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Publikationsliste für
Harald Woracek
als Autorin / Autor bzw. wesentlich beteiligte Person

204 Datensätze (1995 - 2021)

Die Publikationen der TU Wien sind erst ab dem Jahr 2002 vollzählig in der Publikationsdatenbank enthalten. Publikationen aus den Jahren vor 2002 können, müssen aber nicht in der Datenbank vorhanden sein.


Bücher und Buch-Herausgaben


M. Langer, A. Luger, H. Woracek:
"Operator Theory and Indefinite Inner Product Spaces";
Birkhäuser, Basel-Boston-Berlin, 2006, ISBN: 3-7643-7515-9; 380 S.


Zeitschriftenartikel


A. Baranov, H. Woracek:
"De Branges' theorem on approximation problems of Bernstein type";
Journal of the Institute of Mathematics of Jussieu, 12 (2013), 4; S. 879 - 899.

A. Baranov, H. Woracek:
"Finite-dimensional de Branges subspaces generated by majorants";
Operator Theory: Advances and Applications, 188 (2008), S. 37 - 48.

A. Baranov, H. Woracek:
"Majorization in de Brange spaces I.";
Journal of Functional Analysis, 258 (2010), S. 2601 - 2636.

A. Baranov, H. Woracek:
"Majorization in de Branges spaces II. Banach spaces generated by majorants";
Collectanea Mathematica, 1 (2011), 62.

A. Baranov, H. Woracek:
"Stability of order and type under perturbation of the spectral measure";
Revista Matematica Iberoamericana, 35 (2019), 4.

A. Baranov, H. Woracek:
"Subspaces of de Branges spaces generated by majorants";
Canadian Journal of Mathematics, 61 (2009), S. 503 - 517.

A. Baranov, H. Woracek:
"Subspaces of de Branges spaces with prescribed growth";
Akgebra i Analiz, 18 (2006), 5; S. 23 - 45.

H. de Snoo, H. Woracek:
"Compressed resolvents, Q-functions and h0-resolvents in almost Pontryagin spaces";
Operator Theory: Advances and Applications, 263 (2018), S. 425 - 484.

H. de Snoo, H. Woracek:
"Restriction and Factorization for Isometric and Symmetric Operators in Almost Pontryagin Spaces";
Operator Theory:Advances and Applications, 252 (2016), S. 123 - 170.

H. de Snoo, H. Woracek:
"Sums, couplings, and completions of almost Pontryagin spaces";
Linear Algebra and its Applications, 437 (2012), 2; S. 559 - 580.

H. de Snoo, H. Woracek:
"The Krein formula in almost Pontryagin spaces. A proof via orthogonal coupling";
Indagationes Mathematicae - New Series, 29 (2018), S. 714 - 729.

G. Dorfer, H. Woracek:
"Formal power series and some theorems of J.F.Ritt in arbitrary characteristic";
Monatshefte für Mathematik, 127 (1999), S. 277 - 293.

G. Eigenthaler, H. Woracek:
"A remark on permutable polynomials";
Contributions to General Algebra, 10 (1998), S. 139 - 142.

S Hassi, H. de Snoo, H. Woracek:
"Some interpolation problems of Nevanlinna-Pick type. I. The Krein-Langer method";
Operator Theory: Advances and Applications, 106 (1998), S. 201 - 216.

M. Kaltenbäck, H. Winkler, H. Woracek:
"Almost Pontryagin Spaces";
Operator Theory: Advances and Applications, 160 (2005), S. 253 - 271.

M. Kaltenbäck, H. Winkler, H. Woracek:
"De Branges Spaces of Entire Functions Symmetric About the Origin";
Integral Equations and Operator Theory, 56 (2006), S. 483 - 509.

M. Kaltenbäck, H. Winkler, H. Woracek:
"Generalized Nevanlinna functions with essentially positive spectrum";
J. Operator Theory, 55 (2006), 1; S. 17 - 48.

M. Kaltenbäck, H. Winkler, H. Woracek:
"Singularities of Generalized Strings";
Operator Theory: Advances and Applications, 163 (2005), S. 191 - 248.

M. Kaltenbäck, H. Winkler, H. Woracek:
"Strings, dual strings, and related canonical systems";
Mathematische Nachrichten, 280 (2007), 13-14; S. 1518 - 1536.

M. Kaltenbäck, H. Woracek:
"Canonical Differential Equations of Hilbert-Schmidt Type";
Operator Theory: Advances and Applications, 175 (2007), S. 159 - 168.

M. Kaltenbäck, H. Woracek:
"De Branges spaces of exponential type: general theory of growth.";
Acta Sci.Math. (Szeged), 71 (2005), 1-2; S. 231 - 284.

M. Kaltenbäck, H. Woracek:
"Generalized resolvent matrices and spaces of analytic functions";
Integral Equations and Operator Theory, 32 (1998), S. 282 - 318.

M. Kaltenbäck, H. Woracek:
"Hermite-Biehler functions with zeros close to the imaginary axis";
Proc. of the AMS, 133 (2004), 1; S. 245 - 255.

M. Kaltenbäck, H. Woracek:
"On extensions of hermitian functions with a finite number of negative squares";
J. Operator Theory, 40 (1998), S. 147 - 183.

M. Kaltenbäck, H. Woracek:
"On representations of matrix valued Nevanlinna functions by u-resolvents";
Mathematische Nachrichten, 205 (1999), S. 115 - 130.

M. Kaltenbäck, H. Woracek:
"Polya class theory for hermite-Biehler functions of finite order";
Journal of the London Math. Soc., 68 (2003), S. 338 - 354.

M. Kaltenbäck, H. Woracek:
"Pontryagin spaces of entire functions I";
Integral Equations and Operator Theory, 33 (1999), S. 34 - 97.

M. Kaltenbäck, H. Woracek:
"Pontryagin spaces of entire functions II";
Integral Equations and Operator Theory, 33 (1999), S. 305 - 380.

M. Kaltenbäck, H. Woracek:
"Pontryagin spaces of entire functions III";
Acta Sci.Math. (Szeged), 69 (2003), S. 241 - 310.

M. Kaltenbäck, H. Woracek:
"Pontryagin spaces of entire functions. IV";
Acta Sci.Math. (Szeged), 72 (2006), S. 709 - 835.

M. Kaltenbäck, H. Woracek:
"Pontryagin spaces of entire functions. V";
Acta Sci.Math. (Szeged), 77 (2011), S. 223 - 336.

M. Kaltenbäck, H. Woracek:
"Pontryagin spaces of entire functions. VI";
Acta Sci.Math. (Szeged), 76 (2010), S. 511 - 560.

M. Kaltenbäck, H. Woracek:
"Schmidt-Representation of Difference Quotient Operators";
Operator Theory: Advances and Applications, 171 (2006), S. 147 - 170.

M. Kaltenbäck, H. Woracek:
"Selfadjoint extensions of symmetric operators in degenerated inner product spaces";
Integral Equations and Operator Theory, 28 (1997), S. 289 - 320.

M. Kaltenbäck, H. Woracek:
"The Krein formula for generalized resolvents in degenerated inner product spaces";
Monatshefte für Mathematik, 127 (1999), S. 119 - 140.

M. Kaltenbäck, H. Woracek:
"Unique prime factorization in a partial semigroup of matrix-polynomials";
Discussiones Mathematicae General Algebra and Applications, 26 (2006), S. 21 - 43.

M. Kaltenbäck, H. Woracek, H. Winkler:
"Symmetric Relations of Finite Negativity";
Operator Theory: Advances and Applications, 162 (2005), S. 191 - 210.

H. Langer, H. Woracek:
"Resolvents of symmetric operators. The degenerated Nevanlinna-Pick problem";
Operator Theory: Advances and Applications, 103 (1998), S. 233 - 261.

M. Langer, H. Woracek:
"A Characterization of Intermediate Weyl Coefficients";
Monatshefte für Mathematik, 135 (2002), S. 137 - 155.

M. Langer, H. Woracek:
"A function space model for canonical systems with an inner singularity";
Acta Sci.Math. (Szeged), 77 (2011), S. 101 - 165.

M. Langer, H. Woracek:
"A local inverse spectral theorem for Hamiltonian systems";
Inverse Problems, 27 (2011), 055002.

M. Langer, H. Woracek:
"Dependence of the Weyl coefficient on singular interface conditions";
Proceedings of the Edinburgh Mathematical Society, 52 (2009), S. 445 - 487.

M. Langer, H. Woracek:
"Distributional representations of Nk(∞)-functions";
Mathematische Nachrichten, 288 (2015), 10; S. 1127 - 1149.

M. Langer, H. Woracek:
"Indefinite Hamiltonian systems whose Titchmarsh--Weyl coefficients have no finite generalized poles of non-negative type";
Operators and Matrices, 7 (2013), 3; S. 477 - 555.

M. Langer, H. Woracek:
"Stability of N-extremal measures";
Methods of Functional Analysis and Topology, 21 (2015), 1; S. 69 - 75.

M. Langer, H. Woracek:
"Stability of the derivative of a canonical product";
Complex Analysis and Operator Theory, 8 (2014), 6; S. 1183 - 1224.

M. Langer, H. Woracek:
"The exponential type of the fundamental solution of an indefinite Hamiltonian system";
Complex Analysis and Operator Theory, 1 (2011), 28 S.

M. Langer, H. Woracek:
"The exponential type of the fundamental solution of an indefinite Hamiltonian system";
Complex Analysis and Operator Theory, 7 (2013), S. 285 - 312.

V Pivovarchik, H. Woracek:
"Eigeenvalue asymptotics for a star-graph damped vibrations problem";
Asymptotic Analysis, 73 (2011), 169-185.

V Pivovarchik, H. Woracek:
"Shifted Hermite-Biehler Functions and Their Applications";
Integral Equations and Operator Theory, 57 (2007), S. 101 - 126.

V Pivovarchik, H. Woracek:
"Sums of Nevanlinna functions and differential equations on star-shaped graphs";
Operators and Matrices, 3 (2009), 4; S. 451 - 501.

V Pivovarchik, H. Woracek:
"The square-transform of Hermite-Biehler functions. A geometric approach";
Methods Funct.Anal.Topology, 13 (2007), 2; S. 187 - 200.

R. Pruckner, R. Romanov, H. Woracek:
"Bounds on Order of Indeterminate Moment Sequences";
Constructive Approximation, 46 (2017), S. 199 - 225.

R. Pruckner, H. Woracek:
"Estimates for order of Nevanlinna matrices and a Berezanskii-type theorem";
Proceedings of the Edinburgh Mathematical Society, 149 (2019), 6.

R. Pruckner, H. Woracek:
"Limit behaviour of Nevanlinna functions";
Algebra i Analiz, 33 (2021), 5; S. 153 - 175.

R. Romanov, H. Woracek:
"Canonical systems with discrete spectrum";
Journal of Functional Analysis, 278 (2020), 4.

S. Simonov, H. Woracek:
"Spectral Multiplicity of Selfadjoint Schrödinger Operators on Star-Graphs with Standard Interface Conditions";
Integral Equations and Operator Theory, 78 (2014), S. 523 - 575.

S. Sokolova, E. de Vink, H. Woracek:
"A companion to coalgebraic weak bisumulation for action-type systems";
Computer Science report, TU Eindhoven, 2007 (2007).

S. Sokolova, E. de Vink, H. Woracek:
"Coalgebraic weak bisimulation for action type systems";
Scientific Annals of Computer Science, 19 (2009), S. 93 - 144.

S. Sokolova, H. Woracek:
"Congruences of Convex Algebras";
Journal of Pure and Applied Algebra, 219 (2015), S. 3110 - 3148.

S. Sokolova, H. Woracek:
"Termination in Convex Sets of Distributions";
Logical Methods in Computer Science, 14 (2018), S. 1 - 28.

H. Winkler, H. Woracek:
"A growth condition for Hamiltonian systems related with Krein strings";
Acta Sci.Math. (Szeged), 80 (2014), S. 31 - 94.

H. Winkler, H. Woracek:
"On semibounded canonical systems";
Linear Algebra and its Applications, 429 (2008), S. 1082 - 1092.

H. Winkler, H. Woracek:
"Reparameterizations of non-trace normed Hamiltonians";
Operator Theory: Advances and Applications, 221 (2012), S. 667 - 690.

H. Winkler, H. Woracek:
"Symmetry in de Branges almost Pontryagin spaces";
Integral Equations and Operator Theory, 76 (2013), S. 179 - 212.

H. Woracek:
"A remark on affine complete rings";
Studia Scientiarum Mathematicarum Hungarica, 32 (1996), S. 103 - 106.

H. Woracek:
"An operator theoretic approach to degenerated Nevanlinna-Pick interpolation";
Mathematische Nachrichten, 176 (1995), S. 335 - 350.

H. Woracek:
"Asymptotics of eigenvalues for a class of singular Krein strings";
Collectanea Mathematica, 66 (2015), S. 469 - 479.

H. Woracek:
"De Branges spaces of entire functions closed under forming differerence quotients";
Integral Equations and Operator Theory, 37 (2000), 2; S. 238 - 249.

H. Woracek:
"Entries of indefinite Nevanlinna matrices";
St. Petersburg Mathematic Journal, 26 (2015), 5; S. 757 - 783.

H. Woracek:
"Existence of zerofree functions N-associated to a de Branges Pontryagain space";
Monatshefte für Mathematik, 162 (2011), S. 453 - 506.

H. Woracek:
"Inductive topologies in universal algebras";
Contributions to General Algebra, 9 (1995), S. 325 - 331.

H. Woracek:
"Majorization in de~Branges spaces III. Division by Blaschke products.";
Algebra und Analysis, 21 (2009), 6; S. 3 - 46.

H. Woracek:
"Multiple point interpolation in Nevanlinna classes";
Integral Equations and Operator Theory, 28 (1997), S. 97 - 109.

H. Woracek:
"Nevanlinna-Pick interpolation: the degenerated case";
Linear Algebra and its Applications, 252 (1997), S. 141 - 158.

H. Woracek:
"On the existence of congruence-uniform structures on universal algebras";
Algebra Universalis, 36 (1996), S. 141 - 158.

H. Woracek:
"Perturbation of chains of de Branges spaces";
Journal d´Analyse Mathématique, 135 (2018), S. 271 - 312.

H. Woracek:
"Reproducing kernel almost Pontryagin spaces";
Linear Algebra and its Applications, 461 (2014), S. 271 - 317.

H. Woracek:
"Resolvent matrices in degenerated inner product spaces";
Mathematische Nachrichten, 213 (2000), S. 155 - 175.

H. Woracek, G. Eigenthaler:
"Permutable polynomials and related topics";
Contributions to General Algebra, 9 (1995), S. 163 - 182.

H. Woracek, S. Sokolova, E. de Vink:
"Weak Bisimulation for action type coalgebras";
Electronic Notes in Theor. Comp. Science, 122 (2005), 211-228.

H. Woracek, S. Sokolova, E. de Vink:
"Weak Bisimulation for Action-Type Coalgebras";
Computer Science report, TU Eindhoven, 04 (2004), 16; S. 1 - 43.


Buchbeiträge


A. Baranov, H. Woracek:
"Admissible majorants for de Branges spaces of entire functions";
in: "ASC Report 30/2007", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2007, ISBN: 978-3-902627-00-1.

A. Baranov, H. Woracek:
"De Branges Spaces";
in: "Operator Theory, Volume 1", A. Baranov, H. Woracek (Hrg.); Springer, 2015, ISBN: 978-3-0348-0692-3, S. 471 - 752.

A. Baranov, H. Woracek:
"De Branges' theorem on approximation problems of Bernstein type";
in: "ASC Report 29/2012", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2012, ISBN: 978-3-902627-05-6, S. 1 - 20.

A. Baranov, H. Woracek:
"Finite-dimensional de Branges subspaces generated by majorants";
in: "ASC Report 31/2007", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2007, ISBN: 978-3-902627-00-1.

A. Baranov, H. Woracek:
"Majorization in de Brange spaces I. Representation of subspaces";
in: "ASC Report 12/2009", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2009, ISBN: 978-3-902627-02-5.

A. Baranov, H. Woracek:
"Majorization in de Brange spaces II. Banach spaces generated by majorants";
in: "ASC Report 13/2009", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2009, ISBN: 978-3-902627-02-5.

A. Baranov, H. Woracek:
"Majorization in de Branges spaces III. division by Blaschke products";
in: "ASC Report 38/2009", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2009, ISBN: 978-3-902627-02-5.

A. Baranov, H. Woracek:
"Stability of order and type under perturbation of the spectral measure";
in: "ASC Report 27/2016", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2016, ISBN: 978-3-902627-09-4, S. 1 - 71.

H. de Snoo, H. Woracek:
"Compressed resolvents, Q-functions and h0-resolvents in almost Pontryagin spaces";
in: "ASC Report 24/2016", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2016, ISBN: 978-3-902627-09-4, S. 1 - 59.

H. de Snoo, H. Woracek:
"Restriction and factorization for isometric and symmetric operators in almost Pontryagin spaces";
in: "ASC Report 05/2015", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2015, ISBN: 978-3-902627-08-7, S. 1 - 43.

H. de Snoo, H. Woracek:
"Sums, couplings, and completions of almost Pontryagin spaces";
in: "ASC Report 03/2011", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2011, ISBN: 978-3-902627-04-9.

H. de Snoo, H. Woracek:
"The Krein formula in almost Pontryagin spaces. A proof via orthogonal coupling.";
in: "ASC Report 15/2017", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2017, ISBN: 978-3-902627-10-0, S. 1 - 16.

M. Kaltenbäck, H. Woracek:
"Canonical differential equations of Hilbert-Schmidt type";
in: "ASC Report 28/2007", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2007, ISBN: 978-3-902627-00-1.

M. Kaltenbäck, H. Woracek:
"Pontryagin spaces of entire functions V";
in: "ASC Report 21/2009", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2009, ISBN: 978-3-902627-02-5.

M. Kaltenbäck, H. Woracek:
"Pontryagin spaces of entire functions VI";
in: "ASC Report 22/2009", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2009, ISBN: 978-3-902627-02-5.

M. Langer, H. Woracek:
"A function space model for canonical systems with an inner singularity";
in: "ASC Report30/2009", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien2, 2009, ISBN: 978-3-902627-02-5.

M. Langer, H. Woracek:
"A local inverse spectral theorem for Hamiltonian systems";
in: "ASC Report 43/2009", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2009, ISBN: 978-3-902627-02-5.

M. Langer, H. Woracek:
"Dependence of the Weyl coefficient on singular interface conditions";
in: "ASC Report 03/2008", herausgegeben von: Institut für Analysis und Scientific Computing; Vienna University of Technology, Wien, 2008, ISBN: 978-3-902627-01-8.

M. Langer, H. Woracek:
"Direct and inverse spectral theorems for a class of canonical systems with two singular endpoints";
in: "ASC Report 18/2015", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2015, ISBN: 978-3-902627-08-7, S. 1 - 85.

M. Langer, H. Woracek:
"Distributional representations of ${\mathcal N}_{\kappa}^{(infty)}$-functions";
in: "ASC Report 17/2013", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2013, ISBN: 978-3-902627-06-3, S. 1 - 28.

M. Langer, H. Woracek:
"Indefinite Hamiltonian systems whose Titchmarsh-Weyl coefficients have no finite generalized poles of non-negative type";
in: "ASC Report 04/2012", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2012, ISBN: 978-3-902627-05-6, S. 1 - 73.

M. Langer, H. Woracek:
"Indefinite inner product spaces";
in: "Operator Theory, Volume 1", 1; M. Langer, H. Woracek (Hrg.); Springer, 2015, ISBN: 978-3-0348-0692-3, S. 149 - 469.

M. Langer, H. Woracek:
"Stability of N-extremal measures";
in: "ASC Report 05/2013", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2013, ISBN: 978-3-902627-06-3, S. 1 - 8.

M. Langer, H. Woracek:
"Stability of the derivative of a canonical product";
in: "ASC Report 38/2012", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2012, ISBN: 978-3-902627-05-6, S. 1 - 38.

M. Langer, H. Woracek:
"The exponential type of the fundamental solution of an indefinite Hamiltonian system";
in: "ASC Report 30/2010", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2010, ISBN: 978-3-902627-03-2.

V Pivovarchik, H. Woracek:
"Eigenvalue Asymptotics for a Star-Graph Damped Vibrations Problem";
in: "ASC Report 20/2010", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2010, ISBN: 978-3-902627-03-2.

V Pivovarchik, H. Woracek:
"Shifted Hermite-Biehler functions and their applications";
in: "ASC Report 29/2007", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2007, ISBN: 978-3-902627-00-1.

V Pivovarchik, H. Woracek:
"Sums of Nevanlinna functions and differential equations on star-shaped graphs";
in: "ASC Report 17/2008", herausgegeben von: Instiute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2008, ISBN: 978-3-902627-01-8.

V Pivovarchik, H. Woracek:
"The square-transform of Hermite-Biehler functions. A geometric approach";
in: "ASC Report 33/2007", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2007, ISBN: 978-3-902627-00-1.

R. Pruckner, R. Romanov, H. Woracek:
"Bounds on order of indeterminate moment sequences";
in: "ASC Report 38/2015", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2015, ISBN: 978-3-902627-08-7, S. 1 - 26.

R. Pruckner, H. Woracek:
"Estimates for order of Nevanlinna matrices and a Berezanskii-type theorem";
in: "ASC Report 21/2016", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2016, ISBN: 978-3-902627-09-4, S. 1 - 27.

R. Pruckner, H. Woracek:
"Limit behaviour of Nevanlinna functions";
in: "ASC Report 16/2019", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2019, ISBN: 978-3-902627-12-4, S. 1 - 29.

R. Romanov, H. Woracek:
"Canonical systems with discrete spectrum";
in: "ASC Report 04/2019", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2019, ISBN: 978-3-902627-12-4, S. 1 - 33.

S. Simonov, H. Woracek:
"Spectral multiplicity of selfadjoint Schrödinger operators on star-graphs with standard interface conditions";
in: "ASC Report 40/2012", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2012, ISBN: 978-3-902627-05-6, S. 1 - 52.

S. Sokolova, H. Woracek:
"Congruences of Convex Algebras";
in: "ASC Report 39/2012", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2012, ISBN: 978-3-902627-05-6, S. 1 - 43.

S. Sokolova, H. Woracek:
"Proper semirings and proper convex functors";
in: "ASC Report 22/2017", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2017, ISBN: 978-3-902627-10-0, S. 1 - 32.

S. Sokolova, H. Woracek:
"Proper semirings and proper convex functors";
in: "Foundations of Software Science and Computation Structures", C. Baier, U. Dal Lago (Hrg.); Springer International Publishing, 2018, 16 S.

S. Sokolova, H. Woracek:
"Termination in Convex Sets of Distributions";
in: "ASC Report 08/2017", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2017, ISBN: 978-3-902627-10-0, S. 1 - 25.

H. Winkler, H. Woracek:
"A growth condition for Hamiltonian systems related with Krein strings";
in: "ASC Report 12/2012", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2012, ISBN: 978-3-902627-05-6, S. 1 - 61.

H. Winkler, H. Woracek:
"On semibounded canonical systems";
in: "ASC Report 27/2007", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2007, ISBN: 978-3-902627-00-1.

H. Winkler, H. Woracek:
"Reparametrizations of non trace-normed Hamiltonians";
in: "ASC Report 08/2011", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2011, ISBN: 978-3-902627-04-9.

H. Winkler, H. Woracek:
"Symmetry in de Branges almost Pontryagin spaces";
in: "ASC Report 33/2012", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2012, ISBN: 978-3-902627-05-6, S. 1 - 33.

H. Woracek:
"An addendum to M.G.~Krein's inverse spectral theorem for strings";
in: "ASC Report 29/2010", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2010, ISBN: 978-3-902627-03-2.

H. Woracek:
"Asymptotics of eigenvalues for a class of singular Krein strings";
in: "ASC Report 13/2012", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2012, ISBN: 978-3-902627-05-6, S. 1 - 12.

H. Woracek:
"De Branges spaces and growth aspects";
in: "ASC Report 03/2014", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2014, ISBN: 978-3-902627-07-0, S. 1 - 30.

H. Woracek:
"De Branges Spaces and growths aspects";
in: "Operator Theory, Volume 1", Springer, 2015, S. 489 - 523.

H. Woracek:
"Directing functionals and de Branges space completions in almost Pontryagin spaces";
in: "ASC Report 19/2016", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2016, ISBN: 978-3-902627-09-4, S. 1 - 51.

H. Woracek:
"Directing Functionals and De Branges Space Completions in Almost Pontryagin Spaces";
in: "Advances in Complex Analysis and Operator Theory, Festschrift in Honor of Daniel Alpay 60th Birthday", Springer International Publishing, 2017, ISBN: 3319623613, S. 347 - 398.

H. Woracek:
"Entries of indefinite Nevanlinna matrices";
in: "ASC Report 10/2013", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2013, ISBN: 978-3-902627-06-3, S. 1 - 31.

H. Woracek:
"Existance of zerofree functions $N$-associated to a de Branges Pontryagin space";
in: "ASC Report 23/2009", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2009, ISBN: 978-3-902627-02-5.

H. Woracek:
"Perturbation of chains of de Branges spaces";
in: "ASC Report 42/2014", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2014, ISBN: 978-3-902627-07-0, S. 1 - 32.

H. Woracek:
"Reproducing kernel almost Pontryagin spaces";
in: "ASC Report 14/2014", herausgegeben von: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2014, ISBN: 978-3-902627-07-0, S. 1 - 40.


Beiträge in Tagungsbänden


S. Sokolova, H. Woracek:
"Nawrotzki's Algorithm for the Countable Splitting Lemma, Constructively";
in: "LIPIcs 211", 23; F. Gadducci, A. Silva (Hrg.); 9th Conference on Algebra and Coalgebra in Computer Science CALCO 2021, 2021, ISBN: 978-3-95977-212-9, S. 1 - 16.

S. Sokolova, H. Woracek:
"Termination in Convex Sets of Distributions";
in: "Proceedings of the 7th Conference on Algebra and Coalgebra in Computer Science", P. Bonchi, B. König (Hrg.); Leibnitz International Proceedings in Informatics, Leibnitz, 2017, S. 22:1 - 22:16.


Vorträge und Posterpräsentationen (ohne Tagungsband-Eintrag)


M. Kaltenbäck, H. Woracek:
"Über de Branges-Hilberträume ganzer Funktionen";
Vortrag: Seminar aus Schuranalysis, Leipzig, Leipzig (eingeladen); 20.09.2004 - 24.09.2004.

H. Woracek:
"A charcterization of intermediate Weyl coefficients";
Vortrag: Int. Conf.on Complex Analysis and Related, Topics, IX Romanian Finnish Seminar, Brasov, Rumänien (eingeladen); 27.08.2001 - 31.08.2001.

H. Woracek:
"A Generalization of de Branges´ theory to an indefinite setting and Weyl theory for differential operartors with singular coefficients";
Vortrag: Hilbert Spaces of Entire Functions and Spectral Theory of Self-Adjoint Differential Operators, Centre de Recerca Mathemàtica, Barcelona; 30.05.2011 - 04.06.2011.

H. Woracek:
"A local inverse spectral theorem for canonical systems";
Vortrag: Workshop on boundary relations, Leiden (eingeladen); 14.12.2009 - 18.12.2009.

H. Woracek:
"A local inverse spectral theorem for Hamiltonian systems";
Vortrag: Inverse spectral problems in one dimension, International Centre for Mathematical Sciences, Edinburgh; 17.10.2011 - 21.10.2011.

H. Woracek:
"Admissible majorants for de Branges spaces of entire functions";
Vortrag: 6th Workshop on Operator Theory in Krein Spaces and Applications, Berlin (eingeladen); 14.12.2006 - 17.12.2006.

H. Woracek:
"Almost Pontryagin space completions";
Vortrag: Miniworkshop spectral and perturbation theory of selfadjoint operators in Krein spaces, Graz; 30.01.2013 - 31.01.2013.

H. Woracek:
"An addendum to M.G.Krein's inverse spectral theorem for strings";
Vortrag: Workshop Systems and Operators, Groningen; 14.12.2010 - 17.12.2010.

H. Woracek:
"An addendum to M.G.Krein`s Inverse Spectral Theorem for strings";
Vortrag: 20th Summer St. Petersburg Meeting in Mathematical Analysis, St. Petersburg; 24.06.2011 - 29.06.2011.

H. Woracek:
"An Addendum to M.G.Krein´s Inverse Spectral Theorem for strings";
Vortrag: OeMG Tagung 2011, Donauuniversität Krems; 25.09.2011 - 28.09.2011.

H. Woracek:
"An indefinite analogue of the Stieltjes class";
Vortrag: 2nd Workshop Operator Theory in Krein Spaces and Applications, TU Berlin (eingeladen); 12.12.2003 - 14.12.2003.

H. Woracek:
"An indefinite generalization of a canonical system of differential equations";
Vortrag: IWOTA 2000-Portugal, Faro, Portugal (eingeladen); 12.09.2000 - 15.09.2000.

H. Woracek:
"Asymptotics of eigenvalues for a class of singular Krein strings";
Vortrag: Operator Theory, Analysis and Mathematical Physics, Centre de Recerca Mathematica, Barcelona (eingeladen); 11.06.2012 - 14.06.2012.

H. Woracek:
"Canonical systems in the indefinite setting";
Vortrag: IWOTA 2004, Newcastle upon Tyne (eingeladen); 12.07.2004 - 16.07.2004.

H. Woracek:
"Canonical systems with discrete spectrum";
Vortrag: Reproducing Kernels in Function Spaces and Their Applications am Euler International Mathematical Institute, St. Petersburg (eingeladen); 03.06.2019 - 07.06.2019.

H. Woracek:
"De Branges spaces of entire functions: General theaory of growth";
Vortrag: 17th St.Petersburg Summer Meeting in Mathematical Analysis, St. Petersburg (eingeladen); 06.07.2006 - 11.07.2006.

H. Woracek:
"De Branges spaces subject to growth conditions";
Vortrag: 19th Intern.Conf. on Operator Theory, Temesvar, Temesvar, Rumänien (eingeladen); 27.06.2002 - 02.07.2002.

H. Woracek:
"De Branges' theorem on approximation problems of Bernstein type";
Vortrag: 21th Summer St.Petersburg Meeting in Mathematical Analysis, Euler Institute, St.Petersburg; 25.06.2012 - 30.06.2012.

H. Woracek:
"DeBranges spaces of entire functions symmetric about the origin";
Vortrag: 4th workshop Oper.Th. in Krein Spaces and Appl., TU Berlin (eingeladen); 17.12.2004 - 19.12.2004.

H. Woracek:
"Direct and Inverse Spectral Problems for 2-dimensional Hamiltonian Systems";
Vortrag: Gastvortrag, Dublin Institute of Technology (eingeladen); 18.04.2013.

H. Woracek:
"Directing Functionals and De Branges Space Completions in Almost Pontryagin Spaces";
Vortrag: The Fifths Najman Conference on Spectral Theory and Differential Equations, Opatija (eingeladen); 10.09.2017 - 15.09.2017.

H. Woracek:
"Entries of indefinite Nevanlinna matrices";
Vortrag: Lorentz Center Workshop: System and operator realizations of analytic functions, Leiden; 18.02.2013 - 22.02.2013.

H. Woracek:
"Hermite-Biehler functions with zeros in an angle";
Vortrag: Workshop Operator Th -Gohberg, Amsterdam (eingeladen); 20.08.2003 - 22.08.2003.

H. Woracek:
"High-energy behaviour of Weyl coefficients";
Vortrag: Mini-course and Workshop on de Branges-Rovnyak Spaces, Fields Institute, Toronto (eingeladen); 03.10.2021 - 08.10.2021.

H. Woracek:
"Indefinite Canonical Systems, Theory and Examples";
Vortrag: IWOTA 2007, Potchefstroom, Potchefstroom, Südafrika (eingeladen); 03.07.2007 - 06.07.2007.

H. Woracek:
"Inverse spectral theorems for Hamiltonian systems. Local results";
Vortrag: University of Strathclyde, Glasgow (eingeladen); 05.11.2009.

H. Woracek:
"Limit behaviour of Nevanlinna functions";
Vortrag: 30th International Workshop on Operator Theory and Applications (IWOTA 2019), Istituto Superior Tecnico Lisbon (eingeladen); 22.07.2019 - 26.07.2019.

H. Woracek:
"Lokale Eindeutigkeitssätze für Hamiltonsche Systeme";
Vortrag: TU Berlin, Berlin (eingeladen); 03.12.2009.

H. Woracek:
"On a problem of Louis de Branges";
Vortrag: Differential Operators on Graphs and Waveguides, Graz University of Technology (eingeladen); 25.02.2019 - 01.03.2019.

H. Woracek:
"On semibounded canonical systems";
Vortrag: ILAS 2006, Amsterdam (eingeladen); 18.07.2006 - 21.07.2006.

H. Woracek:
"On singularities of matrix chains";
Vortrag: 18th Int.Conf.on Operator Theory, Timisoara, Timisoara, Rumänien (eingeladen); 26.06.2000 - 01.07.2000.

H. Woracek:
"Order and Type of canonical systems. A Survey";
Vortrag: Operator Theory, Analysis and Mathematical Physics (OTAMP 2016), St. Petersburg (eingeladen); 02.08.2016 - 07.08.2016.

H. Woracek:
"Perturbation of chains of de Branges spaces";
Vortrag: 24th St. Petersburg Summer Meeting in Mathematical Analysis, Euler International Mathematical Institute, St. Petersburg; 25.06.2015 - 30.06.2015.

H. Woracek:
"Proper Semirings and Proper Convex Functors";
Vortrag: Austrian Workshop on Logic in Computer Science, Turracher Höhe (eingeladen); 26.01.2020 - 29.01.2020.

H. Woracek:
"Reproducing kernel almost Pontryagin spaces";
Vortrag: Konferenz "Noncommutative Analysis, Operator Theory, and Applications, Mailand; 23.06.2014 - 27.06.2014.

H. Woracek:
"Riemannsche Flächen und analytische Fortsetzung";
Vortrag: Gastvortrag, TU Ilmenau (eingeladen); 05.11.2013 - 16.11.2013.

H. Woracek:
"s-numbers of difference quotient operators";
Vortrag: IWOTA 2003 Cagliari, Cagliari, Italien (eingeladen); 24.07.2003 - 27.07.2003.

H. Woracek:
"Schatten-Class Properties of Canonical Systems";
Vortrag: 27th St. Petersburg Summer Meeting in Mathematical Analysis am Euler International Mathematical Institute, St. Petersburg (eingeladen); 06.08.2018 - 10.08.2018.

H. Woracek:
"Selbstadjungierte Erweiterungen symmetrischer Operatoren";
Vortrag: Summer School 2017, Reichenau; 28.09.2018 - 30.09.2018.

H. Woracek:
"Shifted Hermite-Biehler functions";
Vortrag: 5th Workshop Oper.Th.in Krein spaces and appl., Berlin (eingeladen); 17.12.2005 - 19.12.2005.

H. Woracek:
"Spectral theory for Hamiltonian systems with two singular endpoints";
Vortrag: Seminar Angewandte Analysis und Numerische Mathematik, Technische Universität Graz; 15.12.2011.

H. Woracek:
"Spectral theory of a class of canonical systems with two singular endpoints";
Vortrag: Konferenz "Komplexe Analysis und/et Theorie Spectrale (KATS), Linz; 12.05.2014 - 13.05.2014.

H. Woracek:
"Spectral theory of a class of canonical systems with two singular endpoints";
Vortrag: Seminar Univ. Wien, Wien; 30.10.2014.

H. Woracek:
"Stability of order and type of a measure";
Vortrag: Hilbert Spaces of entire functions and their applications, Polish Mathematical Conference Center, Bedlewo (eingeladen); 22.05.2017 - 26.05.2017.

H. Woracek:
"Stability of the derivative of a canonical product";
Vortrag: 23rd St. Petersburg Summer Meeting in Mathematical Analysis, St. Petersburg; 25.06.2014 - 30.06.2014.

H. Woracek:
"Subspaces of DeBranges spaces with prescribed growth";
Vortrag: Modern Analysis and Applications, Odessa (eingeladen); 09.04.2007 - 14.04.2007.

H. Woracek:
"Sums of Nevanlinna functions and differential equations on star shaped";
Vortrag: 17th St.Petersburg Summer Meeting in Mathematical Analysis, St. Petersburg, Russland (eingeladen); 23.06.2008 - 28.06.2008.

H. Woracek:
"The order problem for Hamburger Hamiltonians";
Vortrag: Analysis Day Stockholm University, Stockholm; 28.09.2015.

H. Woracek:
"Two-dimensional Hamiltonian systems with two singular endpoints";
Vortrag: IWOTA 2010 Berlin, Berlin; 12.07.2010 - 16.07.2010.


Dissertationen (eigene und begutachtete)


M Kleinert:
"Models for cyclic definitisable selfadjoint operators in Krein spaces";
Betreuer/in(nen), Begutachter/in(nen): H. Woracek, A. Luger; Institut für Analysis und Scientific Computing, 2010; Rigorosum: 11/2010.

R. Pruckner:
"Growth Estimates for Nevanlinna Matrices";
Betreuer/in(nen), Begutachter/in(nen): H. Woracek, M. Langer; Institut für Analysis und Scientific Computing, 2018; Rigorosum: 11.01.2018.


Diplom- und Master-Arbeiten (eigene und betreute)


F. Barjon:
"Abstract scattering theory and wave operators";
Betreuer/in(nen): H. Woracek; 101, 2009; Abschlussprüfung: 2009.

A. Buchinger:
"Finding Hamiltonian Satisfying Initial Values Arising from the Riemann Zeta-Function";
Betreuer/in(nen): H. Woracek; Analysis und Scientific Computing, 2021; Abschlussprüfung: 2021.

J. Eckhardt:
"Direkte und inversive Spektraltheorie von Sturm-Liouville Differentialoperatoren";
Betreuer/in(nen): H. Woracek; Institute of Analysis and Scientific Computing, 2009.

C. Gammer:
"Distributionen als Randwerte harmonischer und analytischer Funktionen";
Betreuer/in(nen): H. Woracek; Institut für Analysis und Scientific Computing, 2007; Abschlussprüfung: 2007.

U. Haböck:
"Reproducing kernel spaces of entire functions";
Betreuer/in(nen): H. Woracek; Institut für Analysis und Scientific Computing, 2001; Abschlussprüfung: 2001.

T. Hawel:
"Analytische Fortsetzung";
Betreuer/in(nen): H. Woracek; Institut für Analysis und Scientific Computing, 2005; Abschlussprüfung: 2005.

A. Hula:
"Der Spektralsatz der nicht-archimedischen Funktionalanalysis";
Betreuer/in(nen): H. Woracek; Institut für Analysis und Scientific Computing, 2005; Abschlussprüfung: 2005.

J. Kaiser:
"Canonical Systems";
Betreuer/in(nen): H. Woracek; 101, 2018; Abschlussprüfung: 18.03.2018.

M. Kleindessner:
"The Liouville Transformation in Sturm-Liouville Theory";
Betreuer/in(nen): H. Woracek; Institut für Analysis und Scientific Computing, 2012; Abschlussprüfung: 10/2012.

H.P. Mayr:
"Darstellungstheorie und Spinoren in der speziellen Relativitätstheorie";
Betreuer/in(nen): H. Woracek; Institut für Analysis und Scientific Computing, 2004.

A. Obermeier, L. Schimmer:
"Green´s functions of Schrödinger operators with operator - valued potentials";
Betreuer/in(nen): H. Woracek, R. Hammerling; Institut for Analysis and Scientific Computing, 2011.

M. Pichler:
"Boundary behaviour of singular integrals";
Betreuer/in(nen): H. Woracek; Analysis und Scientific Computing, 2013; Abschlussprüfung: 03.06.2013.

A. Pinter:
"Sturm-Liouville-Operatoren mit maßwertigen Koeffizienten und die Spektralasymptotik des µ-v-Lapalace-Operators";
Betreuer/in(nen): H. Woracek; Analysis und Scientific Computing, 2013; Abschlussprüfung: 21.10.2013.

J. Reiffenstein:
"Matrix-Valued Hermite-Biehler Functions and Generalized Interlacing Property";
Betreuer/in(nen): H. Woracek; Analysis und Scientific Computing, 2020.

P. Repp:
"Ideals of Compact Operators";
Betreuer/in(nen): H. Woracek; Analysis und Scientific Computing, 2020.


Nichttextl. wiss. Veröffentlichungen (gem. Wissensbilanz-VO)


S. Simonov, H. Woracek:
"Spectral multiplicity of selfadjoint Schroedinger operators on star-graphs with standard interface conditions";
Art der Veröffentlichung: digital, Projekt: Integral Equations Operator Theory; 2013.