Edit Profile (opens in new tab) Sadyrbaev, Felix Zh. Co-Author Distance Author ID: sadyrbaev.felix-zh Published as: Sadyrbaev, Felix; Sadyrbaev, F.; Sadyrbaev, F. Zh.; Sadyrbaev, Felix Zh.; Sadyrbayev, F. Zh.; Sadirbayev, F. more...less External Links: ORCID Documents Indexed: 97 Publications since 1977 1 Contribution as Editor Co-Authors: 33 Co-Authors with 64 Joint Publications 594 Co-Co-Authors all top 5 Co-Authors 33 single-authored 16 Gritsans, Armands 12 Yermachenko, Inara 10 Atslega, Svetlana 4 Brokan, Eduard 4 Kirichuka, A. 4 Klokov, Yuriĭ Aleksandrovich 3 Dobkevich, Maria 3 Lepin, A. Ya 3 Sveikate, Nadezhda 2 Lepin, L. A. 2 Ogorodnikova, S. 1 Ad”yutov, M. M. 1 Diblík, Josef 1 Domoshnitsky, Alexander I. 1 Fedorova, G. I. 1 Finaskins, Dmitrijs 1 Gera, Milan 1 Henrard, Marc 1 Kiguradze, Ivan Tarielovich 1 Kiguradze, Tariel I. 1 Kozmina, Yelena 1 Kvinikadze, G. G. 1 Li, Tongxing 1 Lomtatidze, Alexander 1 Partsvania, Nino 1 Ponomarev, V. D. 1 Půža, Bedřich 1 Rogovchenko, Yuriy V. 1 Rozov, Nikolaĭ Khristovich 1 Sergejeva, Natalija 1 Vasil’ev, N. I. 1 Wang, Qiru 1 Zayakina, O. V. all top 5 Serials 14 Mathematical Modelling and Analysis 10 Latviĭskiĭ Matematicheskiĭ Ezhegodnik 5 Abstract and Applied Analysis 4 Nonlinear Analysis. Theory, Methods & Applications. Series A: Theory and Methods 4 Discrete and Continuous Dynamical Systems 3 Differential Equations 3 Tatra Mountains Mathematical Publications 3 Electronic Journal of Qualitative Theory of Differential Equations 3 Nonlinear Analysis. Modelling and Control 2 Mathematical Notes 2 International Journal of Mathematics and Mathematical Sciences 2 Journal of Mathematical Sciences (New York) 2 Latvijas Zinātņu Akadēmijas Vēstis. B Daļa 2 Nonlinear Analysis. Theory, Methods & Applications 1 Mathematical Methods in the Applied Sciences 1 Rocky Mountain Journal of Mathematics 1 Funkcialaj Ekvacioj. Serio Internacia 1 Mathematica Slovaca 1 Zeitschrift für Analysis und ihre Anwendungen 1 Acta Mathematica Universitatis Comenianae 1 Applied Mathematics Letters 1 Electronic Journal of Differential Equations (EJDE) 1 Zeszyty Naukowe Uniwersytetu Jagiellońskiego. Universitatis Iagellonicae Acta Mathematica 1 Georgian Mathematical Journal 1 Proceedings of the Latvian Academy of Sciences. Section B 1 Memoirs on Differential Equations and Mathematical Physics 1 Rapport. Séminaire de Mathématique. Nouvelle Série 1 Communications in Applied Analysis 1 Functional Differential Equations 1 Dynamics of Continuous, Discrete & Impulsive Systems. Series A. Mathematical Analysis 1 International Journal of Pure and Applied Mathematics 1 Studies of the University of Žilina. Mathematical Series 1 Miskolc Mathematical Notes 1 Differential Equations and Applications 1 International Journal of Differential Equations 1 International Journal of Analysis all top 5 Fields 92 Ordinary differential equations (34-XX) 7 Calculus of variations and optimal control; optimization (49-XX) 3 Biology and other natural sciences (92-XX) 2 Special functions (33-XX) 2 Operator theory (47-XX) 1 General and overarching topics; collections (00-XX) 1 History and biography (01-XX) 1 Partial differential equations (35-XX) 1 Dynamical systems and ergodic theory (37-XX) 1 Difference and functional equations (39-XX) 1 Fluid mechanics (76-XX) 1 Systems theory; control (93-XX) Publications by Year all cited Publications top 5 cited Publications Citations contained in zbMATH Open 50 Publications have been cited 126 times in 81 Documents Cited by ▼ Year ▼ Quasilinearization and multiple solutions of the Emden-Fowler type equation. Zbl 1084.34020Yermachenko, I.; Sadyrbaev, F. 19 2005 Types of solutions and multiplicity results for two-point nonlinear boundary value problems. Zbl 1224.34049Yermachenko, I.; Sadyrbaev, F. 9 2005 Multiplicity of solutions for two-point boundary value problems with asymptotically asymmetric nonlinearities. Zbl 0865.34012Sadyrbaev, F. 8 1996 Nonlinear fourth-order two-point boundary value problems. Zbl 0831.34030Sadyrbaev, Felix 7 1995 Extension of the example by Moore-Nehari. Zbl 1485.34091Gritsans, Armands; Sadyrbaev, Felix 7 2015 Multiple solutions of a third order boundary value problem. Zbl 0755.34017Gera, Milan; Sadyrbaev, Felix 5 1992 Two-point boundary value problems with monotonically boundary conditions for one-dimensional \(\varphi\)-Laplacian equations. Zbl 1084.34017Lepin, A. Ja.; Lepin, L. A.; Sadyrbaev, F. Zh. 4 2005 The upper and lower functions method for second order systems. Zbl 0986.34013Lepin, A. Ja.; Sadyrbaev, F. Zh. 3 2001 Multiple solutions of nonlinear boundary value problems with oscillatory solutions. Zbl 1134.34008Ogorodnikova, S.; Sadyrbaev, F. 3 2006 On solutions of a boundary value problem for a second order ordinary differential equation. Zbl 0707.34017Sadyrbaev, F. Zh. 3 1988 Dirichlet boundary value problem for the second order asymptotically linear system. Zbl 1356.34031Gritsans, A.; Sadyrbaev, F.; Yermachenko, I. 3 2016 Quasilinearization technique for \(\Phi\)-Laplacian type equations. Zbl 1254.34037Yermachenko, Inara; Sadyrbaev, Felix 3 2012 Lyapunov functions and the solvability of the first boundary-value problem for ordinary second-order differential equations. Zbl 0475.34012Sadyrbaev, F. Zh. 2 1980 Nonlinear spectra for parameter dependent ordinary differential equations. Zbl 1298.34037Sadyrbaev, F.; Gritsans, A. 2 2007 On periodic solutions of Liénard type equations. Zbl 1330.34048Atslega, Svetlana; Sadyrbaev, Felix 2 2013 Multiple positive solutions for the Dirichlet boundary value problems by phase plane analysis. Zbl 1347.34042Kirichuka, A.; Sadyrbaev, F. 2 2015 Multiple period annuli in Liénard type equations. Zbl 1205.34029Atslega, S.; Sadyrbaev, F. 2 2010 On a two-point boundary value problem for a second order ordinary differential equation. Zbl 0624.34015Virzhbitskij, Ya. V.; Sadyrbaev, F. Zh. 2 1986 On a maximal number of period annuli. Zbl 1210.34046Kozmina, Yelena; Sadyrbaev, Felix 2 2011 Multiplicity results for two-point nonlinear boundary value problems. Zbl 1386.34044Yermachenko, I.; Sadyrbaev, F. 2 2006 Planar systems with critical points: Multiple solutions of two-point nonlinear boundary value problems. Zbl 1159.34311Ogorodnikova, S.; Sadyrbaev, F. 2 2005 Multiple solutions of two-point nonlinear boundary value problems. Zbl 1238.34039Sadyrbaev, Felix; Yermachenko, Inara 2 2009 On the number of solutions of a two-point nonlinear boundary value problem. Zbl 0702.34026Sadyrbaev, F. Zh. 2 1988 Period annuli and positive solutions of nonlinear boundary value problems. Zbl 1269.34028Atslega, S.; Sadyrbaev, F. 2 2010 On a problem for a system of two the second order differential equations via the theory of vector fields. Zbl 1420.34047Yermachenko, Inara; Sadyrbaev, Felix 2 2015 A two-point boundary value problem for third order asymptotically linear systems. Zbl 1438.34089Gritsans, Armands; Sadyrbaev, Felix 2 2019 On types of solutions of the second order nonlinear boundary value problems. Zbl 1474.34138Dobkevich, Maria; Sadyrbaev, Felix; Sveikate, Nadezhda; Yermachenko, Inara 1 2014 On boundary value problem for equations with cubic nonlinearity and step-wise coefficient. Zbl 1415.34053Kirichuka, A.; Sadyrbaev, F. 1 2018 Attraction in \(n\)-dimensional differential systems from network regulation theory. Zbl 1407.34061Brokan, Eduard; Sadyrbaev, Felix 1 2018 Level surfaces of Lyapunov functions and solvability of a two-point boundary value problem. Zbl 0473.34007Sadyrbaev, F. Zh. 1 1980 On a two-point boundary value problem for a system of first-order ordinary differential equations. Zbl 0487.34013Sadyrbaev, F. Zh. 1 1979 Remark on methods of estimating the number of solutions of nonlinear boundary value problems for ordinary differential equations. Zbl 0853.34027Sadyrbaev, F. Zh. 1 1995 Ważewski method and upper and lower functions for higher-order ordinary differential equations. Zbl 1002.34012Sadyrbaev, Felix 1 1998 Regularity of solutions in the fundamental problem of the classical calculus of variations. Zbl 0807.49033Sadyrbaev, F. Zh. 1 1992 Recent progress in investigation of several problems in nonlinear boundary value problems for ordinary differential equations. Zbl 0822.34031Lepin, A.; Ponomarev, V.; Sadyrbaev, F. 1 1993 Quasilinearization of resonant boundary-value problems with mixed boundary conditions. Zbl 1320.34023Sveikate, N.; Sadyrbaev, F. 1 2015 Solutions of an Emden-Fowler equation. Zbl 0817.34011Sadyrbaev, F. Zh. 1 1989 Dirichlet boundary value problem for a system of \(n\) second-order asymptotically asymmetric differential equations. Zbl 1383.34040Gritsans, Armands; Sadyrbaev, Felix; Yermachenko, Inara 1 2018 Characteristic numbers of non-autonomous Emden-Fowler type equations. Zbl 1107.34024Gritsans, A.; Sadyrbaev, F. 1 2006 Sharp conditions for rapid nonlinear oscillations. Zbl 0952.34010Klokov, Yu. A.; Sadyrbaev, F. Zh. 1 2000 Period annuli in the Liénard type equation. Zbl 1157.34316Atslega, S.; Sadyrbaev, F. 1 2008 Multiplicity of solutions for second order two-point boundary value problems with asymptotically asymmetric nonlinearities at resonance. Zbl 1130.34011Sadyrbaev, Felix 1 2007 Nonlinear spectra: the Neumann problem. Zbl 1177.34105Gritsans, A.; Sadyrbaev, F. 1 2009 On nonlinear Fučik type spectra. Zbl 1162.34012Gritsans, A.; Sadyrbaev, F. 1 2008 Multiplicity in parameter-dependent problems for ordinary differential equations. Zbl 1193.34030Sadyrbaev, F. 1 2009 Types of solutions and multiplicity results for second order nonlinear boundary value problems. Zbl 1163.34323Yermachenko, Inara; Sadyrbaev, Felix 1 2007 Multiple solutions of the second order nonlinear Neumann BVP. Zbl 1184.34048Atslega, Svetlana; Sadyrbaev, Felix 1 2009 Types and multiplicity of solutions to Sturm-Liouville boundary value problem. Zbl 1488.34201Dobkevich, Maria; Sadyrbaev, Felix 1 2015 On solvability of boundary value problem for asymmetric differential equation depending on \(x'\). Zbl 1275.34023Gritsans, Armands; Sadyrbaev, Felix 1 2013 On a differential system arising in the network control theory. Zbl 1416.93015Brokan, Eduard; Sadyrbaev, Felix 1 2016 A two-point boundary value problem for third order asymptotically linear systems. Zbl 1438.34089Gritsans, Armands; Sadyrbaev, Felix 2 2019 On boundary value problem for equations with cubic nonlinearity and step-wise coefficient. Zbl 1415.34053Kirichuka, A.; Sadyrbaev, F. 1 2018 Attraction in \(n\)-dimensional differential systems from network regulation theory. Zbl 1407.34061Brokan, Eduard; Sadyrbaev, Felix 1 2018 Dirichlet boundary value problem for a system of \(n\) second-order asymptotically asymmetric differential equations. Zbl 1383.34040Gritsans, Armands; Sadyrbaev, Felix; Yermachenko, Inara 1 2018 Dirichlet boundary value problem for the second order asymptotically linear system. Zbl 1356.34031Gritsans, A.; Sadyrbaev, F.; Yermachenko, I. 3 2016 On a differential system arising in the network control theory. Zbl 1416.93015Brokan, Eduard; Sadyrbaev, Felix 1 2016 Extension of the example by Moore-Nehari. Zbl 1485.34091Gritsans, Armands; Sadyrbaev, Felix 7 2015 Multiple positive solutions for the Dirichlet boundary value problems by phase plane analysis. Zbl 1347.34042Kirichuka, A.; Sadyrbaev, F. 2 2015 On a problem for a system of two the second order differential equations via the theory of vector fields. Zbl 1420.34047Yermachenko, Inara; Sadyrbaev, Felix 2 2015 Quasilinearization of resonant boundary-value problems with mixed boundary conditions. Zbl 1320.34023Sveikate, N.; Sadyrbaev, F. 1 2015 Types and multiplicity of solutions to Sturm-Liouville boundary value problem. Zbl 1488.34201Dobkevich, Maria; Sadyrbaev, Felix 1 2015 On types of solutions of the second order nonlinear boundary value problems. Zbl 1474.34138Dobkevich, Maria; Sadyrbaev, Felix; Sveikate, Nadezhda; Yermachenko, Inara 1 2014 On periodic solutions of Liénard type equations. Zbl 1330.34048Atslega, Svetlana; Sadyrbaev, Felix 2 2013 On solvability of boundary value problem for asymmetric differential equation depending on \(x'\). Zbl 1275.34023Gritsans, Armands; Sadyrbaev, Felix 1 2013 Quasilinearization technique for \(\Phi\)-Laplacian type equations. Zbl 1254.34037Yermachenko, Inara; Sadyrbaev, Felix 3 2012 On a maximal number of period annuli. Zbl 1210.34046Kozmina, Yelena; Sadyrbaev, Felix 2 2011 Multiple period annuli in Liénard type equations. Zbl 1205.34029Atslega, S.; Sadyrbaev, F. 2 2010 Period annuli and positive solutions of nonlinear boundary value problems. Zbl 1269.34028Atslega, S.; Sadyrbaev, F. 2 2010 Multiple solutions of two-point nonlinear boundary value problems. Zbl 1238.34039Sadyrbaev, Felix; Yermachenko, Inara 2 2009 Nonlinear spectra: the Neumann problem. Zbl 1177.34105Gritsans, A.; Sadyrbaev, F. 1 2009 Multiplicity in parameter-dependent problems for ordinary differential equations. Zbl 1193.34030Sadyrbaev, F. 1 2009 Multiple solutions of the second order nonlinear Neumann BVP. Zbl 1184.34048Atslega, Svetlana; Sadyrbaev, Felix 1 2009 Period annuli in the Liénard type equation. Zbl 1157.34316Atslega, S.; Sadyrbaev, F. 1 2008 On nonlinear Fučik type spectra. Zbl 1162.34012Gritsans, A.; Sadyrbaev, F. 1 2008 Nonlinear spectra for parameter dependent ordinary differential equations. Zbl 1298.34037Sadyrbaev, F.; Gritsans, A. 2 2007 Multiplicity of solutions for second order two-point boundary value problems with asymptotically asymmetric nonlinearities at resonance. Zbl 1130.34011Sadyrbaev, Felix 1 2007 Types of solutions and multiplicity results for second order nonlinear boundary value problems. Zbl 1163.34323Yermachenko, Inara; Sadyrbaev, Felix 1 2007 Multiple solutions of nonlinear boundary value problems with oscillatory solutions. Zbl 1134.34008Ogorodnikova, S.; Sadyrbaev, F. 3 2006 Multiplicity results for two-point nonlinear boundary value problems. Zbl 1386.34044Yermachenko, I.; Sadyrbaev, F. 2 2006 Characteristic numbers of non-autonomous Emden-Fowler type equations. Zbl 1107.34024Gritsans, A.; Sadyrbaev, F. 1 2006 Quasilinearization and multiple solutions of the Emden-Fowler type equation. Zbl 1084.34020Yermachenko, I.; Sadyrbaev, F. 19 2005 Types of solutions and multiplicity results for two-point nonlinear boundary value problems. Zbl 1224.34049Yermachenko, I.; Sadyrbaev, F. 9 2005 Two-point boundary value problems with monotonically boundary conditions for one-dimensional \(\varphi\)-Laplacian equations. Zbl 1084.34017Lepin, A. Ja.; Lepin, L. A.; Sadyrbaev, F. Zh. 4 2005 Planar systems with critical points: Multiple solutions of two-point nonlinear boundary value problems. Zbl 1159.34311Ogorodnikova, S.; Sadyrbaev, F. 2 2005 The upper and lower functions method for second order systems. Zbl 0986.34013Lepin, A. Ja.; Sadyrbaev, F. Zh. 3 2001 Sharp conditions for rapid nonlinear oscillations. Zbl 0952.34010Klokov, Yu. A.; Sadyrbaev, F. Zh. 1 2000 Ważewski method and upper and lower functions for higher-order ordinary differential equations. Zbl 1002.34012Sadyrbaev, Felix 1 1998 Multiplicity of solutions for two-point boundary value problems with asymptotically asymmetric nonlinearities. Zbl 0865.34012Sadyrbaev, F. 8 1996 Nonlinear fourth-order two-point boundary value problems. Zbl 0831.34030Sadyrbaev, Felix 7 1995 Remark on methods of estimating the number of solutions of nonlinear boundary value problems for ordinary differential equations. Zbl 0853.34027Sadyrbaev, F. Zh. 1 1995 Recent progress in investigation of several problems in nonlinear boundary value problems for ordinary differential equations. Zbl 0822.34031Lepin, A.; Ponomarev, V.; Sadyrbaev, F. 1 1993 Multiple solutions of a third order boundary value problem. Zbl 0755.34017Gera, Milan; Sadyrbaev, Felix 5 1992 Regularity of solutions in the fundamental problem of the classical calculus of variations. Zbl 0807.49033Sadyrbaev, F. Zh. 1 1992 Solutions of an Emden-Fowler equation. Zbl 0817.34011Sadyrbaev, F. Zh. 1 1989 On solutions of a boundary value problem for a second order ordinary differential equation. Zbl 0707.34017Sadyrbaev, F. Zh. 3 1988 On the number of solutions of a two-point nonlinear boundary value problem. Zbl 0702.34026Sadyrbaev, F. Zh. 2 1988 On a two-point boundary value problem for a second order ordinary differential equation. Zbl 0624.34015Virzhbitskij, Ya. V.; Sadyrbaev, F. Zh. 2 1986 Lyapunov functions and the solvability of the first boundary-value problem for ordinary second-order differential equations. Zbl 0475.34012Sadyrbaev, F. Zh. 2 1980 Level surfaces of Lyapunov functions and solvability of a two-point boundary value problem. Zbl 0473.34007Sadyrbaev, F. Zh. 1 1980 On a two-point boundary value problem for a system of first-order ordinary differential equations. Zbl 0487.34013Sadyrbaev, F. Zh. 1 1979 all cited Publications top 5 cited Publications all top 5 Cited by 76 Authors 23 Sadyrbaev, Felix Zh. 6 Yermachenko, Inara 5 Kajikiya, Ryuji 5 Kirichuka, A. 5 Wang, Guangwa 5 Zhou, Mingru 4 Agarwal, Ravi P. 4 Gritsans, Armands 4 O’Regan, Donal 4 Sveikate, Nadezhda 4 Yan, Baoqiang 3 Dobkevich, Maria 3 Eloe, Paul W. 3 Sun, Li 2 Ahmad, Bashir 2 Atslega, Svetlana 2 Dalbono, Francesca 2 Jonnalagadda, Jagan Mohan 2 Lepin, A. Ya 2 Lepin, L. A. 2 Li, Sun 2 Rovderová, Eva 2 Rynne, Bryan P. 2 Somora, Peter 1 Alanazi, Kareem 1 Alshammari, Meshal 1 Amster, Pablo 1 Anderson, Douglas Robert 1 Belikova, K. 1 Binding, Paul Anthony 1 Brokan, Eduard 1 Cabada, Alberto 1 Capietto, Anna 1 Cheng, Zhibo 1 Cid, José Ángel 1 Davis, John M. 1 Dunbar, Michelle 1 Fabry, Christian 1 Fonda, Alessandro 1 Gera, Milan 1 Habets, Patrick 1 Hamilton, Andrew J. S. 1 Henrard, Marc 1 Jankowski, Tadeusz 1 Kozmina, Yelena 1 Kuna, Mariel Paula 1 Lepin, Arnold Y. 1 Lepin, Leonid 1 López-Gómez, Julián 1 López-Pouso, Óscar 1 López Pouso, Rodrigo 1 Lu, Youmin 1 Mariani, Maria Cristina 1 Muñoz-Hernández, Eduardo 1 Nieto Roig, Juan Jose 1 Nkashama, Mubenga N. 1 Pašić, Mervan 1 Portaluri, Alessandro 1 Qin, Huizeng 1 Ronto, Andrei 1 Rontó, Miklós 1 Sȩdziwy, Stanisław 1 SenGupta, Indranil 1 Sergejeva, Natalija 1 Sidhu, Harvinder Singh 1 Sidhu, Leesa Ann 1 Sim, Inbo 1 Sychev, Mikhail A. 1 Tanaka, Satoshi 1 Toader, Rodica 1 Vasilyev, Nickolay 1 Waters, Edward K. 1 Xin, Yun 1 Yang, Xiaojing 1 Zanolin, Fabio 1 Zhang, Yongxin all top 5 Cited in 40 Serials 6 Abstract and Applied Analysis 6 Mathematical Modelling and Analysis 4 Journal of Mathematical Analysis and Applications 4 International Journal of Mathematics and Mathematical Sciences 4 Nonlinear Analysis. Theory, Methods & Applications. Series A: Theory and Methods 4 Nonlinear Analysis. Theory, Methods & Applications 3 Applied Mathematics and Computation 3 Mathematica Slovaca 3 Journal of Mathematical Sciences (New York) 3 Discrete and Continuous Dynamical Systems 2 Rocky Mountain Journal of Mathematics 2 Journal of Differential Equations 2 Electronic Journal of Differential Equations (EJDE) 2 NoDEA. Nonlinear Differential Equations and Applications 2 Differential Equations 2 Nonlinear Analysis. Real World Applications 2 Advances in Difference Equations 2 Boundary Value Problems 1 Lithuanian Mathematical Journal 1 Mathematical Notes 1 Bulletin of Mathematical Biology 1 Journal of the Mathematical Society of Japan 1 Monatshefte für Mathematik 1 Siberian Mathematical Journal 1 Zeitschrift für Analysis und ihre Anwendungen 1 Acta Applicandae Mathematicae 1 Applied Mathematics Letters 1 Applications of Mathematics 1 Tatra Mountains Mathematical Publications 1 Topological Methods in Nonlinear Analysis 1 Georgian Mathematical Journal 1 Functional Differential Equations 1 Differential Equations and Dynamical Systems 1 Positivity 1 Journal of Inequalities and Applications 1 Journal of Dynamical and Control Systems 1 Communications on Pure and Applied Analysis 1 Discrete and Continuous Dynamical Systems. Series S 1 Differential Equations and Applications 1 International Journal of Differential Equations all top 5 Cited in 8 Fields 77 Ordinary differential equations (34-XX) 13 Operator theory (47-XX) 5 Dynamical systems and ergodic theory (37-XX) 2 Integral equations (45-XX) 2 Calculus of variations and optimal control; optimization (49-XX) 2 Biology and other natural sciences (92-XX) 1 Numerical analysis (65-XX) 1 Relativity and gravitational theory (83-XX) Citations by Year