of equations with partial derivatives and shifted arguments. Zbl 1249.35071 Il’kiv, V. S. 1 2010 The problem with integral conditions for second-order partial differential equations. Zbl 1289.35059 Il’kiv, V. S.; Magerovs’ka, T. V. 1 2008 Problems for partial differential equations with nonlocal conditions. Metric approach to the problem of small denominators. Zbl 1114.35001 Il’kiv, V. S.; Ptashnyk, B. I. 11 2006 An ill-posed nonlocal two-point problem for systems of partial differential equations. Zbl 1081.35131 Il’kiv, V. S.; Ptashnik, B. I. 8 2005 Incorrect nonlocal boundary value problem for partial differential equations. Zbl 1091.35111 Il’kiv, Volodymyr 3 2004 Analogues of Pyartli’s lemma with absolute constants. Zbl 1047.26500 Ilkiv, V. S. 1 1999 The formal initial value problem for differential equations with constant pseudo-differential coefficients. Zbl 0915.34055 Il’kiv, V. S. 1 1998 Representation and investigation of solutions of a nonlocal boundary-value problem for a system of partial differential equations. Zbl 0936.35041 Il’kiv, V. S.; Ptashnyk, B. I. 1 1996 A nonlocal multipoint problem for pseudodifferential operators with analytic symbols. Zbl 0628.35090 Il’kiv, V. S.; Polishchuk, V. N.; Ptashnik, B. I.; Salyga, B. O. 1 1986 A problem with nonlocal boundary conditions for systems of partial differential equations with constant coefficients. Zbl 0556.35013 Il’kiv, V. S.; Ptashnik, B. I. 21 1984 A nonlocal boundary-value problem for partial differential equations of infinite order. Zbl 0537.35017 Il’kiv, V. S. 1 1983 A non-local boundary value problem for infinite order partial differential equations. Zbl 0542.35016 Il’kiv, V. S. 1 1983 all cited Publications top 5 cited Publications all top 5 Cited by 76 Authors 15 Il’kiv, Volodymyr Stepanovych 13 Nytrebych, Zinovii Mykolaiovych 7 Malanchuk, Oksana Mykhailivna 6 Strap, Nataliya Igorivna 6 Volyanska, Iryna I. 4 Assanova, Anar Turmaganbetkyzy 4 Gorodetskij, V. V. 4 Pukach, Petro Ya. 3 Burskii, Vladimir Petrovich 3 Horodets’kyi, V. V. 3 Kalenyuk, Petro I. 3 Kuduk, Gr. 3 Martynyuk, Olga V. 3 Savka, Ivan Ya. 3 Symotyuk, M. M. 2 Băleanu, Dumitru I. 2 Fedukh, O. V. 2 Kohut, I. V. 2 Luc, Nguyen Hoang 2 Nam, Danh Hua Quoc 2 Ptashnyk, Bogdan Ĭosypovych 2 Urmancheva, L. B. 2 Valitskij, Yu. N. 1 Agarwal, Ravi P. 1 Barral, Julien 1 Beresnevich, Victor V. 1 Borok, Valentina Mikhailovna 1 Buhrii, Nataliya V. 1 Buhrii, Oleh 1 Buryachenko, Kateryna Oleksandrivna 1 Can, Nguyen Huu 1 Dezin, Alekseĭ Alekseevich 1 Dodson, Michael Maurice 1 Dzhobulaeva, Zh. K. 1 Fardigola, Larissa V. 1 Fayazov, Kudratillo Sadridinovich 1 Figol’, V. V. 1 Gao, Dapeng 1 Goy, Taras P. 1 Huang, Nan-Jing 1 Imanchiev, Askarbek Ermekovich 1 Kang, Jum-Ran 1 Kang, Shin Min 1 Kenne, E. 1 Kiguradze, Tariel I. 1 Klyus, I. S. 1 Kmit, Irina 1 Kristensen, Simon 1 Lakshmikantham, Vangipuram 1 Levesley, Jason 1 Long, Le Dinh 1 Martynyuk, A. O. 1 Matijchuk, Mikhail Ivanovich 1 Mytropol’skyĭ, Yuriĭ Oleksiĭovych 1 Negrych, M. 1 Nguyen Huy Tuan 1 O’Regan, Donal 1 Petrishin, R. I. 1 Petryshyn, Roman I. 1 Polishchuk, V. N. 1 Rontó, Miklós 1 Salyga, B. O. 1 Seuret, Stéphane 1 Shirokovskikh, A. A. 1 Shyrokovs’kyĭ, A. O. 1 Tkach, B. P. 1 Tri, Vo Viet 1 Tymkiv, I. R. 1 Umarov, Sabir R. 1 Vasylyshyn, P. B. 1 Verezhak, A. P. 1 Verezhak, H. P. 1 Vovk, M. I. 1 Zadorozhna, N. M. 1 Zhang, Cong 1 Zinchenko, Tetiana N. all top 5 Cited in 24 Serials 14 Ukrainian Mathematical Journal 12 Journal of Mathematical Sciences (New York) 4 Siberian Mathematical Journal 4 Matematychni Metody ta Fizyko-Mekhanichni Polya 4 Carpathian Mathematical Publications 3 Differential Equations 2 Advances in Mathematics 2 Turkish Journal of Mathematics 2 Matematychni Studiï 2 Advances in Difference Equations 2 Boundary Value Problems 2 Nonlinear Oscillations 1 Applicable Analysis 1 Journal of Mathematical Analysis and Applications 1 Mathematical Notes 1 Periodica Mathematica Hungarica 1 Demonstratio Mathematica 1 Journal of Differential Equations 1 Mathematica Slovaca 1 Nonlinear Analysis. Theory, Methods & Applications. Series A: Theory and Methods 1 Computational and Applied Mathematics 1 Lobachevskii Journal of Mathematics 1 Asian-European Journal of Mathematics 1 Open Mathematics all top 5 Cited in 13 Fields 54 Partial differential equations (35-XX) 12 Ordinary differential equations (34-XX) 8 Operator theory (47-XX) 4 Number theory (11-XX) 3 Mechanics of deformable solids (74-XX) 2 Dynamical systems and ergodic theory (37-XX) 1 Real functions (26-XX) 1 Functions of a complex variable (30-XX) 1 Several complex variables and analytic spaces (32-XX) 1 Approximations and expansions (41-XX) 1 Functional analysis (46-XX) 1 Biology and other natural sciences (92-XX) 1 Systems theory; control (93-XX) Citations by Year