Edit Profile (opens in new tab) de Jong, Aise Johan Co-Author Distance Author ID: de-jong.aise-johan Published as: de Jong, A. J.; de Jong, Aise Johan; de Jong, Johan; de Jong, A. Johan; De Jong, Johan; De Jong, A. J.; de Jong, J.; De Jong, Aise Johan more...less Homepage: http://www.math.columbia.edu/~dejong/ External Links: MGP · Wikidata · GND · IdRef Awards: EMS Prize (1996) Documents Indexed: 52 Publications since 1990, including 6 Additional arXiv Preprints 8 Contributions as Editor · 1 Further Contribution Biographic References: 2 Publications Co-Authors: 40 Co-Authors with 43 Joint Publications 1,351 Co-Co-Authors all top 5 Co-Authors 15 single-authored 9 Starr, Jason Michael 4 Faltings, Gerd 3 Jerison, David S. 3 Lusztig, George 3 Mazur, Barry 3 Oort, Frans 3 Schmid, Wilfried 3 Yau, Shing-Tung 2 Bhatt, Bhargav 2 Esnault, Hélène 2 Ho, Wei 2 Scholze, Peter 2 Steenbrink, Joseph H. M. 1 Abramovich, Dan 1 Alper, Jarod 1 Belmans, Pieter 1 Berthelot, Pierre 1 Conrad, Brian 1 de Jong, Theo 1 de Klerk, Etienne 1 Friedman, Robert D. 1 Gröchenig, Michael 1 He, Xuhua 1 Hoogenboom, J. Eduard 1 Illés, Tibor 1 Katz, Nicholas Michael 1 Lieblich, Max David 1 Messing, William 1 Noot, Rutger 1 Olander, Noah 1 Olsson, Martin C. 1 Perry, Alexander R. 1 Pikaart, Martin 1 Pink, Richard 1 Roos, Cornelis 1 Shepherd-Barron, Nicholas Ian 1 Shin, Minseon 1 Terlaky, Tamás 1 Valkó, J. 1 Van de Ven, Antonius 1 van der Put, Marius 1 van Geemen, Bert 1 Zhang, Shou-Wu all top 5 Serials 4 Documenta Mathematica 4 Oberwolfach Reports 3 Publications Mathématiques 3 Inventiones Mathematicae 3 Journal of Algebra 3 Journal of Algebraic Geometry 2 Israel Journal of Mathematics 2 American Journal of Mathematics 2 Duke Mathematical Journal 2 Illinois Journal of Mathematics 2 Mathematische Annalen 2 Journal of the American Mathematical Society 1 Annales de l’Institut Fourier 1 Annales Scientifiques de l’École Normale Supérieure. Quatrième Série 1 Bulletin de la Société Mathématique de France 1 Compositio Mathematica 1 Journal of Pure and Applied Algebra 1 Mathematische Zeitschrift 1 Topology 1 Transactions of the American Mathematical Society 1 Annals of Operations Research 1 Indagationes Mathematicae. New Series 1 Journal of Mathematical Sciences (New York) 1 Mathematical Research Letters 1 Moscow Mathematical Journal 1 London Mathematical Society Lecture Note Series all top 5 Fields 51 Algebraic geometry (14-XX) 8 General and overarching topics; collections (00-XX) 8 Number theory (11-XX) 4 Commutative algebra (13-XX) 3 Associative rings and algebras (16-XX) 3 Category theory; homological algebra (18-XX) 2 Several complex variables and analytic spaces (32-XX) 1 Group theory and generalizations (20-XX) 1 Real functions (26-XX) 1 Differential geometry (53-XX) 1 Operations research, mathematical programming (90-XX) Publications by Year all cited Publications top 5 cited Publications Citations contained in zbMATH Open 46 Publications have been cited 1,060 times in 895 Documents Cited by ▼ Year ▼ Smoothness, semi-stability and alterations. Zbl 0916.14005 de Jong, A. J. 317 1996 Crystalline Dieudonné module theory via formal and rigid geometry. Zbl 0864.14009 de Jong, A. J. 120 1995 Finiteness and cohomological purity in rigid cohomology (with an appendix by Aise Johan de Jong). (Finitude et pureté cohomologique en cohomologie rigide (avec un appendice par Aise Johan de Jong).) Zbl 0908.14005 Berthelot, Pierre 68 1997 Families of curves and alterations. Zbl 0868.14012 de Jong, A. Johan 52 1997 The period-index problem for the Brauer group of an algebraic surface. Zbl 1060.14025 de Jong, A. J. 52 2004 Homomorphisms of Barsotti-Tate groups and crystals in positive characteristic. – Erratum. Zbl 0929.14029 de Jong, A. J. 38 1998 Étale fundamental groups of non-Archimedean analytic spaces. Zbl 0864.14012 de Jong, A. J. 38 1995 Purity of the stratification by Newton polygons. Zbl 0954.14007 de Jong, A. J.; Oort, F. 36 2000 The moduli spaces of principally polarized abelian varieties with \(\Gamma_ 0(p)\)-level structure. Zbl 0816.14020 de Jong, A. J. 32 1993 Étale cohomology of rigid analytic spaces. Zbl 0922.14012 de Jong, Johan; van der Put, Marius 29 1996 Every rationally connected variety over the function field of a curve has a rational point. Zbl 1063.14025 de Jong, A. J.; Starr, J. 26 2003 A conjecture on arithmetic fundamental groups. Zbl 1054.11032 de Jong, A. J. 26 2001 Stacks project expository collection (SPEC). Zbl 1504.14004 25 2022 Families of rationally simply connected varieties over surfaces and torsors for semisimple groups. Zbl 1285.14053 de Jong, A. J.; He, Xuhua; Starr, Jason Michael 24 2011 Jacobians with complex multiplication. Zbl 0732.14014 de Jong, Johan; Noot, Rutger 23 1991 Smoothness, semistability, and toroidal geometry. Zbl 0906.14006 Abramovich, D.; de Jong, A. J. 23 1997 Cubic fourfolds and spaces of rational curves. Zbl 1081.14007 de Jong, A. J.; Starr, Jason 19 2004 On extending families of curves. Zbl 0922.14017 de Jong, A. J.; Oort, F. 17 1997 Higher Fano manifolds and rational surfaces. Zbl 1124.14039 De Jong, A. J.; Starr, Jason 15 2007 Approximation of versal deformations. Zbl 1087.14004 Conrad, Brian; de Jong, A. J. 14 2002 Moduli of curves with non-abelian level structure. Zbl 0860.14024 Pikaart, M.; de Jong, A. J. 14 1995 Generic abelian varieties with real multiplication are not Jacobians. Zbl 1138.14027 de Jong, Johan; Zhang, Shou-Wu 14 2007 Counting elliptic surfaces over finite fields. Zbl 1031.11033 de Jong, A. J. 11 2002 Finite locally free group schemes in characteristic \(p\) and Dieudonné modules. Zbl 0812.14030 de Jong, A. J. 11 1993 On the Burkhardt quartic. Zbl 0712.14023 de Jong, A. J.; Shepherd-Barron, N. I.; Van de Ven, A. 11 1990 Almost proper GIT-stacks and discriminant avoidance. Zbl 1210.14013 Starr, Jason; De Jong, Johan 9 2010 The moduli spaces of polarized abelian varieties. Zbl 0839.14036 de Jong, A. J. 8 1993 On Hitchin’s connection. Zbl 0920.32017 van Geemen, Bert; de Jong, Aise Johan 8 1998 Monodromy and the Tate conjecture: Picard numbers and Mordell-Weil ranks in families. Zbl 1067.14504 de Jong, A. Johan; Katz, Nicholas M. 7 2000 Proof of a conjecture of W. Veys. Zbl 0857.14019 de Jong, A. J.; Steenbrink, J. H. M. 5 1995 Crystalline Dieudonné theory over excellent schemes. Zbl 0963.14008 de Jong, Aise Johan; Messing, William 5 1999 Lefschetz for local Picard groups. (Lefschetz pour les groupes de Picard locaux.) Zbl 1372.14007 Bhatt, Bhargav; De Jong, Aise Johan 5 2014 Barsotti-Tate groups and crystals. Zbl 0919.14029 de Jong, A. J. 5 1998 Genus one curves and Brauer-Severi varieties. Zbl 1287.14009 Ho, Wei; de Jong, Aise Johan 3 2012 Invariant rings through categories. Zbl 1282.13011 Alper, Jarod; de Jong, A. J. 2 2013 The virtual number of \(D_ \infty\) points. II. Zbl 0752.32011 de Jong, Johan; de Jong, Theo 2 1990 Current developments in mathematics 2000. Zbl 0990.00013 2 2001 Optimization of nuclear reactor reloading patterns. Zbl 0880.90094 de Klerk, E.; Roos, C.; Terlaky, T.; Illés, T.; de Jong, A. J.; Valkó, J.; Hoogenboom, J. E. 2 1997 Picard numbers of surfaces in 3-dimensional weighted projective spaces. Zbl 0695.14016 de Jong, A. J.; Steenbrink, J. H. M. 2 1991 Divisor classes and the virtual canonical bundle for genus 0 maps. Zbl 1407.14019 De Jong, A. J.; Starr, Jason 2 2017 Ample line bundles and intersection theory. Zbl 0811.14005 de Jong, Johan 1 1993 Erratum: Cubic fourfolds and spaces of rational curves. Zbl 1162.14302 de Jong, A. J.; Starr, Jason 1 2008 On the geometry of principal homogeneous spaces. Zbl 1232.14021 de Jong, A. J.; Friedman, Robert 1 2011 A result on formal linearity. Zbl 0974.14032 de Jong, A. J. 1 2000 Current developments in mathematics, 2003. Zbl 1090.00008 1 2003 On weakly étale morphisms. Zbl 1529.14013 de Jong, Aise Johan; Olander, Noah 1 2024 On weakly étale morphisms. Zbl 1529.14013 de Jong, Aise Johan; Olander, Noah 1 2024 Stacks project expository collection (SPEC). Zbl 1504.14004 25 2022 Divisor classes and the virtual canonical bundle for genus 0 maps. Zbl 1407.14019 De Jong, A. J.; Starr, Jason 2 2017 Lefschetz for local Picard groups. (Lefschetz pour les groupes de Picard locaux.) Zbl 1372.14007 Bhatt, Bhargav; De Jong, Aise Johan 5 2014 Invariant rings through categories. Zbl 1282.13011 Alper, Jarod; de Jong, A. J. 2 2013 Genus one curves and Brauer-Severi varieties. Zbl 1287.14009 Ho, Wei; de Jong, Aise Johan 3 2012 Families of rationally simply connected varieties over surfaces and torsors for semisimple groups. Zbl 1285.14053 de Jong, A. J.; He, Xuhua; Starr, Jason Michael 24 2011 On the geometry of principal homogeneous spaces. Zbl 1232.14021 de Jong, A. J.; Friedman, Robert 1 2011 Almost proper GIT-stacks and discriminant avoidance. Zbl 1210.14013 Starr, Jason; De Jong, Johan 9 2010 Erratum: Cubic fourfolds and spaces of rational curves. Zbl 1162.14302 de Jong, A. J.; Starr, Jason 1 2008 Higher Fano manifolds and rational surfaces. Zbl 1124.14039 De Jong, A. J.; Starr, Jason 15 2007 Generic abelian varieties with real multiplication are not Jacobians. Zbl 1138.14027 de Jong, Johan; Zhang, Shou-Wu 14 2007 The period-index problem for the Brauer group of an algebraic surface. Zbl 1060.14025 de Jong, A. J. 52 2004 Cubic fourfolds and spaces of rational curves. Zbl 1081.14007 de Jong, A. J.; Starr, Jason 19 2004 Every rationally connected variety over the function field of a curve has a rational point. Zbl 1063.14025 de Jong, A. J.; Starr, J. 26 2003 Current developments in mathematics, 2003. Zbl 1090.00008 1 2003 Approximation of versal deformations. Zbl 1087.14004 Conrad, Brian; de Jong, A. J. 14 2002 Counting elliptic surfaces over finite fields. Zbl 1031.11033 de Jong, A. J. 11 2002 A conjecture on arithmetic fundamental groups. Zbl 1054.11032 de Jong, A. J. 26 2001 Current developments in mathematics 2000. Zbl 0990.00013 2 2001 Purity of the stratification by Newton polygons. Zbl 0954.14007 de Jong, A. J.; Oort, F. 36 2000 Monodromy and the Tate conjecture: Picard numbers and Mordell-Weil ranks in families. Zbl 1067.14504 de Jong, A. Johan; Katz, Nicholas M. 7 2000 A result on formal linearity. Zbl 0974.14032 de Jong, A. J. 1 2000 Crystalline Dieudonné theory over excellent schemes. Zbl 0963.14008 de Jong, Aise Johan; Messing, William 5 1999 Homomorphisms of Barsotti-Tate groups and crystals in positive characteristic. – Erratum. Zbl 0929.14029 de Jong, A. J. 38 1998 On Hitchin’s connection. Zbl 0920.32017 van Geemen, Bert; de Jong, Aise Johan 8 1998 Barsotti-Tate groups and crystals. Zbl 0919.14029 de Jong, A. J. 5 1998 Finiteness and cohomological purity in rigid cohomology (with an appendix by Aise Johan de Jong). (Finitude et pureté cohomologique en cohomologie rigide (avec un appendice par Aise Johan de Jong).) Zbl 0908.14005 Berthelot, Pierre 68 1997 Families of curves and alterations. Zbl 0868.14012 de Jong, A. Johan 52 1997 Smoothness, semistability, and toroidal geometry. Zbl 0906.14006 Abramovich, D.; de Jong, A. J. 23 1997 On extending families of curves. Zbl 0922.14017 de Jong, A. J.; Oort, F. 17 1997 Optimization of nuclear reactor reloading patterns. Zbl 0880.90094 de Klerk, E.; Roos, C.; Terlaky, T.; Illés, T.; de Jong, A. J.; Valkó, J.; Hoogenboom, J. E. 2 1997 Smoothness, semi-stability and alterations. Zbl 0916.14005 de Jong, A. J. 317 1996 Étale cohomology of rigid analytic spaces. Zbl 0922.14012 de Jong, Johan; van der Put, Marius 29 1996 Crystalline Dieudonné module theory via formal and rigid geometry. Zbl 0864.14009 de Jong, A. J. 120 1995 Étale fundamental groups of non-Archimedean analytic spaces. Zbl 0864.14012 de Jong, A. J. 38 1995 Moduli of curves with non-abelian level structure. Zbl 0860.14024 Pikaart, M.; de Jong, A. J. 14 1995 Proof of a conjecture of W. Veys. Zbl 0857.14019 de Jong, A. J.; Steenbrink, J. H. M. 5 1995 The moduli spaces of principally polarized abelian varieties with \(\Gamma_ 0(p)\)-level structure. Zbl 0816.14020 de Jong, A. J. 32 1993 Finite locally free group schemes in characteristic \(p\) and Dieudonné modules. Zbl 0812.14030 de Jong, A. J. 11 1993 The moduli spaces of polarized abelian varieties. Zbl 0839.14036 de Jong, A. J. 8 1993 Ample line bundles and intersection theory. Zbl 0811.14005 de Jong, Johan 1 1993 Jacobians with complex multiplication. Zbl 0732.14014 de Jong, Johan; Noot, Rutger 23 1991 Picard numbers of surfaces in 3-dimensional weighted projective spaces. Zbl 0695.14016 de Jong, A. J.; Steenbrink, J. H. M. 2 1991 On the Burkhardt quartic. Zbl 0712.14023 de Jong, A. J.; Shepherd-Barron, N. I.; Van de Ven, A. 11 1990 The virtual number of \(D_ \infty\) points. II. Zbl 0752.32011 de Jong, Johan; de Jong, Theo 2 1990 all cited Publications top 5 cited Publications all top 5 Cited by 816 Authors 11 Caro, Daniel 10 Abramovich, Dan 10 Böckle, Gebhard 10 de Jong, Aise Johan 10 Kedlaya, Kiran Sridhara 10 Kisin, Mark 9 Temkin, Michael 8 Esnault, Hélène 8 Lieblich, Max David 8 Saito, Takeshi 8 Viehmann, Eva 8 Yu, Chia-Fu 7 Bhatt, Bhargav 7 Cutkosky, Steven Dale 7 Hartl, Urs T. 7 Khare, Chandrashekhar 7 Oort, Frans 7 Pilloni, Vincent 7 Scholze, Peter 6 Antieau, Benjamin 6 Gubler, Walter Bruno 6 Kahn, Bruno 6 Krashen, Daniel 6 Nicaise, Johannes 6 Olsson, Martin C. 6 Pappas, Georgios 6 Piltant, Olivier 6 Starr, Jason Michael 6 Tschinkel, Yuri 6 Vasiu, Adrian 5 Chipchakov, Ivan D. 5 Conrad, Brian 5 Frediani, Paola 5 Fulger, Mihai 5 Harashita, Shushi 5 Harbater, David 5 Hassett, Brendan 5 Hellmann, Eugen 5 Lazda, Christopher 5 Moonen, Ben 5 Pál, Ambrus 5 Werner, Annette 5 Włodarczyk, Jarosław 5 Zuo, Kang 4 Achter, Jeffrey D. 4 Auel, Asher Natan 4 Biswas, Indranil 4 Fakhruddin, Najmuddin 4 Gee, Toby 4 Ghigi, Alessandro 4 Görtz, Ulrich 4 Haines, Thomas J. 4 Hall, Jack 4 Hamacher, Paul 4 Hansen, David 4 Hartmann, Julia 4 Hida, Haruzo 4 Holmes, David 4 Illusie, Luc 4 Keeler, Dennis Shawn 4 Kerz, Moritz C. 4 Kim, Wansu 4 Kovács, Sándor J. 4 Krishnamoorthy, Raju 4 Lara, Marcin 4 Lau, Eike 4 Lehmann, Brian 4 Liu, Ruochuan 4 Newton, James 4 Patakfalvi, Zsolt 4 Schmidt, Tobias 4 Schraen, Benjamin 4 Schwede, Karl E. 4 Stroh, Benoît 4 Tanaka, Hiromu 4 Tsuzuki, Nobuo 4 Vezzani, Alberto 4 Xu, Chenyang 4 Zhu, Xinwen 3 Aizenbud, Avraham 3 Alper, Jarod 3 Andreatta, Fabrizio 3 Araujo, Carolina 3 Baldassarri, Francesco 3 Beheshti, Roya 3 Bellovin, Rebecca 3 Bernasconi, Fabio 3 Bondarko, Mikhail Vladimirovich 3 Breuil, Christophe 3 Castravet, Ana-Maria 3 Česnavičius, Kęstutis 3 Chai, Chingli 3 Cheltsov, Ivan Anatol’evich 3 Chen, Miaofen 3 Chiarellotto, Bruno 3 Colmez, Pierre 3 Cossart, Vincent 3 Drinfeld, Vladimir Gershonovich 3 Ejiri, Sho 3 Encinas, Santiago ...and 716 more Authors all top 5 Cited in 136 Serials 51 Compositio Mathematica 40 Duke Mathematical Journal 40 Journal of Algebra 40 Mathematische Annalen 38 Inventiones Mathematicae 37 Advances in Mathematics 31 Journal of Algebraic Geometry 27 Manuscripta Mathematica 26 Mathematische Zeitschrift 26 Transactions of the American Mathematical Society 26 Annals of Mathematics. Second Series 26 Journal of the Institute of Mathematics of Jussieu 23 Journal für die Reine und Angewandte Mathematik 23 Algebra & Number Theory 22 Journal of the American Mathematical Society 19 Annales de l’Institut Fourier 19 Journal of Number Theory 17 Forum of Mathematics, Sigma 15 Publications Mathématiques 13 Documenta Mathematica 12 Israel Journal of Mathematics 11 Journal of Pure and Applied Algebra 11 Rendiconti del Seminario Matematico della Università di Padova 11 Comptes Rendus. Mathématique. Académie des Sciences, Paris 10 Bulletin de la Société Mathématique de France 10 Journal de Théorie des Nombres de Bordeaux 9 Annales Scientifiques de l’École Normale Supérieure. Quatrième Série 9 Michigan Mathematical Journal 9 Journal of the European Mathematical Society (JEMS) 7 Proceedings of the American Mathematical Society 7 Bulletin of the American Mathematical Society. New Series 7 Selecta Mathematica. New Series 6 Communications in Algebra 6 Bulletin of the London Mathematical Society 5 Journal of the London Mathematical Society. Second Series 5 Proceedings of the London Mathematical Society. Third Series 5 International Journal of Mathematics 5 Journal de l’École Polytechnique – Mathématiques 4 Acta Mathematica Vietnamica 4 Pacific Journal of Mathematics 4 Publications of the Research Institute for Mathematical Sciences, Kyoto University 4 Tôhoku Mathematical Journal. Second Series 4 Journal de Mathématiques Pures et Appliquées. Neuvième Série 4 Transformation Groups 4 Geometry & Topology 4 Oberwolfach Reports 3 Mathematical Proceedings of the Cambridge Philosophical Society 3 Mathematische Nachrichten 3 Nagoya Mathematical Journal 3 Indagationes Mathematicae. New Series 3 Taiwanese Journal of Mathematics 3 Advances in Geometry 3 Annali della Scuola Normale Superiore di Pisa. Classe di Scienze. Serie V 3 International Journal of Number Theory 3 Journal of \(K\)-Theory 3 Japanese Journal of Mathematics. 3rd Series 3 Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A: Matemáticas. RACSAM 3 Research in Number Theory 3 Tunisian Journal of Mathematics 2 Communications in Mathematical Physics 2 Journal of Geometry and Physics 2 Acta Arithmetica 2 Geometriae Dedicata 2 Memoirs of the American Mathematical Society 2 Rendiconti del Circolo Matemàtico di Palermo. Serie II 2 Revista Matemática Iberoamericana 2 Forum Mathematicum 2 Sugaku Expositions 2 IMRN. International Mathematics Research Notices 2 Proceedings of the Indian Academy of Sciences. Mathematical Sciences 2 Annales de la Faculté des Sciences de Toulouse. Mathématiques. Série VI 2 Bulletin des Sciences Mathématiques 2 Revista Matemática Complutense 2 Communications in Contemporary Mathematics 2 Milan Journal of Mathematics 2 Kyoto Journal of Mathematics 2 Forum of Mathematics, Pi 2 Annales Mathématiques du Québec 2 European Journal of Mathematics 2 Annals of \(K\)-Theory 2 Annales Henri Lebesgue 1 Houston Journal of Mathematics 1 Journal of Mathematical Physics 1 Letters in Mathematical Physics 1 Arkiv för Matematik 1 Abhandlungen aus dem Mathematischen Seminar der Universität Hamburg 1 Acta Mathematica 1 American Journal of Mathematics 1 Annali di Matematica Pura ed Applicata. Serie Quarta 1 Canadian Journal of Mathematics 1 Canadian Mathematical Bulletin 1 Collectanea Mathematica 1 Glasgow Mathematical Journal 1 Illinois Journal of Mathematics 1 Information Sciences 1 International Journal of Mathematics and Mathematical Sciences 1 Journal of Differential Geometry 1 Journal of the Indian Institute of Science 1 Journal of the Korean Mathematical Society 1 Journal of the Mathematical Society of Japan ...and 36 more Serials all top 5 Cited in 33 Fields 776 Algebraic geometry (14-XX) 321 Number theory (11-XX) 63 Commutative algebra (13-XX) 54 Several complex variables and analytic spaces (32-XX) 42 Group theory and generalizations (20-XX) 39 Field theory and polynomials (12-XX) 37 \(K\)-theory (19-XX) 34 Associative rings and algebras (16-XX) 25 Category theory; homological algebra (18-XX) 19 Topological groups, Lie groups (22-XX) 16 Algebraic topology (55-XX) 13 Differential geometry (53-XX) 10 Dynamical systems and ergodic theory (37-XX) 7 General and overarching topics; collections (00-XX) 7 Manifolds and cell complexes (57-XX) 6 Mathematical logic and foundations (03-XX) 6 Nonassociative rings and algebras (17-XX) 5 Global analysis, analysis on manifolds (58-XX) 3 History and biography (01-XX) 3 Convex and discrete geometry (52-XX) 3 Quantum theory (81-XX) 2 Linear and multilinear algebra; matrix theory (15-XX) 2 Partial differential equations (35-XX) 1 Combinatorics (05-XX) 1 Functions of a complex variable (30-XX) 1 Abstract harmonic analysis (43-XX) 1 Operator theory (47-XX) 1 Calculus of variations and optimal control; optimization (49-XX) 1 Probability theory and stochastic processes (60-XX) 1 Numerical analysis (65-XX) 1 Computer science (68-XX) 1 Fluid mechanics (76-XX) 1 Operations research, mathematical programming (90-XX) Citations by Year Wikidata Timeline The data are displayed as stored in Wikidata under a Creative Commons CC0 License. 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