Edit Profile (opens in new tab) Pyatkov, Sergeĭ Grigor’evich Co-Author Distance Author ID: pyatkov.sergei-g Published as: Pyatkov, S. G.; Pyatkov, Sergeĭ Grigor’evich; Pyatkov, Sergey; Pyatkov, Sergey G.; Pyatkov, Sergey Grigir’evich; Pyatkov, Sergey Grigorievich; Pyatkov, Sergei G.; Pyatkov, Sergei; Pyatkuv, S. G.; Pyatkov, S. more...less Homepage: http://www.math.nsc.ru/LBRT/d5/english/pyatkov.htm External Links: ORCID · Math-Net.Ru Documents Indexed: 128 Publications since 1979, including 2 Books and 3 Additional arXiv Preprints Reviewing Activity: 103 Reviews Biographic References: 2 Publications Co-Authors: 39 Co-Authors with 73 Joint Publications 262 Co-Co-Authors all top 5 Co-Authors 55 single-authored 6 Safonov, Egor Ivanovich 6 Shergin, Sergeĭ Nikolaevich 5 Uvarova, Matrena Vladimirovna 4 Baranchuk, Vladislav Aleksandrovich 4 Belonogov, Vladimir Andreevich 4 Neustroeva, Lyubov’ Vladimirovna 3 Abasheeva, N. L. 3 Borichevskaya, A. G. 3 Dzhamalov, Sirojiddin Zuxriddinovich 3 Fayazov, Kudratillo Sadridinovich 3 Korotkova, E. M. 3 Rotko, Valerĭ Vital’evich 3 Tsybikov, B. N. 2 Chugunova, Marina A. 2 Evseev, F. A. 2 Kvich, E. S. 2 Popov, Sergey V. 2 Pron’kina, Tat’yana Vasil’evna 2 Samkov, M. L. 2 Soldatov, O. A. 2 Verzhbitskiĭ, M. A. 1 Anikonov, Yuriĭ Evgenievich 1 Antipin, Vasilii 1 Egorov, Ivan Egorovich 1 Evseev, Fedor 1 Goncharenko, Oleg Valerievich 1 Kametaka, Yoshinori 1 Karabash, Illya M. 1 Khudayberganov, Yashin K. 1 Kozhanov, Aleksandr Ivanovich 1 Kurbanov, Odilzhan Tukhtamuradovich 1 Nagai, Atsushi 1 Orlova, Dar’ya Sergeevna 1 Podgaev, Aleksandr Grigor’evich 1 Potapkov, Alekseĭ Aleksandrovich 1 Potapkov, Alexey 1 Sokolkov, Oleg Igorevich 1 Soldatov, Oleg 1 Watanabe, Kohtaro all top 5 Serials 14 Matematicheskie Zametki SVFU 11 Siberian Mathematical Journal 11 Vestnik Yuzhno-Ural’skogo Gosudarstvennogo Universiteta. Seriya Matematicheskoe Modelirovanie i Programmirovanie 7 Journal of Mathematical Sciences (New York) 7 Matematicheskie Trudy 5 Siberian Advances in Mathematics 5 Matematicheskie Zametki YAGU 3 Journal of Inverse and Ill-Posed Problems 3 Lobachevskii Journal of Mathematics 3 Vestnik Yuzhno-Ural’skogo Gosudarstvennogo Universiteta. Seriya Matematika. Mekhanika. Fizika 2 Mathematical Notes 2 Integral Equations and Operator Theory 2 Sibirskiĭ Matematicheskiĭ Zhurnal 2 Sibirskiĭ Zhurnal Industrial’noĭ Matematiki 2 Differential Equations 2 Journal of Evolution Equations 2 Sibirskie Èlektronnye Matematicheskie Izvestiya 2 Chelyabinskiĭ Fiziko-Matematicheskiĭ Zhurnal 1 Journal of Mathematical Analysis and Applications 1 Matematicheskie Zametki 1 Nonlinearity 1 Differentsial’nye Uravneniya 1 Differential Equations 1 Soviet Mathematics. Doklady 1 Russian Mathematics 1 Russian Academy of Sciences. Sbornik. Mathematics 1 Sbornik: Mathematics 1 Doklady Mathematics 1 Scientiae Mathematicae Japonicae 1 Vestnik Novosibirskogo Gosudarstvennogo Universiteta. Seriya: Matematika, Mekhanika, Informatika 1 Complex Variables and Elliptic Equations 1 Operators and Matrices 1 Azerbaijan Journal of Mathematics 1 Inverse and Ill-Posed Problems Series 1 Journal of Computational and Engineering Mathematics 1 Sibirskiĭ Zhurnal Chistoĭ i Prikladnoĭ Matematiki 1 Journal of Siberian Federal University. Mathematics & Physics 1 Advances in Operator Theory all top 5 Fields 113 Partial differential equations (35-XX) 17 Operator theory (47-XX) 14 Functional analysis (46-XX) 13 Ordinary differential equations (34-XX) 12 Classical thermodynamics, heat transfer (80-XX) 8 Fluid mechanics (76-XX) 7 Numerical analysis (65-XX) 2 Integral equations (45-XX) 1 History and biography (01-XX) 1 Dynamical systems and ergodic theory (37-XX) 1 Calculus of variations and optimal control; optimization (49-XX) 1 Mechanics of deformable solids (74-XX) 1 Optics, electromagnetic theory (78-XX) 1 Statistical mechanics, structure of matter (82-XX) 1 Game theory, economics, finance, and other social and behavioral sciences (91-XX) Publications by Year all cited Publications top 5 cited Publications Citations contained in zbMATH Open 78 Publications have been cited 348 times in 200 Documents Cited by ▼ Year ▼ Nonclassical differential-operator equations. (Неклассические дифференциально-операторные уравнения.) Zbl 1212.35001 Egorov, I. E.; Pyatkov, S. G.; Popov, S. V. 34 2000 Operator theory. Nonclassical problems. Zbl 1031.47001 Pyatkov, S. G. 24 2002 On some classes of coefficient inverse problems for parabolic systems of equations. Zbl 1340.35394 Pyatkov, S. G.; Samkov, M. L. 14 2012 Some properties of eigenfunctions of linear pencils. Zbl 0759.47013 Pyatkov, S. G. 10 1989 On some classes of linear inverse problems for parabolic systems of equations. Zbl 1354.35183 Pyatkov, S. G.; Safonov, E. I. 10 2014 On some classes of inverse problems for parabolic equations. Zbl 1279.35123 Pyatkov, Sergey Grigir’evich 10 2010 Counterexamples in indefinite Sturm–Liouville problems. Zbl 0942.34022 Abasheeva, N. L.; Pyatkov, S. G. 9 1997 Some properties of eigenfunctions and adjoint functions for indefinite Sturm – Liouville problems. Zbl 1103.34014 Pyatkov, S. G. 9 2005 On some inverse problems of determining boundary regimes. Zbl 1399.35368 Verzhbitskiĭ, M. A.; Pyatkov, S. G. 9 2016 On some classes of inverse problems for parabolic and elliptic equations. Zbl 1239.35187 Pyatkov, S. G.; Tsybikov, B. N. 8 2011 On solvability of conjugation problems with non-ideal contact conditions. Zbl 1459.35235 Belonogov, V. A.; Pyatkov, S. G. 7 2020 On some classes of inverse problems with overdetermination data on spatial manifolds. Zbl 1364.35438 Pyatkov, S. G. 7 2016 Determination of the heat transfer coefficient in mathematical models of heat and mass transfer. Zbl 1509.80006 Pyatkov, S. G.; Baranchuk, V. A. 6 2023 Solvability of boundary value problems for operator-differential equations of mixed type: the degenerate case. Zbl 1003.35040 Pyatkov, S. G.; Abasheeva, N. L. 6 2002 On solvability of boundary value problems for kinetic operator-differential equations. Zbl 1318.34080 Pyatkov, Sergey; Popov, Sergey; Antipin, Vasilii 6 2014 Determination of the source function in mathematical models of convection-diffusion. Zbl 1340.80006 Pyatkov, S. G.; Safonov, E. I. 6 2014 Solvability of some inverse problems for the nonstationary heat-and-mass-transfer system. Zbl 1349.35374 Pyatkov, S. G.; Samkov, M. L. 6 2017 On some mathematical models of filtration theory. Zbl 1338.35264 Pyatkuv, S. G.; Shergin, S. N. 6 2015 On the nature of ill-posedness of the forward-backward heat equation. Zbl 1183.35210 Chugunova, Marina; Karabash, Illya M.; Pyatkov, Sergei G. 6 2009 On the solvability of a boundary value problem for a parabolic equation with changing time direction. Zbl 0605.35046 Pyatkov, S. G. 5 1985 Interpolation of some function spaces and indefinite Sturm-Liouville problems. Zbl 0891.34026 Pyatkov, S. G. 5 1998 Solvability of boundary value problems for operator-differential equations of mixed type. Zbl 0964.35171 Pyatkov, S. G.; Abasheeva, N. L. 5 2000 Solvability of some inverse problems for parabolic equations. Zbl 1081.35148 Pyatkov, S. G. 5 2004 On the source function recovering in quasilinear parabolic problems with pointwise overdetermination conditions. Zbl 1398.35238 Pyatkov, Sergeĭ Grigor’evich; Rotko, Valerĭ Vital’evich 5 2017 On some classes of inverse problems of recovering the heat transfer coefficient in stratified media. Zbl 1487.80017 Belonogov, V. A.; Pyatkov, S. G. 5 2022 On some inverse parabolic problems with pointwise overdetermination. Zbl 1535.35216 Pyatkov, Sergey G.; Baranchuk, Vladislav A. 4 2021 Solvability of boundary value problems for a second order equation of mixed type. Zbl 0825.35083 Pyatkov, S. G. 4 1988 Boundary value and inverse problems for some classes of nonclassical operator-differential equations. Zbl 1465.35317 Pyatkov, S. G. 4 2021 Boundary value problems for some classes of singular parabolic equations. Zbl 1077.35052 Pyatkov, S. G. 4 2004 Some classes of inverse problems for mixed type equations of second order. Zbl 1438.35459 Dzhamalov, S. Z.; Pyatkov, S. G. 4 2018 Elliptic eigenvalue problems with an indefinite weight function. Zbl 0851.35100 Pyatkov, S. G. 3 1994 Inverse problems of recovering the heat transfer coefficient with integral data. Zbl 1532.35536 Pyatkov, Sergey; Soldatov, Oleg; Fayazov, Kudratillo 3 2023 On some asymptotic representations of solutions to elliptic equations and their applications. Zbl 1467.35114 Pyatkov, S. G.; Neustroeva, L. V. 3 2021 The best constant of Sobolev inequality in an \(n\) dimensional Euclidean space. Zbl 1079.46023 Kametaka, Yoshinori; Watanabe, Kohtaro; Nagai, Atsushi; Pyatkov, Sergei 3 2005 Identification of thermophysical parameters in mathematical models of heat and mass transfer. Zbl 1513.35547 Pyatkov, Sergey G. 3 2022 Some classes of inverse problems of determining the source function in convection-diffusion systems. Zbl 1401.35348 Pyatkov, S. G. 3 2017 On some inverse problems for first order operator-differential equations. Zbl 1419.35252 Pyatkov, S. G. 3 2019 Some classes of inverse evolution problems for parabolic equations. Zbl 1224.35433 Pyatkov, S. G.; Tsybikov, B. N. 3 2009 A composite equation. Zbl 0444.35061 Pyatkov, S. G. 3 1980 Interpolation of Sobolev spaces and indefinite elliptic spectral problems. Zbl 1198.46020 Pyatkov, S. G. 3 2010 Riesz completeness of the eigenelements and associated elements of linear selfadjoint pencils. Zbl 0834.47007 Pyatkov, S. G. 2 1994 Some boundary value problems for the Sobolev-type operator-differential equations. Zbl 07816094 Uvarova, Matrena Vladimirovna; Pyatkov, Sergeĭ Grigor’evich 2 2019 On some inverse problems of recovering sources in stationary convection-diffusion models. Zbl 1518.35663 Baranchuk, V. A.; Pyatkov, S. G. 2 2023 Inverse problems with pointwise overdetermination for some quasilinear parabolic systems. Zbl 1492.35431 Pyatkov, Sergeĭ Grigor’evich; Rotko, Valeriĭ Vital’evich 2 2019 Indefinite elliptic spectral problems. Zbl 0943.34067 Pyatkov, S. G. 2 1998 Boundary value problems for some equations and systems arising in the theory of electric networks. Zbl 0917.35136 Pyatkov, S. G. 2 1995 Interpolation of weighted Sobolev spaces. Zbl 1066.46017 Pyatkov, S. G. 2 2001 Some inverse problems for convection-diffusion equations. Zbl 1333.35342 Pyatkov, S. G.; Safonov, E. I. 2 2014 On some inverse problems for elliptic equations and systems. Zbl 1240.35578 Pyatkov, S. G. 2 2010 Inverse problems for some Sobolev-type mathematical models. Zbl 1349.35219 Pyatkov, S. G.; Shergin, S. N. 2 2016 On the regular solvability of some classes of transmission problems in a cylindrical space domain. Zbl 1461.35121 Belonogov, Vladimir Andreevich; Pyatkov, Sergey Grigorievich 2 2021 On some boundary value problems for multidimensional higher order equations of mixed type. Zbl 1450.35183 Dzhamalov, S. Z.; Pyatkov, S. G. 2 2020 Some properties of solutions of the Cauchy problem for evolution equations. Zbl 1252.35173 Pyatkov, S. G.; Uvarova, M. V. 2 2012 On the existence of maximal semidefinite invariant subspaces for \(J\)-dissipative operators. Zbl 1246.47009 Pyatkov, S. G. 2 2012 On an equation of composite type. (Über eine Gleichung zusammengesetzten Typs.) Zbl 0426.35072 Pyatkov, S. G. 2 1980 On evolutionary inverse problems for parabolic equations. Zbl 1173.35121 Pyatkov, S. G.; Tsybikov, B. N. 2 2008 On determining the source function in heat and mass transfer problems under integral overdetermination conditions. Zbl 1374.35444 Pyatkov, S. G.; Uvarova, M. V. 2 2016 Solvability of a boundary-value problem for a nonlinear parabolic equation with changing direction of time. Zbl 0646.35047 Pyatkov, S. G.; Podgaev, A. G. 1 1987 Inverse problems for a quasilinear parabolic system with integral overdetermination conditions. Zbl 07820954 Pyatkov, Sergeĭ Grigor’evich; Uvarova, Matrena Vladimirovna; Pron’kina, Tat’yana Vasil’evna 1 2020 On some problems of eigenfunctions of linear pencils. Zbl 0756.47015 Pyatkov, S. G. 1 1992 On some classes of coefficient inverse problems of recovering thermophysical parameters in stratified media. Zbl 1536.35382 Pyatkov, Sergeĭ Grigor’evich; Sokolkov, Oleg Igorevich 1 2023 Recovering of lower order coefficients in forward-backward parabolic equations. Zbl 1459.35401 Pyatkov, S. G.; Kvich, E. S. 1 2018 Elliptic eigenvalue problems with an indefinite weight function. Zbl 0991.35055 Pyatkov, S. G. 1 2000 Solvability of a mixed problem for a model nonlinear parabolic equation. Zbl 0986.35054 Pyatkov, S. G. 1 1993 Compactly supported solutions for a rimming flow model. Zbl 1292.35145 Chugunova, Marina; Pyatkov, Sergey 1 2014 On some classes of inverse problems for pseudoparabolic equations. Zbl 1340.35396 Shergin, S. N.; Pyatkov, S. G. 1 2014 Some inverse problems for mathematical models of heat and mass transfer. Zbl 1298.35253 Pyatkov, S. G.; Borichevskaya, A. G. 1 2013 Interpolation of weighted Sobolev spaces. Zbl 0976.46008 Pyatkov, S. G. 1 2000 Boundary value problems for some classes of singular parabolic equations. Zbl 1049.35089 Pyatkov, S. G. 1 2003 Solvability of boundary value problems for an ultraparabolic equation. Zbl 0798.35088 Pyatkov, S. G. 1 1990 On some classes of nonlocal boundary-value problems for singular parabolic equations. Zbl 1429.35188 Pyatkov, S. G. 1 2019 Parameter identification and control in heat transfer processes. Zbl 1386.35246 Pyatkov, Sergeĭ Grigor’evich; Goncharenko, Oleg Valerievich 1 2017 Certain inverse problems for parabolic equations. Zbl 1151.35430 Pyatkov, S. G. 1 2008 On properties of eigenfunctions of a certain spectral problem and their applications. Zbl 0594.35075 Pyatkov, S. G. 1 1984 Maximal semidefinite invariant subspaces for \(J\)-dissipative operators. Zbl 1277.47052 Pyatkov, S. G. 1 2012 On an inverse problem for a parabolic equation with the Cauchy data on a part of the lateral boundary of a cylinder. Zbl 1307.35320 Pyatkov, S. G.; Borichevskaya, A. G. 1 2013 Inverse problems for the Black-Scholes equation and related problems. Zbl 1135.35099 Pyatkov, S. G. 1 2007 Inverse problems of recovering the boundary data with integral overdetermination conditions. Zbl 1410.35289 Pyatkov, S. G.; Verzhbitskiĭ, M. A. 1 2018 Determination of the heat transfer coefficient in mathematical models of heat and mass transfer. Zbl 1509.80006 Pyatkov, S. G.; Baranchuk, V. A. 6 2023 Inverse problems of recovering the heat transfer coefficient with integral data. Zbl 1532.35536 Pyatkov, Sergey; Soldatov, Oleg; Fayazov, Kudratillo 3 2023 On some inverse problems of recovering sources in stationary convection-diffusion models. Zbl 1518.35663 Baranchuk, V. A.; Pyatkov, S. G. 2 2023 On some classes of coefficient inverse problems of recovering thermophysical parameters in stratified media. Zbl 1536.35382 Pyatkov, Sergeĭ Grigor’evich; Sokolkov, Oleg Igorevich 1 2023 On some classes of inverse problems of recovering the heat transfer coefficient in stratified media. Zbl 1487.80017 Belonogov, V. A.; Pyatkov, S. G. 5 2022 Identification of thermophysical parameters in mathematical models of heat and mass transfer. Zbl 1513.35547 Pyatkov, Sergey G. 3 2022 On some inverse parabolic problems with pointwise overdetermination. Zbl 1535.35216 Pyatkov, Sergey G.; Baranchuk, Vladislav A. 4 2021 Boundary value and inverse problems for some classes of nonclassical operator-differential equations. Zbl 1465.35317 Pyatkov, S. G. 4 2021 On some asymptotic representations of solutions to elliptic equations and their applications. Zbl 1467.35114 Pyatkov, S. G.; Neustroeva, L. V. 3 2021 On the regular solvability of some classes of transmission problems in a cylindrical space domain. Zbl 1461.35121 Belonogov, Vladimir Andreevich; Pyatkov, Sergey Grigorievich 2 2021 On solvability of conjugation problems with non-ideal contact conditions. Zbl 1459.35235 Belonogov, V. A.; Pyatkov, S. G. 7 2020 On some boundary value problems for multidimensional higher order equations of mixed type. Zbl 1450.35183 Dzhamalov, S. Z.; Pyatkov, S. G. 2 2020 Inverse problems for a quasilinear parabolic system with integral overdetermination conditions. Zbl 07820954 Pyatkov, Sergeĭ Grigor’evich; Uvarova, Matrena Vladimirovna; Pron’kina, Tat’yana Vasil’evna 1 2020 On some inverse problems for first order operator-differential equations. Zbl 1419.35252 Pyatkov, S. G. 3 2019 Some boundary value problems for the Sobolev-type operator-differential equations. Zbl 07816094 Uvarova, Matrena Vladimirovna; Pyatkov, Sergeĭ Grigor’evich 2 2019 Inverse problems with pointwise overdetermination for some quasilinear parabolic systems. Zbl 1492.35431 Pyatkov, Sergeĭ Grigor’evich; Rotko, Valeriĭ Vital’evich 2 2019 On some classes of nonlocal boundary-value problems for singular parabolic equations. Zbl 1429.35188 Pyatkov, S. G. 1 2019 Some classes of inverse problems for mixed type equations of second order. Zbl 1438.35459 Dzhamalov, S. Z.; Pyatkov, S. G. 4 2018 Recovering of lower order coefficients in forward-backward parabolic equations. Zbl 1459.35401 Pyatkov, S. G.; Kvich, E. S. 1 2018 Inverse problems of recovering the boundary data with integral overdetermination conditions. Zbl 1410.35289 Pyatkov, S. G.; Verzhbitskiĭ, M. A. 1 2018 Solvability of some inverse problems for the nonstationary heat-and-mass-transfer system. Zbl 1349.35374 Pyatkov, S. G.; Samkov, M. L. 6 2017 On the source function recovering in quasilinear parabolic problems with pointwise overdetermination conditions. Zbl 1398.35238 Pyatkov, Sergeĭ Grigor’evich; Rotko, Valerĭ Vital’evich 5 2017 Some classes of inverse problems of determining the source function in convection-diffusion systems. Zbl 1401.35348 Pyatkov, S. G. 3 2017 Parameter identification and control in heat transfer processes. Zbl 1386.35246 Pyatkov, Sergeĭ Grigor’evich; Goncharenko, Oleg Valerievich 1 2017 On some inverse problems of determining boundary regimes. Zbl 1399.35368 Verzhbitskiĭ, M. A.; Pyatkov, S. G. 9 2016 On some classes of inverse problems with overdetermination data on spatial manifolds. Zbl 1364.35438 Pyatkov, S. G. 7 2016 Inverse problems for some Sobolev-type mathematical models. Zbl 1349.35219 Pyatkov, S. G.; Shergin, S. N. 2 2016 On determining the source function in heat and mass transfer problems under integral overdetermination conditions. Zbl 1374.35444 Pyatkov, S. G.; Uvarova, M. V. 2 2016 On some mathematical models of filtration theory. Zbl 1338.35264 Pyatkuv, S. G.; Shergin, S. N. 6 2015 On some classes of linear inverse problems for parabolic systems of equations. Zbl 1354.35183 Pyatkov, S. G.; Safonov, E. I. 10 2014 On solvability of boundary value problems for kinetic operator-differential equations. Zbl 1318.34080 Pyatkov, Sergey; Popov, Sergey; Antipin, Vasilii 6 2014 Determination of the source function in mathematical models of convection-diffusion. Zbl 1340.80006 Pyatkov, S. G.; Safonov, E. I. 6 2014 Some inverse problems for convection-diffusion equations. Zbl 1333.35342 Pyatkov, S. G.; Safonov, E. I. 2 2014 Compactly supported solutions for a rimming flow model. Zbl 1292.35145 Chugunova, Marina; Pyatkov, Sergey 1 2014 On some classes of inverse problems for pseudoparabolic equations. Zbl 1340.35396 Shergin, S. N.; Pyatkov, S. G. 1 2014 Some inverse problems for mathematical models of heat and mass transfer. Zbl 1298.35253 Pyatkov, S. G.; Borichevskaya, A. G. 1 2013 On an inverse problem for a parabolic equation with the Cauchy data on a part of the lateral boundary of a cylinder. Zbl 1307.35320 Pyatkov, S. G.; Borichevskaya, A. G. 1 2013 On some classes of coefficient inverse problems for parabolic systems of equations. Zbl 1340.35394 Pyatkov, S. G.; Samkov, M. L. 14 2012 Some properties of solutions of the Cauchy problem for evolution equations. Zbl 1252.35173 Pyatkov, S. G.; Uvarova, M. V. 2 2012 On the existence of maximal semidefinite invariant subspaces for \(J\)-dissipative operators. Zbl 1246.47009 Pyatkov, S. G. 2 2012 Maximal semidefinite invariant subspaces for \(J\)-dissipative operators. Zbl 1277.47052 Pyatkov, S. G. 1 2012 On some classes of inverse problems for parabolic and elliptic equations. Zbl 1239.35187 Pyatkov, S. G.; Tsybikov, B. N. 8 2011 On some classes of inverse problems for parabolic equations. Zbl 1279.35123 Pyatkov, Sergey Grigir’evich 10 2010 Interpolation of Sobolev spaces and indefinite elliptic spectral problems. Zbl 1198.46020 Pyatkov, S. G. 3 2010 On some inverse problems for elliptic equations and systems. Zbl 1240.35578 Pyatkov, S. G. 2 2010 On the nature of ill-posedness of the forward-backward heat equation. Zbl 1183.35210 Chugunova, Marina; Karabash, Illya M.; Pyatkov, Sergei G. 6 2009 Some classes of inverse evolution problems for parabolic equations. Zbl 1224.35433 Pyatkov, S. G.; Tsybikov, B. N. 3 2009 On evolutionary inverse problems for parabolic equations. Zbl 1173.35121 Pyatkov, S. G.; Tsybikov, B. N. 2 2008 Certain inverse problems for parabolic equations. Zbl 1151.35430 Pyatkov, S. G. 1 2008 Inverse problems for the Black-Scholes equation and related problems. Zbl 1135.35099 Pyatkov, S. G. 1 2007 Some properties of eigenfunctions and adjoint functions for indefinite Sturm – Liouville problems. Zbl 1103.34014 Pyatkov, S. G. 9 2005 The best constant of Sobolev inequality in an \(n\) dimensional Euclidean space. Zbl 1079.46023 Kametaka, Yoshinori; Watanabe, Kohtaro; Nagai, Atsushi; Pyatkov, Sergei 3 2005 Solvability of some inverse problems for parabolic equations. Zbl 1081.35148 Pyatkov, S. G. 5 2004 Boundary value problems for some classes of singular parabolic equations. Zbl 1077.35052 Pyatkov, S. G. 4 2004 Boundary value problems for some classes of singular parabolic equations. Zbl 1049.35089 Pyatkov, S. G. 1 2003 Operator theory. Nonclassical problems. Zbl 1031.47001 Pyatkov, S. G. 24 2002 Solvability of boundary value problems for operator-differential equations of mixed type: the degenerate case. Zbl 1003.35040 Pyatkov, S. G.; Abasheeva, N. L. 6 2002 Interpolation of weighted Sobolev spaces. Zbl 1066.46017 Pyatkov, S. G. 2 2001 Nonclassical differential-operator equations. (Неклассические дифференциально-операторные уравнения.) Zbl 1212.35001 Egorov, I. E.; Pyatkov, S. G.; Popov, S. V. 34 2000 Solvability of boundary value problems for operator-differential equations of mixed type. Zbl 0964.35171 Pyatkov, S. G.; Abasheeva, N. L. 5 2000 Elliptic eigenvalue problems with an indefinite weight function. Zbl 0991.35055 Pyatkov, S. G. 1 2000 Interpolation of weighted Sobolev spaces. Zbl 0976.46008 Pyatkov, S. G. 1 2000 Interpolation of some function spaces and indefinite Sturm-Liouville problems. Zbl 0891.34026 Pyatkov, S. G. 5 1998 Indefinite elliptic spectral problems. Zbl 0943.34067 Pyatkov, S. G. 2 1998 Counterexamples in indefinite Sturm–Liouville problems. Zbl 0942.34022 Abasheeva, N. L.; Pyatkov, S. G. 9 1997 Boundary value problems for some equations and systems arising in the theory of electric networks. Zbl 0917.35136 Pyatkov, S. G. 2 1995 Elliptic eigenvalue problems with an indefinite weight function. Zbl 0851.35100 Pyatkov, S. G. 3 1994 Riesz completeness of the eigenelements and associated elements of linear selfadjoint pencils. Zbl 0834.47007 Pyatkov, S. G. 2 1994 Solvability of a mixed problem for a model nonlinear parabolic equation. Zbl 0986.35054 Pyatkov, S. G. 1 1993 On some problems of eigenfunctions of linear pencils. Zbl 0756.47015 Pyatkov, S. G. 1 1992 Solvability of boundary value problems for an ultraparabolic equation. Zbl 0798.35088 Pyatkov, S. G. 1 1990 Some properties of eigenfunctions of linear pencils. Zbl 0759.47013 Pyatkov, S. G. 10 1989 Solvability of boundary value problems for a second order equation of mixed type. Zbl 0825.35083 Pyatkov, S. G. 4 1988 Solvability of a boundary-value problem for a nonlinear parabolic equation with changing direction of time. Zbl 0646.35047 Pyatkov, S. G.; Podgaev, A. G. 1 1987 On the solvability of a boundary value problem for a parabolic equation with changing time direction. Zbl 0605.35046 Pyatkov, S. G. 5 1985 On properties of eigenfunctions of a certain spectral problem and their applications. Zbl 0594.35075 Pyatkov, S. G. 1 1984 A composite equation. Zbl 0444.35061 Pyatkov, S. G. 3 1980 On an equation of composite type. (Über eine Gleichung zusammengesetzten Typs.) Zbl 0426.35072 Pyatkov, S. G. 2 1980 all cited Publications top 5 cited Publications all top 5 Cited by 189 Authors 43 Pyatkov, Sergeĭ Grigor’evich 16 Kozhanov, Aleksandr Ivanovich 11 Fëdorov, Vladimir Evgen’evich 10 Fayazov, Kudratillo Sadridinovich 7 Sviridyuk, Georgiĭ Anatol’evich 6 Fleige, Andreas 5 Belonogov, Vladimir Andreevich 5 Kostenko, Aleksey S. 5 Nagumanova, Anna Viktorovna 4 Andreev, Viktor Konstantinovich 4 Azizbayov, Elvin Ibrahim 4 Baranchuk, Vladislav Aleksandrovich 4 Dzhamalov, Sirojiddin Zuxriddinovich 4 Shipina, Tat’yana N. 3 Artyushin, Aleksandr Nikolaevich 3 Ashurov, Ravshan Rajabovich 3 Ashyralyyev, Charyyar 3 Chebotarev, Alexander Yurievich 3 Khajiev, Ikrombek O. 3 Khudayberganov, Yashin K. 3 Lar’kin, Nikolaj Andreevich 3 Marletta, Marco 3 Potapova, S. V. 3 Safonov, Egor Ivanovich 3 Uvarova, Matrena Vladimirovna 3 Watanabe, Kohtaro 3 Zamyshlyaeva, Alena Aleksandrovna 2 Boulton, Lyonell 2 Bychkov, Evgeniĭ Viktorovich 2 Chugunova, Marina A. 2 Ćurgus, Branko 2 Doronin, Gleb Germanovitch 2 Gavrilova, Ol’ga Vital’evna 2 Gimaltdinova, Alfira Avkalevna 2 Ismailov, Mansur I. 2 Kaikina, Elena Igorevna 2 Kametaka, Yoshinori 2 Karabash, Illya M. 2 Karimov, Shakhobiddin T. 2 Korpusov, Maksim Olegovich 2 Kostić, Marko 2 Kvich, E. S. 2 Lesnic, Daniel 2 Lyubanova, Anna Sh. 2 Manakova, Natal’ya Aleksandrovna 2 Mehraliyev, Yashar T. 2 Nagai, Atsushi 2 Neustroeva, Lyubov’ Vladimirovna 2 Podgaev, Aleksandr Grigor’evich 2 Pron’kina, Tat’yana Vasil’evna 2 Sagadeeva, Minzilya Almasovna 2 Sayidova, N. S. 2 Sveshnikov, Alekseĭ Georgievich 2 Trunk, Carsten 2 Volkmer, Hans W. 2 Zagrebina, Sof’ya Aleksandrovna 1 Abasheeva, N. L. 1 Abdullayeva, Zamira Shamshaddinovna 1 Abulov, Mumin Orzikulovich 1 Aceto, Lidia 1 Acosta, Gabriel 1 Aĭtzhanov, Serik Ersultanovich 1 Akkan, Pinar 1 Alazman, Ibtehal 1 Aldawish, Ibtisam 1 Aliev, Ramiz Atash 1 Amirov, Sherif 1 Antipin, V. I. 1 Antipin, Vasilii 1 Antontsev, Stanislav Nikolaevich 1 Ashurova, Guzel Rashitkhuzhakyzy 1 Avilovich, Anna Sergeevna 1 Azizov, Muzaffar Sulaĭmonovich 1 Azizov, Tomas Ya. 1 Baskakov, Anatoliĭ Grigor’evich 1 Bedin, Luciano 1 Behrndt, Jussi 1 Bekiev, Ashirmet Bekievich 1 Berdyshev, Abdumauvlen Suleymanovich 1 Bogomolov, Alexey 1 Bokalo, Mykola M. 1 Borichevskaya, A. G. 1 Brizitskiĭ, Roman Viktorovich 1 Burchard, Almut 1 Cheb, E. S. 1 Chistyakov, Viktor Filimonovich 1 Chistyakova, Elena Viktorovna 1 Chiyaneh, Akbar Barati 1 Cwikel, Michael 1 Denk, Robert 1 Derkach, Volodymyr Oleksandrovych 1 Dijksma, Aad 1 Domanska, Halyna 1 Dong, Yingdu 1 Drelichman, Irene 1 Durán, Ricardo G. 1 Duru, Hakki 1 Dzhamalov, Sirozhiddin Zukhriddinovich 1 Einav, Amit 1 Erkovan, Sait ...and 89 more Authors all top 5 Cited in 73 Serials 16 Siberian Mathematical Journal 15 Journal of Mathematical Sciences (New York) 12 Lobachevskii Journal of Mathematics 11 Matematicheskie Zametki SVFU 8 Integral Equations and Operator Theory 8 Vestnik Yuzhno-Ural’skogo Gosudarstvennogo Universiteta. Seriya Matematicheskoe Modelirovanie i Programmirovanie 7 Mathematical Notes 7 Journal of Siberian Federal University. Mathematics & Physics 6 Journal of Inverse and Ill-Posed Problems 6 Chelyabinskiĭ Fiziko-Matematicheskiĭ Zhurnal 5 Journal of Mathematical Analysis and Applications 5 Computational Mathematics and Mathematical Physics 4 Differential Equations 4 Sibirskie Èlektronnye Matematicheskie Izvestiya 4 Izvestiya Irkutskogo Gosudarstvennogo Universiteta. Seriya Matematika 4 Vestnik Yuzhno-Ural’skogo Gosudarstvennogo Universiteta. Seriya Matematika. Mekhanika. Fizika 3 Matematicheskie Trudy 3 Boundary Value Problems 2 Functional Analysis and its Applications 2 Journal of Differential Equations 2 Mathematische Nachrichten 2 Nonlinear Analysis. Theory, Methods & Applications. Series A: Theory and Methods 2 Numerical Algorithms 2 Russian Mathematics 2 Doklady Mathematics 2 Matematychni Studiï 2 Sibirskiĭ Zhurnal Industrial’noĭ Matematiki 2 Journal of Evolution Equations 2 Complex Variables and Elliptic Equations 2 Advances in Differential Equations and Control Processes 1 Applicable Analysis 1 Mathematical Methods in the Applied Sciences 1 Nonlinearity 1 Reports on Mathematical Physics 1 Advances in Mathematics 1 Applied Mathematics and Computation 1 Journal of Functional Analysis 1 Mathematische Annalen 1 Mathematika 1 Numerical Functional Analysis and Optimization 1 Proceedings of the Japan Academy. Series A 1 Studies in Applied Mathematics 1 Tokyo Journal of Mathematics 1 Applied Numerical Mathematics 1 Numerical Methods for Partial Differential Equations 1 Applied Mathematics Letters 1 Communications in Partial Differential Equations 1 Proceedings of the Royal Society of Edinburgh. Section A. Mathematics 1 Electronic Journal of Differential Equations (EJDE) 1 Filomat 1 Advances in Computational Mathematics 1 Boletín de la Sociedad Matemática Mexicana. Third Series 1 Journal of Inequalities and Applications 1 Fractional Calculus & Applied Analysis 1 Differentsial’nye Uravneniya i Protsessy Upravleniya 1 Proceedings of Institute of Mathematics and Mechanics. National Academy of Sciences of Azerbaijan 1 Missouri Journal of Mathematical Sciences 1 Vladikavkazskiĭ Matematicheskiĭ Zhurnal 1 Boletim da Sociedade Paranaense de Matemática. Terceira Série 1 Mediterranean Journal of Mathematics 1 Inverse Problems in Science and Engineering 1 Discrete and Continuous Dynamical Systems. Series S 1 Vestnik Samarskogo Gosudarstvennogo Tekhnicheskogo Universiteta. Seriya Fiziko-Matematicheskie Nauki 1 Dal’nevostochnyĭ Matematicheskiĭ Zhurnal 1 Journal of Spectral Theory 1 Vestnik Udmurtskogo Universiteta. Matematika. Mekhanika. Komp’yuternye Nauki 1 Evolution Equations and Control Theory 1 Journal of Linear and Topological Algebra 1 Journal of Computational and Engineering Mathematics 1 Journal of Elliptic and Parabolic Equations 1 Sibirskiĭ Zhurnal Chistoĭ i Prikladnoĭ Matematiki 1 Advances in Operator Theory 1 Vestnik KRAUNTS. Fiziko-Matematicheskie Nauki all top 5 Cited in 18 Fields 154 Partial differential equations (35-XX) 44 Ordinary differential equations (34-XX) 33 Operator theory (47-XX) 20 Numerical analysis (65-XX) 12 Functional analysis (46-XX) 11 Real functions (26-XX) 11 Fluid mechanics (76-XX) 8 Classical thermodynamics, heat transfer (80-XX) 4 Integral equations (45-XX) 3 Calculus of variations and optimal control; optimization (49-XX) 3 Probability theory and stochastic processes (60-XX) 2 Potential theory (31-XX) 2 Statistical mechanics, structure of matter (82-XX) 1 Dynamical systems and ergodic theory (37-XX) 1 Global analysis, analysis on manifolds (58-XX) 1 Mechanics of deformable solids (74-XX) 1 Operations research, mathematical programming (90-XX) 1 Systems theory; control (93-XX) Citations by Year