Edit Profile (opens in new tab) Schmüdgen, Konrad Co-Author Distance Author ID: schmudgen.konrad Published as: Schmüdgen, Konrad; Schmüdgen, K.; Schmuedgen, Konrad more...less Homepage: http://www.math.uni-leipzig.de/MI/schmuedgen/ External Links: MGP · Wikidata · GND · IdRef Documents Indexed: 112 Publications since 1975, including 7 Books 1 Contribution as Editor Co-Authors: 22 Co-Authors with 34 Joint Publications 965 Co-Co-Authors all top 5 Co-Authors 79 single-authored 5 Schüler, Axel 5 Wagner, Elmar 4 Savchuk, Yuri 3 di Dio, Philipp J. 3 Heckenberger, István 2 Friedrich, Jürgen 2 Malamud, Mark M. 2 Ôta, Schôichi 2 Putinar, Mihai 1 Apel, Joachim 1 Cimprič, Jaka 1 Curto, Raúl Enrique 1 de Snoo, Hendrik S. V. 1 Gazeau, Jean-Pierre 1 Gebhardt, René 1 Gesztesy, Fritz 1 Horzela, Andrzej 1 Klimyk, Anatoliy Ul’yanovich 1 Moslehian, Mohammad Sal 1 Mourrain, Bernard 1 Ostrovskyĭ, Vasyl L. 1 Stochel, Jan all top 5 Serials 6 Journal of Functional Analysis 6 Mathematische Nachrichten 5 Communications in Mathematical Physics 5 Reports on Mathematical Physics 5 Proceedings of the American Mathematical Society 5 Journal of Operator Theory 4 Letters in Mathematical Physics 4 Bulletin of the London Mathematical Society 4 Integral Equations and Operator Theory 4 Journal für die Reine und Angewandte Mathematik 3 Journal of Mathematical Analysis and Applications 3 Journal of Geometry and Physics 3 Acta Scientiarum Mathematicarum 3 Mathematische Annalen 3 Zeitschrift für Analysis und ihre Anwendungen 3 Seminar Sophus Lie 3 Wissenschaftliche Zeitschrift der Karl-Marx-Universität Leipzig, Mathematisch-Naturwissenschaftliche Reihe 3 Graduate Texts in Mathematics 2 Journal of Mathematical Physics 2 Arkiv för Matematik 2 Mathematische Zeitschrift 2 Publications of the Research Institute for Mathematical Sciences, Kyoto University 2 International Journal of Mathematics 2 Algebras and Representation Theory 1 Acta Mathematica Academiae Scientiarum Hungaricae 1 Communications in Algebra 1 Israel Journal of Mathematics 1 Revue Roumaine de Mathématiques Pures et Appliquées 1 Archiv der Mathematik 1 Indiana University Mathematics Journal 1 Manuscripta Mathematica 1 Transactions of the American Mathematical Society 1 Linear Algebra and its Applications 1 Comptes Rendus de l’Académie des Sciences. Série I 1 Journal of Lie Theory 1 Documenta Mathematica 1 Doklady Mathematics 1 Methods of Functional Analysis and Topology 1 Czechoslovak Journal of Physics 1 Operator Theory: Advances and Applications 1 Advances in Operator Theory 1 Texts and Monographs in Physics all top 5 Fields 65 Operator theory (47-XX) 46 Functional analysis (46-XX) 28 Nonassociative rings and algebras (17-XX) 26 Quantum theory (81-XX) 15 Integral transforms, operational calculus (44-XX) 14 Algebraic geometry (14-XX) 14 Associative rings and algebras (16-XX) 10 Global analysis, analysis on manifolds (58-XX) 5 Number theory (11-XX) 5 Topological groups, Lie groups (22-XX) 3 Partial differential equations (35-XX) 2 Linear and multilinear algebra; matrix theory (15-XX) 2 Functions of a complex variable (30-XX) 2 Harmonic analysis on Euclidean spaces (42-XX) 2 Abstract harmonic analysis (43-XX) 1 General and overarching topics; collections (00-XX) 1 History and biography (01-XX) 1 Commutative algebra (13-XX) 1 Group theory and generalizations (20-XX) 1 Measure and integration (28-XX) 1 Ordinary differential equations (34-XX) 1 Differential geometry (53-XX) 1 Fluid mechanics (76-XX) 1 Statistical mechanics, structure of matter (82-XX) 1 Relativity and gravitational theory (83-XX) Publications by Year all cited Publications top 5 cited Publications Citations contained in zbMATH Open 95 Publications have been cited 1,569 times in 1,240 Documents Cited by ▼ Year ▼ Quantum groups and their representations. Zbl 0891.17010Klimyk, Anatoli; Schmüdgen, Konrad 328 1997 Unbounded self-adjoint operators on Hilbert space. Zbl 1257.47001Schmüdgen, Konrad 328 2012 The \(K\)-moment problem for compact semi-algebraic sets. Zbl 0744.44008Schmüdgen, Konrad 187 1991 The moment problem. Zbl 1383.44004Schmüdgen, Konrad 80 2017 Unbounded operator algebras and representation theory. Lizenzausg. d. Akademie Verl., Berlin. Zbl 0697.47048Schmüdgen, Konrad 57 1989 Noncommutative real algebraic geometry – some basic concepts and first ideas. Zbl 1158.13313Schmüdgen, Konrad 32 2009 On the moment problem of closed semi-algebraic sets. Zbl 1047.47012Schmüdgen, Konrad 31 2003 An example of a positive polynomial which is not a sum of squares of polynomials. A positive, but not strongly positive functional. Zbl 0424.46041Schmüdgen, Konrad 26 1979 On the Heisenberg commutation relation. I. Zbl 0507.47010Schmuedgen, Konrad 20 1983 On the Heisenberg commutation relation. II. Zbl 0557.47023Schmüdgen, Konrad 20 1983 Dirac operator and a twisted cyclic cocycle on the standard Podleś quantum sphere. Zbl 1067.46070Schmüdgen, Konrad; Wagner, Elmar 20 2004 On trace representation of linear functionals on unbounded operator algebras. Zbl 0398.47027Schmüdgen, Konrad 18 1978 A strict Positivstellensatz for the Weyl algebra. Zbl 1137.47030Schmüdgen, Konrad 18 2005 The multidimensional truncated moment problem: atoms, determinacy, and core variety. Zbl 1451.44007di Dio, Philipp J.; Schmüdgen, Konrad 16 2018 Über \(LMC^*\)-Algebren. Zbl 0315.46042Schmüdgen, Konrad 15 1975 Integrable operator representations of \(\mathbb{R}_ q^ 2\), \(X_{q,\gamma}\) and \(SL_ q(2,\mathbb{R})\). Zbl 0822.46064Schmüdgen, Konrad 15 1994 Spectral theory of Schrödinger operators with infinitely many point interactions and radial positive definite functions. Zbl 1256.35030Malamud, Mark M.; Schmüdgen, Konrad 14 2012 On some classes of unbounded operators. Zbl 0683.47031Ôta, Schôichi; Schmüdgen, Konrad 13 1989 A formally normal operator having no normal extension. Zbl 0613.47002Schmüdgen, Konrad 13 1985 Multivariate determinateness. Zbl 1166.44004Putinar, Mihai; Schmüdgen, Konrad 13 2008 The order structure of topological \(^*\)-algebras of unbounded operators. I. Zbl 0318.46067Schmüdgen, Konrad 12 1975 Positive cones in enveloping algebras. Zbl 0424.46040Schmüdgen, Konrad 11 1978 Classification of three-dimensional covariant differential calculi on Podles’ quantum spheres and on related spaces. Zbl 0811.17019Apel, Joachim; Schmüdgen, Konrad 11 1994 Commutator representations of differential calculi on the quantum group \(SU_q(2)\). Zbl 1016.17014Schmüdgen, Konrad 11 1999 Classification of bicovariant differential calculi on the quantum groups SL\(_q(n+1)\) and Sp\(_q(2n)\). Zbl 0933.17007Heckenberger, I.; Schmüdgen, K. 10 1998 A strict Positivstellensatz for enveloping algebras. Zbl 1131.14061Schmüdgen, Konrad 9 2006 The multidimensional truncated moment problem: Carathéodory numbers. Zbl 1404.44013di Dio, Philipp J.; Schmüdgen, Konrad 9 2018 Unbounded induced representations of \(\ast \)-algebras. Zbl 1410.16037Savchuk, Yurii; Schmüdgen, Konrad 9 2013 Levi-Civita connections on the quantum groups \(SL_ q(N), O_ q(N)\) and \(Sp_ q(N)\). Zbl 0888.17007Heckenberger, István; Schmüdgen, Konrad 8 1997 n-positivity of unbounded *-representations. Zbl 0701.47025Friedrich, Jürgen; Schmüdgen, Konrad 8 1989 On commuting unbounded self-adjoint operators. I. Zbl 0576.47014Schmüdgen, Konrad 7 1984 On topologization of unbounded operator algebras. Zbl 0475.47030Schmuedgen, Konrad 7 1980 On domains of powers of closed symmetric operators. Zbl 0507.47009Schmuedgen, Konrad 7 1983 Classification of bicovariant differential calculi on quantum groups of type \(A, B, C\) and \(D\). Zbl 0835.17012Schmüdgen, Konrad; Schüler, Axel 7 1995 Classification of bicovariant differential calculi on quantum groups. Zbl 0846.17017Schmüdgen, Konrad; Schüler, Axel 7 1995 Operator representations of \(\mathcal{U}_ q(sl_ 2(\mathbb{R}))\). Zbl 0862.17012Schmüdgen, Konrad 7 1996 On well-behaved unbounded representations of \(*\)-algebras. Zbl 1019.47050Schmüdgen, Konrad 7 2002 On determinacy notions for the two dimensional moment problem. Zbl 0762.44004Schmüdgen, Konrad 6 1991 Representations of crossed product algebras of Podleś quantum spheres. Zbl 1152.46058Schmüdgen, Konrad; Wagner, Elmar 6 2007 Hilbert space representations of cross product algebras. Zbl 1029.46110Schmüdgen, Konrad; Wagner, Elmar 6 2003 Non-commutative covariant differential calculi on quantum spaces and quantum groups. Zbl 0760.17013Schmüdgen, Konrad 5 1991 Left-covariant differential calculi on \(\mathrm{SL}_q(2)\) and \(\mathrm{SL}_q(3)\). Zbl 0879.17004Schmüdgen, Konrad; Schüler, Axel 5 1996 Covariant differential calculi on quantum spaces and on quantum groups. Zbl 0795.17019Schmüdgen, Konrad; Schüler, Axel 5 1993 The multi-dimensional truncated moment problem: maximal masses. Zbl 1363.44005Schmüdgen, Konrad 4 2015 Algebras of fractions and strict Positivstellensätze for \(*\)-algebras. Zbl 1209.47034Schmüdgen, Konrad 4 2010 Graded and filtrated topological \({}^*\)-algebras. II: The closure of the positive cone. Zbl 0545.46031Schmüdgen, Konrad 4 1984 Graded and filtrated topological *-algebras. I: Graded normal topologies. Zbl 0553.46046Schmüdgen, Konrad 4 1980 Non-commutative moment problems. Zbl 0712.22010Schmüdgen, Konrad 4 1991 Operator representations of \(\mathbb{R}_ q^ 2\). Zbl 0804.47049Schmüdgen, Konrad 4 1992 Positivstellensätze for algebras of matrices. Zbl 1250.15034Savchuk, Yurii; Schmüdgen, Konrad 4 2012 Some selfadjoint \(2\times 2\) operator matrices associated with closed operators. Zbl 1032.47014Ôta, Schôichi; Schmüdgen, K. 4 2003 Examples of twisted cyclic cocycles from covariant differential calculi. Zbl 1059.58007Schmüdgen, Konrad; Wagner, Elmar 4 2003 On a generalization of the classical moment problem. Zbl 0642.44005Schmüdgen, Konrad 4 1987 On commuting unbounded self-adjoint operators. IV. Zbl 0649.47023Schmüdgen, Konrad 4 1986 An invitation to unbounded representations of \(*\)-algebras on Hilbert space. Zbl 1458.47002Schmüdgen, Konrad 4 2020 Flat extensions in \(\ast\)-algebras. Zbl 1364.46047Mourrain, Bernard; Schmüdgen, Konrad 3 2016 Lokal multiplikativ konvexe \(Op^*\)-Algebren. Zbl 0392.46032Schmüdgen, Konrad 3 1978 Spaces of continuous sesquilinear forms associated with unbounded operator algebras. Zbl 0675.47047Schmüdgen, K. 3 1988 On commuting unbounded self-adjoint operators. II. Zbl 0576.47015Schmüdgen, Konrad; Friedrich, J. 3 1984 Operator representations of the real twisted canonical commutation relations. Zbl 0805.47039Schmüdgen, Konrad 3 1994 A proof of a theorem on trace representation of strongly positive linear functionals on Op*-algebras. Zbl 0443.47044Schmüdgen, Konrad 3 1979 Uniform topologies and strong operator topologies of polynomial algebras and on the algebra of CCR. Zbl 0355.46053Schmüdgen, Konrad 3 1976 Strongly commuting selfadjoint operators and commutants of unbounded operator algebras. Zbl 0652.47027Schmüdgen, Konrad 3 1988 On a theorem of Z. Sebestyén and Zs. Tarcsay. Zbl 1438.47040Gesztesy, Fritz; Schmüdgen, Konrad 3 2019 Unbounded operators on Hilbert \(C^\ast\)-modules. Zbl 1341.46033Gebhardt, René; Schmüdgen, Konrad 2 2015 Unbounded commutants and intertwining spaces of unbounded symmetric operators and *-representations. Zbl 0624.47016Schmüdgen, Konrad 2 1987 On restrictions of unbounded symmetric operators. Zbl 0545.47015Schmüdgen, Konrad 2 1984 Lokal multiplikativ konvexe \(Op^*\)-Algebren. Zbl 0319.46035Schmüdgen, Konrad 2 1978 Left-covariant differential calculi on \(SL_ q(N)\). Zbl 0882.58005Schmüdgen, Konrad; Schüler, Axel 2 1997 An operator-theoretic approach to a cocycle problem in the complex plane. Zbl 0867.47020Schmüdgen, Konrad 2 1995 Commutative and non-commutative moment problems. Zbl 0821.47013Schmüdgen, K. 2 1992 Operator representations of a \(q\)-deformed Heisenberg algebra. Zbl 0978.81047Schmüdgen, Konrad 2 1999 Hilbert space representations of cross product algebras. II. Zbl 1160.46331Schmüdgen, Konrad; Wagner, Elmar 2 2006 A noncommutative version of the Fejér-Riesz theorem. Zbl 1189.47022Savchuk, Yuriĭ; Schmüdgen, Konrad 2 2010 On the infinite-dimensional moment problem. Zbl 1425.44004Schmüdgen, Konrad 2 2018 The quantum quarter plane and the real quantum plane. Zbl 1050.58006Schmüdgen, Konrad 2 2002 Uniform topologies on enveloping algebras. Zbl 0457.47038Schmüdgen, Konrad 2 1980 Two theorems about topologies on countably generated Op*-algebras. Zbl 0459.47032Schmüdgen, Konrad 2 1980 Topological realizations of Calkin algebras on Fréchet domains of unbounded operator algebras. Zbl 0632.47036Schmüdgen, K. 2 1986 On commuting unbounded self-adjoint operators. III. Zbl 0649.47022Schmüdgen, Konrad 2 1986 A polar decomposition for holomorphic functions on a strip. Zbl 1020.30025Schmüdgen, Konrad 2 2001 Mathematical work of Franciszek Hugon Szafraniec and its impacts. Zbl 1444.01024Curto, Raúl E.; Gazeau, Jean-Pierre; Horzela, Andrzej; Moslehian, Mohammad Sal; Putinar, Mihai; Schmüdgen, Konrad; de Snoo, Henk; Stochel, Jan 2 2020 The multidimensional truncated moment problem: the moment cone. Zbl 07486002di Dio, Philipp J.; Schmüdgen, Konrad 2 2022 An introduction to the theory of quantum matrix groups. (Eine Einführung in die Theorie der Quantenmatrixgruppen.) Zbl 0735.17011Schmüdgen, Konrad 1 1991 Commutator representations of covariant differential calculi on quantum groups. Zbl 0996.58004Schmüdgen, Konrad 1 2002 Transition probabilities of positive functionals on \(*\)-algebras. Zbl 1399.46099Schmüdgen, Konrad 1 2015 On a class of representations of Heisenberg commutation relation PQ-QP=- iI. Zbl 0528.47018Schmuedgen, Konrad 1 1983 On coquasitriangular bialgebras. Zbl 0946.16027Schmüdgen, Konrad 1 1999 Bicovariant differential calculi on \(\text{SL}_q(N)\) and \(\text{Sp}_q(N)\). Zbl 0947.58005Heckenberger, I.; Schmüdgen, K. 1 1997 On \(q\)-normal operators and the quantum complex plane. Zbl 1318.14003Cimprič, Jaka; Savchuk, Yurii; Schmüdgen, Konrad 1 2014 On the construction of covariant differential calculi on quantum homogeneous spaces. Zbl 0947.17008Schmüdgen, Konrad 1 1999 Perturbations of selfadjoint operators with point spectra by restrictions and selfadjoint extensions. Zbl 0443.47024Schmüdgen, Konrad 1 1981 A note on commuting unbounded self-adjoint operators affiliated to properly infinite von Neumann algebras. II. Zbl 0649.47021Schmüdgen, Konrad 1 1986 A general fibre theorem for moment problems and some applications. Zbl 1404.44012Schmüdgen, Konrad 1 2017 Around Hilbert’s 17th problem. Zbl 1268.14052Schmüdgen, Konrad 1 2012 The multidimensional truncated moment problem: the moment cone. Zbl 07486002di Dio, Philipp J.; Schmüdgen, Konrad 2 2022 An invitation to unbounded representations of \(*\)-algebras on Hilbert space. Zbl 1458.47002Schmüdgen, Konrad 4 2020 Mathematical work of Franciszek Hugon Szafraniec and its impacts. Zbl 1444.01024Curto, Raúl E.; Gazeau, Jean-Pierre; Horzela, Andrzej; Moslehian, Mohammad Sal; Putinar, Mihai; Schmüdgen, Konrad; de Snoo, Henk; Stochel, Jan 2 2020 On a theorem of Z. Sebestyén and Zs. Tarcsay. Zbl 1438.47040Gesztesy, Fritz; Schmüdgen, Konrad 3 2019 The multidimensional truncated moment problem: atoms, determinacy, and core variety. Zbl 1451.44007di Dio, Philipp J.; Schmüdgen, Konrad 16 2018 The multidimensional truncated moment problem: Carathéodory numbers. Zbl 1404.44013di Dio, Philipp J.; Schmüdgen, Konrad 9 2018 On the infinite-dimensional moment problem. Zbl 1425.44004Schmüdgen, Konrad 2 2018 The moment problem. Zbl 1383.44004Schmüdgen, Konrad 80 2017 A general fibre theorem for moment problems and some applications. Zbl 1404.44012Schmüdgen, Konrad 1 2017 Flat extensions in \(\ast\)-algebras. Zbl 1364.46047Mourrain, Bernard; Schmüdgen, Konrad 3 2016 The multi-dimensional truncated moment problem: maximal masses. Zbl 1363.44005Schmüdgen, Konrad 4 2015 Unbounded operators on Hilbert \(C^\ast\)-modules. Zbl 1341.46033Gebhardt, René; Schmüdgen, Konrad 2 2015 Transition probabilities of positive functionals on \(*\)-algebras. Zbl 1399.46099Schmüdgen, Konrad 1 2015 On \(q\)-normal operators and the quantum complex plane. Zbl 1318.14003Cimprič, Jaka; Savchuk, Yurii; Schmüdgen, Konrad 1 2014 Unbounded induced representations of \(\ast \)-algebras. Zbl 1410.16037Savchuk, Yurii; Schmüdgen, Konrad 9 2013 Unbounded self-adjoint operators on Hilbert space. Zbl 1257.47001Schmüdgen, Konrad 328 2012 Spectral theory of Schrödinger operators with infinitely many point interactions and radial positive definite functions. Zbl 1256.35030Malamud, Mark M.; Schmüdgen, Konrad 14 2012 Positivstellensätze for algebras of matrices. Zbl 1250.15034Savchuk, Yurii; Schmüdgen, Konrad 4 2012 Around Hilbert’s 17th problem. Zbl 1268.14052Schmüdgen, Konrad 1 2012 Algebras of fractions and strict Positivstellensätze for \(*\)-algebras. Zbl 1209.47034Schmüdgen, Konrad 4 2010 A noncommutative version of the Fejér-Riesz theorem. Zbl 1189.47022Savchuk, Yuriĭ; Schmüdgen, Konrad 2 2010 Noncommutative real algebraic geometry – some basic concepts and first ideas. Zbl 1158.13313Schmüdgen, Konrad 32 2009 Multivariate determinateness. Zbl 1166.44004Putinar, Mihai; Schmüdgen, Konrad 13 2008 Representations of crossed product algebras of Podleś quantum spheres. Zbl 1152.46058Schmüdgen, Konrad; Wagner, Elmar 6 2007 A strict Positivstellensatz for enveloping algebras. Zbl 1131.14061Schmüdgen, Konrad 9 2006 Hilbert space representations of cross product algebras. II. Zbl 1160.46331Schmüdgen, Konrad; Wagner, Elmar 2 2006 A strict Positivstellensatz for the Weyl algebra. Zbl 1137.47030Schmüdgen, Konrad 18 2005 Dirac operator and a twisted cyclic cocycle on the standard Podleś quantum sphere. Zbl 1067.46070Schmüdgen, Konrad; Wagner, Elmar 20 2004 On the moment problem of closed semi-algebraic sets. Zbl 1047.47012Schmüdgen, Konrad 31 2003 Hilbert space representations of cross product algebras. Zbl 1029.46110Schmüdgen, Konrad; Wagner, Elmar 6 2003 Some selfadjoint \(2\times 2\) operator matrices associated with closed operators. Zbl 1032.47014Ôta, Schôichi; Schmüdgen, K. 4 2003 Examples of twisted cyclic cocycles from covariant differential calculi. Zbl 1059.58007Schmüdgen, Konrad; Wagner, Elmar 4 2003 On well-behaved unbounded representations of \(*\)-algebras. Zbl 1019.47050Schmüdgen, Konrad 7 2002 The quantum quarter plane and the real quantum plane. Zbl 1050.58006Schmüdgen, Konrad 2 2002 Commutator representations of covariant differential calculi on quantum groups. Zbl 0996.58004Schmüdgen, Konrad 1 2002 A polar decomposition for holomorphic functions on a strip. Zbl 1020.30025Schmüdgen, Konrad 2 2001 Commutator representations of differential calculi on the quantum group \(SU_q(2)\). Zbl 1016.17014Schmüdgen, Konrad 11 1999 Operator representations of a \(q\)-deformed Heisenberg algebra. Zbl 0978.81047Schmüdgen, Konrad 2 1999 On coquasitriangular bialgebras. Zbl 0946.16027Schmüdgen, Konrad 1 1999 On the construction of covariant differential calculi on quantum homogeneous spaces. Zbl 0947.17008Schmüdgen, Konrad 1 1999 Classification of bicovariant differential calculi on the quantum groups SL\(_q(n+1)\) and Sp\(_q(2n)\). Zbl 0933.17007Heckenberger, I.; Schmüdgen, K. 10 1998 Quantum groups and their representations. Zbl 0891.17010Klimyk, Anatoli; Schmüdgen, Konrad 328 1997 Levi-Civita connections on the quantum groups \(SL_ q(N), O_ q(N)\) and \(Sp_ q(N)\). Zbl 0888.17007Heckenberger, István; Schmüdgen, Konrad 8 1997 Left-covariant differential calculi on \(SL_ q(N)\). Zbl 0882.58005Schmüdgen, Konrad; Schüler, Axel 2 1997 Bicovariant differential calculi on \(\text{SL}_q(N)\) and \(\text{Sp}_q(N)\). Zbl 0947.58005Heckenberger, I.; Schmüdgen, K. 1 1997 Operator representations of \(\mathcal{U}_ q(sl_ 2(\mathbb{R}))\). Zbl 0862.17012Schmüdgen, Konrad 7 1996 Left-covariant differential calculi on \(\mathrm{SL}_q(2)\) and \(\mathrm{SL}_q(3)\). Zbl 0879.17004Schmüdgen, Konrad; Schüler, Axel 5 1996 Classification of bicovariant differential calculi on quantum groups of type \(A, B, C\) and \(D\). Zbl 0835.17012Schmüdgen, Konrad; Schüler, Axel 7 1995 Classification of bicovariant differential calculi on quantum groups. Zbl 0846.17017Schmüdgen, Konrad; Schüler, Axel 7 1995 An operator-theoretic approach to a cocycle problem in the complex plane. Zbl 0867.47020Schmüdgen, Konrad 2 1995 Integrable operator representations of \(\mathbb{R}_ q^ 2\), \(X_{q,\gamma}\) and \(SL_ q(2,\mathbb{R})\). Zbl 0822.46064Schmüdgen, Konrad 15 1994 Classification of three-dimensional covariant differential calculi on Podles’ quantum spheres and on related spaces. Zbl 0811.17019Apel, Joachim; Schmüdgen, Konrad 11 1994 Operator representations of the real twisted canonical commutation relations. Zbl 0805.47039Schmüdgen, Konrad 3 1994 Covariant differential calculi on quantum spaces and on quantum groups. Zbl 0795.17019Schmüdgen, Konrad; Schüler, Axel 5 1993 Operator representations of \(\mathbb{R}_ q^ 2\). Zbl 0804.47049Schmüdgen, Konrad 4 1992 Commutative and non-commutative moment problems. Zbl 0821.47013Schmüdgen, K. 2 1992 The \(K\)-moment problem for compact semi-algebraic sets. Zbl 0744.44008Schmüdgen, Konrad 187 1991 On determinacy notions for the two dimensional moment problem. Zbl 0762.44004Schmüdgen, Konrad 6 1991 Non-commutative covariant differential calculi on quantum spaces and quantum groups. Zbl 0760.17013Schmüdgen, Konrad 5 1991 Non-commutative moment problems. Zbl 0712.22010Schmüdgen, Konrad 4 1991 An introduction to the theory of quantum matrix groups. (Eine Einführung in die Theorie der Quantenmatrixgruppen.) Zbl 0735.17011Schmüdgen, Konrad 1 1991 Unbounded operator algebras and representation theory. Lizenzausg. d. Akademie Verl., Berlin. Zbl 0697.47048Schmüdgen, Konrad 57 1989 On some classes of unbounded operators. Zbl 0683.47031Ôta, Schôichi; Schmüdgen, Konrad 13 1989 n-positivity of unbounded *-representations. Zbl 0701.47025Friedrich, Jürgen; Schmüdgen, Konrad 8 1989 Spaces of continuous sesquilinear forms associated with unbounded operator algebras. Zbl 0675.47047Schmüdgen, K. 3 1988 Strongly commuting selfadjoint operators and commutants of unbounded operator algebras. Zbl 0652.47027Schmüdgen, Konrad 3 1988 On a generalization of the classical moment problem. Zbl 0642.44005Schmüdgen, Konrad 4 1987 Unbounded commutants and intertwining spaces of unbounded symmetric operators and *-representations. Zbl 0624.47016Schmüdgen, Konrad 2 1987 On commuting unbounded self-adjoint operators. IV. Zbl 0649.47023Schmüdgen, Konrad 4 1986 Topological realizations of Calkin algebras on Fréchet domains of unbounded operator algebras. Zbl 0632.47036Schmüdgen, K. 2 1986 On commuting unbounded self-adjoint operators. III. Zbl 0649.47022Schmüdgen, Konrad 2 1986 A note on commuting unbounded self-adjoint operators affiliated to properly infinite von Neumann algebras. II. Zbl 0649.47021Schmüdgen, Konrad 1 1986 A formally normal operator having no normal extension. Zbl 0613.47002Schmüdgen, Konrad 13 1985 On commuting unbounded self-adjoint operators. I. Zbl 0576.47014Schmüdgen, Konrad 7 1984 Graded and filtrated topological \({}^*\)-algebras. II: The closure of the positive cone. Zbl 0545.46031Schmüdgen, Konrad 4 1984 On commuting unbounded self-adjoint operators. II. Zbl 0576.47015Schmüdgen, Konrad; Friedrich, J. 3 1984 On restrictions of unbounded symmetric operators. Zbl 0545.47015Schmüdgen, Konrad 2 1984 On the Heisenberg commutation relation. I. Zbl 0507.47010Schmuedgen, Konrad 20 1983 On the Heisenberg commutation relation. II. Zbl 0557.47023Schmüdgen, Konrad 20 1983 On domains of powers of closed symmetric operators. Zbl 0507.47009Schmuedgen, Konrad 7 1983 On a class of representations of Heisenberg commutation relation PQ-QP=- iI. Zbl 0528.47018Schmuedgen, Konrad 1 1983 Perturbations of selfadjoint operators with point spectra by restrictions and selfadjoint extensions. Zbl 0443.47024Schmüdgen, Konrad 1 1981 On topologization of unbounded operator algebras. Zbl 0475.47030Schmuedgen, Konrad 7 1980 Graded and filtrated topological *-algebras. I: Graded normal topologies. Zbl 0553.46046Schmüdgen, Konrad 4 1980 Uniform topologies on enveloping algebras. Zbl 0457.47038Schmüdgen, Konrad 2 1980 Two theorems about topologies on countably generated Op*-algebras. Zbl 0459.47032Schmüdgen, Konrad 2 1980 An example of a positive polynomial which is not a sum of squares of polynomials. A positive, but not strongly positive functional. Zbl 0424.46041Schmüdgen, Konrad 26 1979 A proof of a theorem on trace representation of strongly positive linear functionals on Op*-algebras. Zbl 0443.47044Schmüdgen, Konrad 3 1979 On trace representation of linear functionals on unbounded operator algebras. Zbl 0398.47027Schmüdgen, Konrad 18 1978 Positive cones in enveloping algebras. Zbl 0424.46040Schmüdgen, Konrad 11 1978 Lokal multiplikativ konvexe \(Op^*\)-Algebren. Zbl 0392.46032Schmüdgen, Konrad 3 1978 Lokal multiplikativ konvexe \(Op^*\)-Algebren. Zbl 0319.46035Schmüdgen, Konrad 2 1978 Uniform topologies and strong operator topologies of polynomial algebras and on the algebra of CCR. Zbl 0355.46053Schmüdgen, Konrad 3 1976 Über \(LMC^*\)-Algebren. Zbl 0315.46042Schmüdgen, Konrad 15 1975 The order structure of topological \(^*\)-algebras of unbounded operators. I. Zbl 0318.46067Schmüdgen, Konrad 12 1975 all cited Publications top 5 cited Publications all top 5 Cited by 1,333 Authors 40 Schmüdgen, Konrad 25 Inoue, Atsushi 22 Trapani, Camillo 21 Stochel, Jan 17 Landi, Giovanni 17 Lasserre, Jean-Bernard 16 Cimprič, Jaka 14 Matassa, Marco 14 Nie, Jiawang 14 Putinar, Mihai 13 Michelangeli, Alessandro 13 Netzer, Tim 12 Kuhlmann, Salma 11 Antoine, Jean-Pierre 11 Lotoreichik, Vladimir 11 Marshall, Murray Angus 10 Arai, Asao 10 Mortad, Mohammed Hichem 9 Fragoulopoulou, Maria 9 Krähmer, Ulrich 9 Ramesh, Golla 9 Scheiderer, Claus 9 Szafraniec, Franciszek Hugon 9 Zalar, Aljaž 8 Behrndt, Jussi 8 Fakhri, Hossein 8 Helton, John William 8 Jabłoński, Zenon Jan 8 Jung, Il Bong 8 Klep, Igor 8 Malamud, Mark M. 7 Bichon, Julien 7 Chirvăsitu, Alexandru 7 Corso, Rosario 7 Curto, Raúl Enrique 7 di Dio, Philipp J. 7 Fialkow, Lawrence A. 7 Heckenberger, István 7 Hu, Naihong 7 Kimsey, David Patrick 7 Shi, Yuming 7 Wagner, Elmar 7 Waldmann, Stefan 7 Zampini, Alessandro 6 Bagarello, Fabio 6 Çelik, Salih 6 De Commer, Kenny 6 Infusino, Maria 6 Jørgensen, Palle E. T. 6 Kolb, Stefan 6 Kürsten, Klaus-Detlef 6 Laurent, Monique 6 Maack Bisgaard, Torben 6 McCullough, Scott A. 6 Moretti, Valter 6 Pham Viet Hai 6 Schweighofer, Markus 6 Seelmann, Albrecht 5 Arlins’kyĭ, Yuriĭ Moĭseĭovych 5 Bhatt, Subhash J. 5 Bhowmick, Jyotishman 5 Colombo, Fabrizio 5 Gallone, Matteo 5 Hadfield, Tom 5 Kaad, Jens 5 Kyed, David 5 Lê Công Trình 5 Matsuzawa, Yasumichi 5 Mugnolo, Delio 5 Neidhardt, Hagen 5 Neshveyev, Sergey V. 5 Saurabh, Bipul 5 Savchuk, Yuri 5 Sayyah-Fard, M. 5 Schötz, Matthias 5 Sukochev, Fedor Anatol’evich 5 Yafaev, Dimitri R. 5 Yoo, Seonguk 4 Albeverio, Sergio A. 4 Bellomonte, Giorgia 4 Budzyński, Piotr 4 Caruso, Noe Angelo 4 Cichoń, Dariusz 4 Dabrowski, Ludwik 4 D’Andrea, Francesco 4 de Klerk, Etienne 4 Emsiz, Erdal 4 Fioresi, Rita 4 Gesztesy, Fritz 4 Goswami, Debashish 4 Grubišić, Luka 4 Hartwig, Jonas T. 4 Hofmann, Gerald 4 Jordan, David Andrew 4 Klimyk, Anatoliy Ul’yanovich 4 Liu, Yan 4 Lledó, Fernando 4 Magron, Victor 4 Pagani, Chiara 4 Pankrashkin, Konstantin ...and 1,233 more Authors all top 5 Cited in 287 Serials 59 Journal of Mathematical Analysis and Applications 58 Journal of Mathematical Physics 49 Journal of Functional Analysis 47 Communications in Mathematical Physics 47 Journal of Algebra 29 Letters in Mathematical Physics 27 Proceedings of the American Mathematical Society 26 Journal of Geometry and Physics 26 Transactions of the American Mathematical Society 25 Journal of Pure and Applied Algebra 23 Integral Equations and Operator Theory 21 Advances in Mathematics 18 Reviews in Mathematical Physics 18 Publications of the Research Institute for Mathematical Sciences, Kyoto University 18 Mathematical Programming. Series A. Series B 18 Complex Analysis and Operator Theory 16 Linear Algebra and its Applications 15 Algebras and Representation Theory 14 Reports on Mathematical Physics 14 Annales Henri Poincaré 13 Communications in Algebra 13 SIAM Journal on Optimization 11 Nuclear Physics. B 11 Journal of Differential Equations 11 Positivity 11 SIGMA. Symmetry, Integrability and Geometry: Methods and Applications 10 Journal of High Energy Physics 9 Mathematische Annalen 9 Journal of Global Optimization 9 Journal of Noncommutative Geometry 8 Israel Journal of Mathematics 8 Theoretical and Mathematical Physics 8 Mathematische Zeitschrift 8 Journal of Mathematical Sciences (New York) 7 Archiv der Mathematik 7 Advances in Applied Clifford Algebras 7 Operators and Matrices 6 Manuscripta Mathematica 6 Journal of Theoretical Probability 6 International Journal of Mathematics 6 The Journal of Geometric Analysis 6 Annales de l’Institut Henri Poincaré. Physique Théorique 6 Analysis and Mathematical Physics 5 Linear and Multilinear Algebra 5 Annales de l’Institut Fourier 5 Mathematische Nachrichten 5 Journal of Complexity 5 Proceedings of the Indian Academy of Sciences. Mathematical Sciences 5 Expositiones Mathematicae 5 Potential Analysis 5 Opuscula Mathematica 5 Comptes Rendus. Mathématique. Académie des Sciences, Paris 5 Science China. Mathematics 4 Physics Letters. A 4 Rocky Mountain Journal of Mathematics 4 Ukrainian Mathematical Journal 4 Annali di Matematica Pura ed Applicata. Serie Quarta 4 Dissertationes Mathematicae 4 Journal of Approximation Theory 4 Journal für die Reine und Angewandte Mathematik 4 Rendiconti del Circolo Matemàtico di Palermo. Serie II 4 Siberian Mathematical Journal 4 Indagationes Mathematicae. New Series 4 Bulletin des Sciences Mathématiques 4 Infinite Dimensional Analysis, Quantum Probability and Related Topics 4 Communications on Pure and Applied Analysis 4 Journal of Algebra and its Applications 4 International Journal of Geometric Methods in Modern Physics 4 Mediterranean Journal of Mathematics 4 Banach Journal of Mathematical Analysis 4 Journal of Pseudo-Differential Operators and Applications 4 Annals of Functional Analysis 4 Advances in Operator Theory 3 Modern Physics Letters A 3 International Journal of Theoretical Physics 3 Journal of Statistical Physics 3 Mathematical Proceedings of the Cambridge Philosophical Society 3 Periodica Mathematica Hungarica 3 Studia Mathematica 3 Bulletin of the London Mathematical Society 3 Czechoslovak Mathematical Journal 3 Functional Analysis and its Applications 3 Journal of the London Mathematical Society. Second Series 3 Journal of Optimization Theory and Applications 3 Monatshefte für Mathematik 3 Results in Mathematics 3 Statistics & Probability Letters 3 Operations Research Letters 3 Probability Theory and Related Fields 3 European Journal of Operational Research 3 Annales de la Faculté des Sciences de Toulouse. Mathématiques. Série VI 3 Computational Optimization and Applications 3 Selecta Mathematica. New Series 3 The Journal of Fourier Analysis and Applications 3 Documenta Mathematica 3 Mathematical Physics, Analysis and Geometry 3 Advances in Geometry 3 Journal of Evolution Equations 3 Algebraic & Geometric Topology 3 Optimization Letters ...and 187 more Serials all top 5 Cited in 60 Fields 432 Operator theory (47-XX) 341 Quantum theory (81-XX) 271 Functional analysis (46-XX) 209 Nonassociative rings and algebras (17-XX) 170 Associative rings and algebras (16-XX) 141 Algebraic geometry (14-XX) 118 Global analysis, analysis on manifolds (58-XX) 115 Partial differential equations (35-XX) 100 Integral transforms, operational calculus (44-XX) 95 Operations research, mathematical programming (90-XX) 73 Group theory and generalizations (20-XX) 64 Commutative algebra (13-XX) 51 Probability theory and stochastic processes (60-XX) 49 Linear and multilinear algebra; matrix theory (15-XX) 45 Numerical analysis (65-XX) 44 Number theory (11-XX) 40 Special functions (33-XX) 40 Harmonic analysis on Euclidean spaces (42-XX) 37 Combinatorics (05-XX) 35 Statistical mechanics, structure of matter (82-XX) 34 Functions of a complex variable (30-XX) 33 Topological groups, Lie groups (22-XX) 31 Differential geometry (53-XX) 24 Category theory; homological algebra (18-XX) 24 Ordinary differential equations (34-XX) 23 Field theory and polynomials (12-XX) 20 Real functions (26-XX) 20 Dynamical systems and ergodic theory (37-XX) 19 Abstract harmonic analysis (43-XX) 18 Several complex variables and analytic spaces (32-XX) 16 Manifolds and cell complexes (57-XX) 14 \(K\)-theory (19-XX) 14 Measure and integration (28-XX) 14 Difference and functional equations (39-XX) 14 Relativity and gravitational theory (83-XX) 11 Approximations and expansions (41-XX) 11 Calculus of variations and optimal control; optimization (49-XX) 10 Convex and discrete geometry (52-XX) 10 Systems theory; control (93-XX) 9 Computer science (68-XX) 8 Mathematical logic and foundations (03-XX) 8 Algebraic topology (55-XX) 8 Statistics (62-XX) 7 Order, lattices, ordered algebraic structures (06-XX) 5 Fluid mechanics (76-XX) 4 Mechanics of particles and systems (70-XX) 4 Mechanics of deformable solids (74-XX) 4 Optics, electromagnetic theory (78-XX) 4 Biology and other natural sciences (92-XX) 3 General and overarching topics; collections (00-XX) 3 Geometry (51-XX) 3 Information and communication theory, circuits (94-XX) 2 History and biography (01-XX) 2 General algebraic systems (08-XX) 2 Potential theory (31-XX) 2 General topology (54-XX) 2 Game theory, economics, finance, and other social and behavioral sciences (91-XX) 1 Sequences, series, summability (40-XX) 1 Integral equations (45-XX) 1 Classical thermodynamics, heat transfer (80-XX) Citations by Year Wikidata Timeline The data are displayed as stored in Wikidata under a Creative Commons CC0 License. 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