Edit Profile (opens in new tab) Bakhtin, Oleksandr Konstyantynovych (b. 1948 d. 2021) Co-Author Distance Author ID: bakhtin.oleksandr-kostyantynovych Published as: Bakhtin, A. K.; Bahtin, A. K.; Bakhtin, O. K.; Bakhtin, Aleksandr K.; Bakhtin, Aleksandr; Bakhtin, Aleksandr Konstantinovich; Bakhtin, Alexandr K.; Bakhtin, Alexander; Bakhtin, Alexandr; Bakhtyn, O. K. more...less Further Spellings: Бахтин Александр Константинович; Бахтін Олександр Костянтинович External Links: MGP · Wikidata · Math-Net.Ru Documents Indexed: 105 Publications since 1974, including 1 Book and 5 Additional arXiv Preprints Biographic References: 2 Publications Co-Authors: 23 Co-Authors with 64 Joint Publications 185 Co-Co-Authors all top 5 Co-Authors 40 single-authored 25 Denega, Iryna Viktorovna 17 Bakhtina, G. P. 8 Targonskij, Andriy L. 6 Zabolotnyĭ, Ya. V. 5 Dvorak, Inna Yaroslavovna 5 Vyhivska, Liudmyla Vyacheslavivna 5 V’yun, V. E. 3 Zelins’kyĭ, Yuriĭ Borysovych 2 Plaksa, Sergiy Anatoliyovych 2 Podvysotskii, R. V. 2 Trokhymchuk, Yuriĭ Yuriĭovych 2 Vygivska, Liudmyla V. 1 Gerasimenko, Viktor Ivanovich 1 Gryshchuk, Serhii V. 1 Klishchuk, Bogdan Anatol’evich 1 Ławrynowicz, Julian 1 Osipchuk, Tat’yana Mikhailovna 1 Targonski, György I. 1 Tkachuk, Maksim Vladimirovich 1 Vjun, V. E. 1 Vygivska, Lyudmila 1 Vygovskaya, L. V. 1 Zabolotnyi, Yaroslav Vladimirovich all top 5 Serials 19 Dopovidi Natsional’noï Akademiï Nauk Ukraïny. Matematyka, Pryrodoznavstvo, Tekhnichni Nauky 18 Zbirnyk Prats’ Instytutu Matematyky NAN Ukraïny 13 Ukrainian Mathematical Journal 10 Journal of Mathematical Sciences (New York) 9 Ukraïns’kyĭ Matematychnyĭ Zhurnal 8 National Academy of Sciences of Ukraine. Institute of Mathematics. Preprint 5 Bulletin de la Société des Sciences et des Lettres de Łódź. Série: Recherches sur les Déformations 2 Neliniĭni Kolyvannya 2 Nonlinear Oscillations 1 Soviet Mathematics. Doklady 1 Doklady Mathematics 1 Matematychni Studiï 1 Lobachevskii Journal of Mathematics 1 Proceedings of the Steklov Institute of Mathematics 1 Problemy Analiza. Issues of Analysis Fields 97 Functions of a complex variable (30-XX) 3 History and biography (01-XX) 2 Potential theory (31-XX) 2 Differential geometry (53-XX) 1 Several complex variables and analytic spaces (32-XX) Publications by Year all cited Publications top 5 cited Publications Citations contained in zbMATH Open 57 Publications have been cited 313 times in 80 Documents Cited by ▼ Year ▼ Topological-algebraic structures and geometric methods in complex analysis. (Тополого-алгебраические структуры и геометрические методы в комплексном анализе.) Zbl 1199.30001 Bakhtin, A. K.; Bakhtina, G. P.; Zelinskiĭ, Yu. B. 65 2008 Generalized \((n, d)\)-ray systems of points and inequalities for nonoverlapping domains and open sets. Zbl 1231.30012 Bakhtin, A. K.; Targonskii, A. L. 13 2011 Extremal problems and quadratic coefficients. Zbl 1107.30019 Bakhtin, A. K.; Targonskiy, A. L. 13 2005 Addendum to a theorem on extremal decomposition of the complex plane. Zbl 1297.30044 Bakhtin, Alexandr; Denega, Iryna 13 2012 Inequalities for the inner radii of nonoverlapping domains and open sets. Zbl 1224.30119 Bakhtin, O. K. 12 2009 Inequalities for the inner radii of nonoverlapping domains. Zbl 1436.30006 Bakhtin, A. K.; Denega, I. V. 12 2019 Extremal decomposition of the complex plane with free poles. Zbl 1451.30022 Bakhtin, Aleksandr K.; Denega, Iryna V. 12 2020 Separating transformation and extremal problems on nonoverlapping simply connected domains. Zbl 1404.30009 Bakhtin, Aleksandr Konstantinovich 11 2018 Some extremal problems in the theory of nonoverlapping domains with free poles on rays. Zbl 1112.30017 Bakhtin, A. K.; Targonskij, A. L. 10 2006 Estimates of internal radii for non-intersecting domains. Zbl 1389.30104 Bakhtin, A. K. 10 2017 Extremal decomposition of the complex plane with restrictions for free poles. Zbl 1395.30029 Bakhtin, Aleksandr Konstantinovich 10 2018 \(N\)-radial systems of points and problems for non-overlapping domains. Zbl 1369.30023 Bakhtin, Alexander; Vygivska, Lyudmila; Denega, I. 8 2017 Extremal decomposition of a complex plane with fixed poles. Zbl 1389.30105 Bakhtin, A. K.; Bakhtina, G. P.; Denega, I. V. 7 2017 Generalization of some results of the theory of schlicht functions to multidimensional complex spaces. Zbl 1240.30036 Bakhtin, A. K. 6 2011 Generalized M. A. Lavrentiev’s inequality. Zbl 1493.30016 Bakhtin, Aleksandr K.; Denega, Iryna V. 6 2022 Estimates of the products on inner radii for multiconnected domains. Zbl 1476.30099 Bakhtin, A. K.; Zabolotnii, Ya. V. 6 2021 Weakened problem on extremal decomposition of the complex plane. Zbl 1425.30027 Bakhtin, A. K.; Denega, I. V. 5 2019 Inequalities for the internal radii of non-overlapping domains. Zbl 1362.30038 Bakhtin, Aleksandr K.; Vygivska, Liudmyla V.; Denega, Iryna V. 5 2017 Piecewise separating transformation and extremal problems with free poles. Zbl 1219.30012 Bakhtin, A. K. 4 2005 Separation transformation and problems on non-overlapping domains. Zbl 1199.30145 Bakhtina, G. P.; Bakhtin, A. K. 4 2006 Estimates for the product of inner radii of five nonoverlapping domains. Zbl 1499.30219 Bakhtin, O. K.; Zabolotnyi, Ya. V.; Dvorak, I. Ya. 4 2017 Separating transformation and extremal decomposition of the complex plane. Zbl 1366.30020 Bakhtin, Aleksandr; Dvorak, Inna; Denega, Iryna 4 2016 Inequalities for the inner radii of nonoverlapping domains and open sets. Zbl 1120.30022 Bakhtin, A. K. 3 2006 On extremal problems for symmetric nonoverlapping domains. Zbl 0936.30019 Bakhtina, G. P.; Bakhtin, A. K. 3 1997 Analytic functions of vector argument and partially conformal mappings in multidimensional complex spaces. Zbl 1249.30131 Bakhtin, A. K. 3 2012 Some properties of functionals for \(N\)-array systems of points. Zbl 1249.30081 Bakhtin, A. K.; Denega, I. V. 3 2011 Inequalities for the inner radii of symmetric disjoint domains. Zbl 1425.30028 Bakhtin, A. K.; Denega, I. V.; Vygovskaya, L. V. 3 2019 Estimates of a product of the inner radii of nonoverlapping domains. Zbl 1390.30021 Bakhtin, Aleksandr Konstantinovich; Zabolotnyi, Yaroslav Vladimirovich 3 2017 A problem of extreme decomposition of the complex plane with free poles. Zbl 1503.30027 Bakhtin, A. K. 3 2020 Sharp estimates of products of inner radii of non-overlapping domains in the complex plane. Zbl 1427.30042 Bakhtin, A. K.; Denega, I. V. 3 2019 Extremal decomposition of the complex plane with free poles. II. Zbl 1450.30019 Bakhtin, Aleksandr K.; Denega, Iryna V. 3 2020 Estimation of the maximum product of inner radii of mutually disjoint domains. Zbl 1451.30021 Bakhtin, A. K.; Denega, I. V. 3 2020 Problem of extreme decomposition for a complex plane with free poles on a circle. Zbl 1469.30055 Bakhtin, A. K.; Vyhivska, L. V.; Denega, I. V. 3 2021 Inequality for the inner radii of symmetric non-overlapping domains. Zbl 1538.30102 Bakhtin, Aleksandr; Vyhivska, Liudmyla; Denega, Iryna 3 2018 On the product of inner radii of symmetric nonoverlapping domains. Zbl 0936.30017 Bakhtin, A. K. 2 1997 Extremal problems on nonoverlapping domains and quadratic differentials. Zbl 1091.30018 Bakhtin, A. K.; Bakhtina, G. P. 2 2005 On a problem of V. N. Dubinin. Zbl 1289.30143 Bakhtin, A. K.; Denega, I. V. 2 2013 Extremal problems of nonoverlapping domains with free poles on a circle. Zbl 1112.30016 Bakhtin, A. K. 2 2006 Estimates of the inner radii of symmetric non-overlapping domains. Zbl 1427.30015 Bakhtin, Aleksandr K.; Vyhivska, Liudmyla V. 2 2019 A separating transformation in problems of extremal decomposition of the complex plane. Zbl 1363.30045 Bakhtin, A. K.; Dvorak, I. Ya.; Denega, I. V. 2 2015 Method of separation transformation in the problem of maximum of product of powers of inner radiuses of non-overlapping domains. Zbl 1289.30146 Bakhtin, A. K.; Denega, I. V. 2 2012 Estimation of the products of some powers of inner radii for multiconnected domains. Zbl 1492.30057 Bakhtin, A. K.; Zabolotnii, Ya. V. 2 2022 Problems of extremal decomposition of a complex plane. Zbl 1488.30017 Bakhtin, O. K.; Denega, I. V.; Vygivs’ka, L. V.; Dvorak, I. Ya. 2 2020 On some extremal problems of the geometric theory of functions of complex variable. Zbl 1120.30023 Bakhtin, A. K. 1 2006 Estimates of the product of the inner radii of three nonoverlapping domains. Zbl 1289.30145 Bakhtin, O. K.; Zabolotnyj, Ya. V. 1 2013 Quadratic differentials in problems of the product of inner radii of nonoverlapping domains. Zbl 1268.30034 Bakhtin, A. K.; V’yun, V. E. 1 2007 Application of a separating transformation to estimates of inner radii of open sets. Zbl 1164.30372 Bakhtin, A. K.; V’yun, V. E. 1 2007 Sharp estimates for inner radii of systems of nonoverlapping domains and open sets. Zbl 1164.30371 Bakhtin, A. K. 1 2007 Inequalities for the inner radii of non-overlapping domains. Zbl 1164.30373 Bakhtin, A. K.; V’yun, V. E.; Trokhimchuk, Yu. Yu. 1 2007 Inequalities for inner radii of nonoverlapping domains. Zbl 1199.30143 Bakhtin, A. K.; Bakhtina, G. P.; Podvysotskij, R. V. 1 2009 Some properties of functions of class S. Zbl 0462.30012 Bakhtin, A. K. 1 1981 Some properties of functions of class S. Zbl 0467.30016 Bakhtin, A. K. 1 1981 Estimates of some functionals for open sets. Zbl 1107.30018 Bakhtin, A. K. 1 2005 A piecewise separating transformation and extremal problems with free poles on rays. Zbl 1066.30024 Bakhtin, A. K. 1 2004 On some inequalities in the theory of non-overlapping domains. Zbl 1313.30095 Bakhtin, O. K.; Bakhtina, G. P.; V’yun, V. E. 1 2014 Problem on extremal decomposition of the complex plane with free poles. Zbl 1450.30020 Bakhtin, Aleksandr K.; Vyhivska, Liudmyla V. 1 2020 Quadratic differentials and extremal problems of nonoverlapping domains. Zbl 1337.30033 Bakhtin, A. K.; Podvysotskii, R. V. 1 2011 Generalized M. A. Lavrentiev’s inequality. Zbl 1493.30016 Bakhtin, Aleksandr K.; Denega, Iryna V. 6 2022 Estimation of the products of some powers of inner radii for multiconnected domains. Zbl 1492.30057 Bakhtin, A. K.; Zabolotnii, Ya. V. 2 2022 Estimates of the products on inner radii for multiconnected domains. Zbl 1476.30099 Bakhtin, A. K.; Zabolotnii, Ya. V. 6 2021 Problem of extreme decomposition for a complex plane with free poles on a circle. Zbl 1469.30055 Bakhtin, A. K.; Vyhivska, L. V.; Denega, I. V. 3 2021 Extremal decomposition of the complex plane with free poles. Zbl 1451.30022 Bakhtin, Aleksandr K.; Denega, Iryna V. 12 2020 A problem of extreme decomposition of the complex plane with free poles. Zbl 1503.30027 Bakhtin, A. K. 3 2020 Extremal decomposition of the complex plane with free poles. II. Zbl 1450.30019 Bakhtin, Aleksandr K.; Denega, Iryna V. 3 2020 Estimation of the maximum product of inner radii of mutually disjoint domains. Zbl 1451.30021 Bakhtin, A. K.; Denega, I. V. 3 2020 Problems of extremal decomposition of a complex plane. Zbl 1488.30017 Bakhtin, O. K.; Denega, I. V.; Vygivs’ka, L. V.; Dvorak, I. Ya. 2 2020 Problem on extremal decomposition of the complex plane with free poles. Zbl 1450.30020 Bakhtin, Aleksandr K.; Vyhivska, Liudmyla V. 1 2020 Inequalities for the inner radii of nonoverlapping domains. Zbl 1436.30006 Bakhtin, A. K.; Denega, I. V. 12 2019 Weakened problem on extremal decomposition of the complex plane. Zbl 1425.30027 Bakhtin, A. K.; Denega, I. V. 5 2019 Inequalities for the inner radii of symmetric disjoint domains. Zbl 1425.30028 Bakhtin, A. K.; Denega, I. V.; Vygovskaya, L. V. 3 2019 Sharp estimates of products of inner radii of non-overlapping domains in the complex plane. Zbl 1427.30042 Bakhtin, A. K.; Denega, I. V. 3 2019 Estimates of the inner radii of symmetric non-overlapping domains. Zbl 1427.30015 Bakhtin, Aleksandr K.; Vyhivska, Liudmyla V. 2 2019 Separating transformation and extremal problems on nonoverlapping simply connected domains. Zbl 1404.30009 Bakhtin, Aleksandr Konstantinovich 11 2018 Extremal decomposition of the complex plane with restrictions for free poles. Zbl 1395.30029 Bakhtin, Aleksandr Konstantinovich 10 2018 Inequality for the inner radii of symmetric non-overlapping domains. Zbl 1538.30102 Bakhtin, Aleksandr; Vyhivska, Liudmyla; Denega, Iryna 3 2018 Estimates of internal radii for non-intersecting domains. Zbl 1389.30104 Bakhtin, A. K. 10 2017 \(N\)-radial systems of points and problems for non-overlapping domains. Zbl 1369.30023 Bakhtin, Alexander; Vygivska, Lyudmila; Denega, I. 8 2017 Extremal decomposition of a complex plane with fixed poles. Zbl 1389.30105 Bakhtin, A. K.; Bakhtina, G. P.; Denega, I. V. 7 2017 Inequalities for the internal radii of non-overlapping domains. Zbl 1362.30038 Bakhtin, Aleksandr K.; Vygivska, Liudmyla V.; Denega, Iryna V. 5 2017 Estimates for the product of inner radii of five nonoverlapping domains. Zbl 1499.30219 Bakhtin, O. K.; Zabolotnyi, Ya. V.; Dvorak, I. Ya. 4 2017 Estimates of a product of the inner radii of nonoverlapping domains. Zbl 1390.30021 Bakhtin, Aleksandr Konstantinovich; Zabolotnyi, Yaroslav Vladimirovich 3 2017 Separating transformation and extremal decomposition of the complex plane. Zbl 1366.30020 Bakhtin, Aleksandr; Dvorak, Inna; Denega, Iryna 4 2016 A separating transformation in problems of extremal decomposition of the complex plane. Zbl 1363.30045 Bakhtin, A. K.; Dvorak, I. Ya.; Denega, I. V. 2 2015 On some inequalities in the theory of non-overlapping domains. Zbl 1313.30095 Bakhtin, O. K.; Bakhtina, G. P.; V’yun, V. E. 1 2014 On a problem of V. N. Dubinin. Zbl 1289.30143 Bakhtin, A. K.; Denega, I. V. 2 2013 Estimates of the product of the inner radii of three nonoverlapping domains. Zbl 1289.30145 Bakhtin, O. K.; Zabolotnyj, Ya. V. 1 2013 Addendum to a theorem on extremal decomposition of the complex plane. Zbl 1297.30044 Bakhtin, Alexandr; Denega, Iryna 13 2012 Analytic functions of vector argument and partially conformal mappings in multidimensional complex spaces. Zbl 1249.30131 Bakhtin, A. K. 3 2012 Method of separation transformation in the problem of maximum of product of powers of inner radiuses of non-overlapping domains. Zbl 1289.30146 Bakhtin, A. K.; Denega, I. V. 2 2012 Generalized \((n, d)\)-ray systems of points and inequalities for nonoverlapping domains and open sets. Zbl 1231.30012 Bakhtin, A. K.; Targonskii, A. L. 13 2011 Generalization of some results of the theory of schlicht functions to multidimensional complex spaces. Zbl 1240.30036 Bakhtin, A. K. 6 2011 Some properties of functionals for \(N\)-array systems of points. Zbl 1249.30081 Bakhtin, A. K.; Denega, I. V. 3 2011 Quadratic differentials and extremal problems of nonoverlapping domains. Zbl 1337.30033 Bakhtin, A. K.; Podvysotskii, R. V. 1 2011 Inequalities for the inner radii of nonoverlapping domains and open sets. Zbl 1224.30119 Bakhtin, O. K. 12 2009 Inequalities for inner radii of nonoverlapping domains. Zbl 1199.30143 Bakhtin, A. K.; Bakhtina, G. P.; Podvysotskij, R. V. 1 2009 Topological-algebraic structures and geometric methods in complex analysis. (Тополого-алгебраические структуры и геометрические методы в комплексном анализе.) Zbl 1199.30001 Bakhtin, A. K.; Bakhtina, G. P.; Zelinskiĭ, Yu. B. 65 2008 Quadratic differentials in problems of the product of inner radii of nonoverlapping domains. Zbl 1268.30034 Bakhtin, A. K.; V’yun, V. E. 1 2007 Application of a separating transformation to estimates of inner radii of open sets. Zbl 1164.30372 Bakhtin, A. K.; V’yun, V. E. 1 2007 Sharp estimates for inner radii of systems of nonoverlapping domains and open sets. Zbl 1164.30371 Bakhtin, A. K. 1 2007 Inequalities for the inner radii of non-overlapping domains. Zbl 1164.30373 Bakhtin, A. K.; V’yun, V. E.; Trokhimchuk, Yu. Yu. 1 2007 Some extremal problems in the theory of nonoverlapping domains with free poles on rays. Zbl 1112.30017 Bakhtin, A. K.; Targonskij, A. L. 10 2006 Separation transformation and problems on non-overlapping domains. Zbl 1199.30145 Bakhtina, G. P.; Bakhtin, A. K. 4 2006 Inequalities for the inner radii of nonoverlapping domains and open sets. Zbl 1120.30022 Bakhtin, A. K. 3 2006 Extremal problems of nonoverlapping domains with free poles on a circle. Zbl 1112.30016 Bakhtin, A. K. 2 2006 On some extremal problems of the geometric theory of functions of complex variable. Zbl 1120.30023 Bakhtin, A. K. 1 2006 Extremal problems and quadratic coefficients. Zbl 1107.30019 Bakhtin, A. K.; Targonskiy, A. L. 13 2005 Piecewise separating transformation and extremal problems with free poles. Zbl 1219.30012 Bakhtin, A. K. 4 2005 Extremal problems on nonoverlapping domains and quadratic differentials. Zbl 1091.30018 Bakhtin, A. K.; Bakhtina, G. P. 2 2005 Estimates of some functionals for open sets. Zbl 1107.30018 Bakhtin, A. K. 1 2005 A piecewise separating transformation and extremal problems with free poles on rays. Zbl 1066.30024 Bakhtin, A. K. 1 2004 On extremal problems for symmetric nonoverlapping domains. Zbl 0936.30019 Bakhtina, G. P.; Bakhtin, A. K. 3 1997 On the product of inner radii of symmetric nonoverlapping domains. Zbl 0936.30017 Bakhtin, A. K. 2 1997 Some properties of functions of class S. Zbl 0462.30012 Bakhtin, A. K. 1 1981 Some properties of functions of class S. Zbl 0467.30016 Bakhtin, A. K. 1 1981 all cited Publications top 5 cited Publications all top 5 Cited by 55 Authors 24 Bakhtin, Oleksandr Konstyantynovych 24 Denega, Iryna Viktorovna 11 Targonskij, Andriy L. 6 Vyhivska, Liudmyla Vyacheslavivna 4 Dubinin, Vladimir N. 4 Dvorak, Inna Yaroslavovna 4 Sevost’yanov, Yevgen Oleksandrovych 3 Zabolotnii, Yaroslav Volodymyrovych 3 Zabolotnyĭ, Ya. V. 3 Zabolotnyi, Yaroslav Vladimirovich 2 El-Ashwah, Rabha Mohamed 2 Klishchuk, Bogdan Anatol’evich 2 Salimov, Ruslan Radikovich 2 Targonskaya, Irina Igor’evna 2 Zelins’kyĭ, Yuriĭ Borysovych 1 Afanaseva-Grigoreva, Anna Sergeevna 1 Bondar, Serhiy 1 Çağlar, Murat 1 Chugaievska, Svitlana V. 1 Cotîrlă, Luminiţa-Ioana 1 Darus, Maslina 1 Dillies, Jimmy 1 Dmitrishin, Dmitry 1 Fırat, Atakan Hilmi 1 Gurusamy, Palpandy 1 Khan, Bilal 1 Kirillova, D. A. 1 Kota, Wafaa Y. 1 Kovtonyuk, D. A. 1 Kühnau, Reiner 1 Mahboobi, Mahdi 1 Pchelintsev, Evgeniĭ Anatol’evich 1 Pchelintsev, Valery Anatol’evich 1 Podvysotskii, R. V. 1 Prilepkina, Elena Gumarovna 1 Ryazanov, Vladimir Il’ich 1 Safonova, Ol’ga Vladimirovna 1 Sahin, Hasan 1 Shalini, Dasumahanthi 1 Shpakivskyi, Vitalii Stanislavovich 1 Sivasubramanian, Srikandan 1 Smorodin, Andrey 1 Srivastava, Hari Mohan 1 Stokolos, Alex 1 Tahir, Muhammad 1 Targonskaya, Iryna Igorivna 1 Targonskii, Valery 1 Vamshee Krishna, Deekonda 1 Vani, Nallamothu 1 Vaschenko, K. 1 Vygivska, Liudmyla V. 1 Vygivska, Lyudmila 1 Vygovskaya, L. V. 1 V’yun, V. E. 1 Yildiz, Ismet all top 5 Cited in 18 Serials 29 Journal of Mathematical Sciences (New York) 22 Ukrainian Mathematical Journal 4 Lobachevskii Journal of Mathematics 4 Proceedings of the International Geometry Center 3 Problemy Analiza. Issues of Analysis 2 Matematychni Studiï 2 Nonlinear Oscillations 1 Mathematical Notes 1 Annales Universitatis Mariae Curie-Skłodowska. Sectio A. Mathematica 1 Siberian Mathematical Journal 1 St. Petersburg Mathematical Journal 1 Journal of High Energy Physics 1 Computational Methods and Function Theory 1 Proceedings of the Steklov Institute of Mathematics 1 Dal’nevostochnyĭ Matematicheskiĭ Zhurnal 1 Eurasian Mathematical Journal 1 Azerbaijan Journal of Mathematics 1 Vestnik Tomskogo Gosudarstvennogo Universiteta. Matematika i Mekhanika all top 5 Cited in 10 Fields 73 Functions of a complex variable (30-XX) 7 Potential theory (31-XX) 3 Several complex variables and analytic spaces (32-XX) 3 Functional analysis (46-XX) 2 History and biography (01-XX) 1 Real functions (26-XX) 1 Operator theory (47-XX) 1 Differential geometry (53-XX) 1 General topology (54-XX) 1 Quantum theory (81-XX) Citations by Year Wikidata Timeline The data are displayed as stored in Wikidata under a Creative Commons CC0 License. Updates and corrections should be made in Wikidata.