TY - GEN A1 - Reich, Sebastian T1 - Algebrodifferentialgleichungen und Vektorfelder auf Mannigfaltigkeiten N2 - In diesem Beitrag wird der Zusammenhang zwischen Algebrodifferentialgleichungen (ADGL) und Vektorfeldern auf Mannigfaltigkeiten untersucht. Dazu wird zunächst der Begriff der regulären ADGL eingeführt, wobei unter eirter regulären ADGL eine ADGL verstanden wird, deren Lösungsmenge identisch mit der Lösungsmenge eines Vektorfeldes ist. Ausgehend von bekannten Aussagen über die Lösungsmenge eines Vektorfeldes werden analoge Aussagen für die Lösungsmenge einer regulären ADGL abgeleitet. Es wird eine Reduktionsmethode angegeben, die auf ein Kriterium für die Begularität einer ADGL und auf die Definition des Index einer nichtlinearen ADGL führt. Außerdem wird gezeigt, daß beliebige Vektorfelder durch reguläre ADGL so realisiert werden können, daß die Lösungsmenge des Vektorfeldes mit der der realisierenden ADGL identisch ist. Abschließend werden die für autonome ADGL gewonnenen Aussagen auf den Fall der nichtautonomen ADGL übertragen. T3 - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - paper 160 Y1 - 1980 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-47290 ER - TY - GEN A1 - Reich, Sebastian T1 - On a geometrical interpretation of differential-algebraic equations N2 - The subject of this paper is the relation of differential-algebraic equations (DAEs) to vector fields on manifolds. For that reason, we introduce the notion of a regular DAE as a DAE to which a vector field uniquely corresponds. Furthermore, a technique is described which yields a family of manifolds for a given DAE. This socalled family of constraint manifolds allows in turn the formulation of sufficient conditions for the regularity of a DAE. and the definition of the index of a regular DAE. We also state a method for the reduction of higher-index DAEs to lowsr-index ones that can be solved without introducing additional constants of integration. Finally, the notion of realizability of a given vector field by a regular DAE is introduced, and it is shown that any vector field can be realized by a regular DAE. Throughout this paper the problem of path-tracing is discussed as an illustration of the mathematical phenomena. T3 - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - paper 157 Y1 - 1990 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-46683 ER - TY - JOUR A1 - Denecke, Klaus-Dieter T1 - Congruences on maximal partial clones and strong regular varieties generated by preprimal partial algebras II Y1 - 1991 ER - TY - JOUR A1 - Denecke, Klaus-Dieter T1 - Strong regular varieties of partial algebras I Y1 - 1991 ER - TY - JOUR A1 - Denecke, Klaus-Dieter T1 - Minimal algebras and category equivalences Y1 - 1991 ER - TY - GEN A1 - Reich, Sebastian T1 - On an existence and uniqueness theory for nonlinear differential-algebraic equations N2 - An existence and uniqueness theory is developed for general nonlinear and nonautonomous differential-algebraic equations (DAEs) by exploiting their underlying differential-geometric structure. A DAE is called regular if there is a unique nonautonomous vector field such that the solutions of the DAE and the solutions of the vector field are in one-to-one correspondence. Sufficient conditions for regularity of a DAE are derived in terms of constrained manifolds. Based on this differential-geometric characterization, existence and uniqueness results are stated for regular DAEs. Furthermore, our not ons are compared with techniques frequently used in the literature such as index and solvability. The results are illustrated in detail by means of a simple circuit example. T3 - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - paper 158 Y1 - 1991 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-46706 ER - TY - GEN A1 - Quaisser, Erhard T1 - Erdös, P., Geombinatorics, 1 (1991), 3, S. 4 BT - Geombinatorics Y1 - 1991 ER - TY - GEN A1 - Reich, Sebastian T1 - Differential-algebraic equations and applications in circuit theory N2 - Technical and physical systems, especially electronic circuits, are frequently modeled as a system of differential and nonlinear implicit equations. In the literature such systems of equations are called differentialalgebraic equations (DAEs). It turns out that the numerical and analytical properties of a DAE depend on an integer called the index of the problem. For example, the well-known BDF method of Gear can be applied, in general, to a DAE only if the index does not exceed one. In this paper we give a geometric interpretation of higherindex DAEs and indicate problems arising in connection with such DAEs by means of several examples. N2 - Die mathematische Modellierung technisch physikalischer Systeme wie elektrische Netzwerke, führt häufig auf ein System von Differentialgleichungen und nichtlinearen impliziten Gleichungen sogenannten Algebrodifferentialgleichungen (ADGL). Es zeigt sich, daß die numerischen und analytischen Eigenschaften von ADGL durch den Index des Problems charakterisiert werden können. Insbesondere können die bekannten Integrationsformeln von Gear im allgemeinen nur auf ADGL mit dem Index eins angewendet werden. In diesem Beitrag wird eine geometrische Interpretation von ADGL mit einem höheren Index gegeben sowie auf Probleme im Zusammenhang mit derartigen ADGL an Hand verschiedener Beispiele hingewiesen. T3 - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - paper 156 Y1 - 1992 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-46646 ER - TY - THES A1 - Lüders, Otfried T1 - Äquivalenzen und Dualitäten von Varietäten und Quasivarietäten die von endlichen Algebren erzeugt werden Y1 - 1992 ER - TY - GEN A1 - Quaisser, Erhard T1 - Woodall, D., Geombinatorics, 1 (1992), 4, S. 18 - 20 BT - Geombinatorics Y1 - 1992 ER - TY - GEN A1 - Quaisser, Erhard T1 - Zeitler, H., Mathematische Semesterberichte, 39 (1992), S. 163 - 183 BT - Mathematische Semesterberichte Y1 - 1992 ER - TY - BOOK A1 - Schmidt, Hans-Jürgen A1 - Wang, Anzhong T1 - Plane domain walls when coupled with the Brans-Dicke scalar field T3 - Preprint / Universität Potsdam, Fachbereich Mathematik Y1 - 1992 VL - 1992, 06 PB - Univ. CY - Potsdam ER - TY - BOOK A1 - Kasper, Uwe T1 - On the phenomenological description of particle and entropy creation T3 - Preprint / Universität Potsdam, Fachbereich Mathematik Y1 - 1992 VL - 1992, 07 PB - Univ. CY - Potsdam ER - TY - BOOK A1 - Waltz, Christine T1 - Interpolation von holomorphen Typen T3 - Preprint / Universität Potsdam, Fachbereich Mathematik Y1 - 1992 VL - 1992, 01 PB - Univ. CY - Potsdam ER - TY - JOUR A1 - Braunß, Hans-Andreas T1 - On holomorphic mappings of Schatten class type Y1 - 1992 ER - TY - BOOK A1 - Böckmann, Christine T1 - A modification of the Trust-Region Gauss-Newton method to solve separable nonlinear least squares problems T3 - Preprint / Universität Potsdam, Fachbereich Mathematik Y1 - 1992 VL - 1992, 17 PB - Univ. CY - Potsdam ER - TY - BOOK A1 - Böckmann, Christine T1 - Curve fitting and identification of physical spectra T3 - Preprint / Universität Potsdam, Fachbereich Mathematik Y1 - 1992 VL - 1992, 18 PB - Univ. CY - Potsdam ER - TY - BOOK A1 - Schmidt, Hans-Jürgen T1 - On inflation within closed Fiedmann universe models T3 - Preprint / Universität Potsdam, Fachbereich Mathematik Y1 - 1992 VL - 1992, 02 PB - Univ. CY - Potsdam ER - TY - BOOK A1 - Schmidt, Hans-Jürgen T1 - Scale-invariant gravity in two dimensions II T3 - Preprint / Universität Potsdam, Fachbereich Mathematik Y1 - 1992 VL - 1992, 03 PB - Univ. CY - Potsdam ER - TY - JOUR A1 - Amendola, Luca A1 - Battaglia Mayer, Alexandra A1 - Capozziello, Salvatore A1 - Gottlöber, Stefan A1 - Müller, Volker A1 - Occhionero, Franco A1 - Schmidt, Hans-Jürgen T1 - Generalized sixth-order gravity and inflation JF - Preprint / Universität Potsdam, Fachbereich Mathematik Y1 - 1992 VL - 1992, 04 PB - Univ. CY - Potsdam ER - TY - BOOK A1 - Rainer, Martin T1 - Projective geometry for relativistic quantum physics T3 - Preprint / Universität Potsdam, Fachbereich Mathematik Y1 - 1992 VL - 1992, 05 PB - Univ. CY - Potsdam ER - TY - JOUR A1 - Gottlöber, Stefan A1 - Schmidt, Hans-Jürgen A1 - Starobinsky, A. A. A1 - Müller, Volker T1 - Models of chaotic inflation JF - Preprint / Universität Potsdam, Fachbereich Mathematik Y1 - 1992 VL - 1992, 08 PB - Univ. CY - Potsdam ER - TY - BOOK A1 - Schmidt, Hans-Jürgen T1 - On the de Sitter space-time : the geometric foundation of infaltionary cosmology T3 - Preprint / Universität Potsdam, Fachbereich Mathematik Y1 - 1992 VL - 1992, 10 PB - Univ. CY - Potsdam ER - TY - BOOK A1 - Reuter, Stefan A1 - Schmidt, Hans-Jürgen T1 - On the Wheeler-de Witt equation for homogeneous cosmological models T3 - Preprint / Universität Potsdam, Fachbereich Mathematik Y1 - 1992 VL - 1992, 11 PB - Univ. CY - Potsdam ER - TY - BOOK A1 - Kasper, Uwe T1 - Particle and entropy creation in cosmology T3 - Preprint / Universität Potsdam, Fachbereich Mathematik Y1 - 1992 VL - 1992, 13 PB - Univ. CY - Potsdam ER - TY - BOOK A1 - Junek, Heinz T1 - Factorization of operator ideals and boundes sets in tensor products of locally convex spaces T3 - Preprint / Universität Potsdam, Fachbereich Mathematik Y1 - 1992 VL - 1992, 16 PB - Univ. CY - Potsdam ER - TY - BOOK ED - Denecke, Klaus-Dieter T1 - General algebra and applications T3 - Research and exposition in mathematics Y1 - 1993 SN - 3-88538-220-2 VL - 20 PB - Heldermann CY - Berlin ER - TY - THES A1 - Brademann, Sylke T1 - Approximationsideale homogener Polynome und holomorpher Funktionen Y1 - 1993 ER - TY - THES A1 - Koppitz, Jörg T1 - Über Halbgruppen mit vereinigungshalbdistributivem Unterhalbgruppenverband Y1 - 1993 ER - TY - BOOK A1 - Battaglia Mayer, Alexandra A1 - Schmidt, Hans-Jürgen T1 - The de Sitter space-time as attractor solution in eighth order gravity T3 - Preprint / Universität Potsdam, Fachbereich Mathematik Y1 - 1993 VL - 1993, 05 PB - Univ. CY - Potsdam ER - TY - JOUR A1 - Jonas, Peter A1 - Langer, Heinz T1 - Selfadjoint extensions of a closed linear relation of defect one in a Krein space Y1 - 1993 ER - TY - JOUR A1 - Louis, Alfred K. A1 - Maaß, Peter T1 - Contour reconstructions for 3D X-Ray CT-Images Y1 - 1993 ER - TY - GEN A1 - Quaisser, Erhard T1 - Bonetti, F., Civolani, N., Centro Stampa Univ. degli Studi di Perugia, (1993), S. 113 - 131 BT - Centro Stampa Univ. degli Studi di Perugia Y1 - 1993 ER - TY - GEN A1 - Quaisser, Erhard T1 - Steinke, G. F., Geometriae Dedicata, 48 (1993), S. 337 - 348 BT - Geometriae Dedicata Y1 - 1993 ER - TY - GEN A1 - Quaisser, Erhard T1 - Strambach, K., Centro Stampa Univ. degli Studi di Perugia, (1993), S. 21 - 24 BT - Centro Stampa Univ. degli Studi di Perugia Y1 - 1993 ER - TY - GEN A1 - Quaisser, Erhard T1 - Kainen, P. C., Geombinatorics, 3 (1993), 1, S. 10 - 12 BT - Geombinatorics Y1 - 1993 ER - TY - BOOK A1 - Schmidt, Hans-Jürgen T1 - Comment to a paper by J. Simon in Phys. Rev. D 45 (1992) 1953 T3 - Preprint / Universität Potsdam, Fachbereich Mathematik Y1 - 1993 VL - 1993, 06 PB - Univ. CY - Potsdam ER - TY - BOOK A1 - Rainer, Martin T1 - Orientation duality of 4-dimensional real Lie algebras T3 - Preprint / Universität Potsdam, Fachbereich Mathematik Y1 - 1993 VL - 1993, 08 PB - Univ. CY - Potsdam ER - TY - BOOK A1 - Baumgärtel, Hellmut T1 - Some operatoralgebraic fundamentals of the algebraic quantum field theory T3 - Preprint / Universität Potsdam, Fachbereich Mathematik Y1 - 1993 VL - 1993, 09 PB - Univ. CY - Potsdam ER - TY - BOOK A1 - Baumgärtel, Hellmut T1 - Operatoralgebren und Quantenfeldtheorie T3 - Preprint / Universität Potsdam, Fachbereich Mathematik Y1 - 1993 VL - 1993, 12 PB - Univ. CY - Potsdam ER - TY - JOUR A1 - Baumgärtel, Hellmut T1 - Laudatio Hans Kaiser Y1 - 1993 ER - TY - JOUR A1 - Junek, Heinz T1 - Factorization of operator ideals and the BB-property Y1 - 1993 ER - TY - JOUR A1 - Denecke, Klaus-Dieter T1 - On the characterization of primal partial algebras by strong regular hyperidentities Y1 - 1994 ER - TY - JOUR A1 - Denecke, Klaus-Dieter A1 - Halkowska, Katarzcyna T1 - P-compatible hybrid-identities and hyperidentities Y1 - 1994 ER - TY - JOUR A1 - Denecke, Klaus-Dieter A1 - Malcev, I. A. T1 - Separation of clones by means of hyperidentities Y1 - 1994 ER - TY - JOUR A1 - Denecke, Klaus-Dieter A1 - Wismath, Shelly T1 - Solid varieties of semigroups Y1 - 1994 ER - TY - JOUR A1 - Denecke, Klaus-Dieter A1 - Koppitz, Jörg T1 - Hyperassociative semigroups Y1 - 1994 ER - TY - JOUR A1 - Denecke, Klaus-Dieter T1 - Pre-solid varieties Y1 - 1994 ER - TY - BOOK A1 - Denecke, Klaus-Dieter A1 - Todorov, Kalco T1 - Algebraische Grundlagen der Arithmetik T3 - Berliner Studienreihe zur Mathematik Y1 - 1994 VL - 4 PB - Heldermann CY - Berlin ER - TY - GEN A1 - Ascher, Uri M. A1 - Chin, Hongsheng A1 - Reich, Sebastian T1 - Stabilization of DAEs and invariant manifolds N2 - Many methods have been proposed for the stabilization of higher index differential-algebraic equations (DAEs). Such methods often involve constraint differentiation and problem stabilization, thus obtaining a stabilized index reduction. A popular method is Baumgarte stabilization, but the choice of parameters to make it robust is unclear in practice. Here we explain why the Baumgarte method may run into trouble. We then show how to improve it. We further develop a unifying theory for stabilization methods which includes many of the various techniques proposed in the literature. Our approach is to (i) consider stabilization of ODEs with invariants, (ii) discretize the stabilizing term in a simple way, generally different from the ODE discretization, and (iii) use orthogonal projections whenever possible. The best methods thus obtained are related to methods of coordinate projection. We discuss them and make concrete algorithmic suggestions. T3 - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - paper 030 Y1 - 1994 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-15625 ER - TY - GEN A1 - Leimkuhler, Benedict A1 - Reich, Sebastian T1 - Symplectic integration of constrained Hamiltonian systems N2 - A Hamiltonian system in potential form (formula in the original abstract) subject to smooth constraints on q can be viewed as a Hamiltonian system on a manifold, but numerical computations must be performed in Rn. In this paper methods which reduce "Hamiltonian differential algebraic equations" to ODEs in Euclidean space are examined. The authors study the construction of canonical parameterizations or local charts as well as methods based on the construction of ODE systems in the space in which the constraint manifold is embedded which preserve the constraint manifold as an invariant manifold. In each case, a Hamiltonian system of ordinary differential equations is produced. The stability of the constraint invariants and the behavior of the original Hamiltonian along solutions are investigated both numerically and analytically. T3 - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - paper 032 KW - differential-algebraic equations KW - constrained Hamiltonian systems KW - canonical discretization schemes KW - symplectic methods Y1 - 1994 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-15653 ER - TY - GEN A1 - Ascher, Uri M. A1 - Chin, Hongsheng A1 - Petzold, Linda R. A1 - Reich, Sebastian T1 - Stabilization of constrained mechanical systems with DAEs and invariant manifolds N2 - Many methods have been proposed for the simulation of constrained mechanical systems. The most obvious of these have mild instabilities and drift problems. Consequently, stabilization techniques have been proposed A popular stabilization method is Baumgarte's technique, but the choice of parameters to make it robust has been unclear in practice. Some of the simulation methods that have been proposed and used in computations are reviewed here, from a stability point of view. This involves concepts of differential-algebraic equation (DAE) and ordinary differential equation (ODE) invariants. An explanation of the difficulties that may be encountered using Baumgarte's method is given, and a discussion of why a further quest for better parameter values for this method will always remain frustrating is presented. It is then shown how Baumgarte's method can be improved. An efficient stabilization technique is proposed, which may employ explicit ODE solvers in case of nonstiff or highly oscillatory problems and which relates to coordinate projection methods. Examples of a two-link planar robotic arm and a squeezing mechanism illustrate the effectiveness of this new stabilization method. T3 - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - paper 033 Y1 - 1994 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-15698 ER - TY - GEN A1 - Reich, Sebastian T1 - Momentum conserving symplectic integrators N2 - In this paper, we show that symplectic partitioned Runge-Kutta methods conserve momentum maps corresponding to linear symmetry groups acting on the phase space of Hamiltonian differential equations by extended point transformation. We also generalize this result to constrained systems and show how this conservation property relates to the symplectic integration of Lie-Poisson systems on certain submanifolds of the general matrix group GL(n). T3 - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - paper 044 Y1 - 1994 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-16824 ER - TY - BOOK A1 - Schmidt, Hans-Jürgen T1 - Why do all the curvature invariants of a gravitational wave vanish? T3 - Preprint / Universität Potsdam, Institut für Mathematik Y1 - 1994 VL - 1994, 03 PB - Univ. CY - Potsdam ER - TY - BOOK A1 - Jonas, Peter A1 - Langer, Heinz T1 - Selfadjoint extensions of a closed linear realtion of defect one in a Krein space. Universität Potsdam, Fachbereich Mathematik T3 - Preprint / Universität Potsdam, Institut für Mathematik Y1 - 1994 VL - 1994, 17 PB - Univ. CY - Potsdam ER - TY - BOOK A1 - Dahlke, Stephan A1 - Maaß, Peter T1 - The affine uncertainty principle in one and two dimensions T3 - Preprint / Universität Potsdam, Fachbereich Mathematik Y1 - 1994 VL - 1994, 01 PB - Univ. CY - Potsdam ER - TY - BOOK A1 - Wollenberg, Manfred T1 - On an inverse problem in modular theory T3 - Preprint / Universität Potsdam, Institut für Mathematik Y1 - 1994 VL - 1994, 07 PB - Univ. CY - Potsdam ER - TY - BOOK A1 - Dahlke, Stephan A1 - Maaß, Peter T1 - A continuous wavelet transform on tangent bundles of spheres T3 - Preprint / Universität Potsdam, Institut für Mathematik Y1 - 1994 VL - 1994, 16 PB - Univ. CY - Potsdam ER - TY - BOOK A1 - Quaisser, Erhard T1 - Die Symmetriestruktur von Figuren T3 - Preprint / Universität Potsdam, Institut für Mathematik Y1 - 1994 VL - 1994, 08 CY - Potsdam ER - TY - BOOK A1 - Kasper, Uwe T1 - On first class sonstraints of simple cosmological models in Einstein's gravity theory T3 - Preprint / Universität Potsdam, Institut für Mathematik Y1 - 1994 VL - 1994, 10 PB - Univ. CY - Potsdam ER - TY - BOOK A1 - Schmidt, Hans-Jürgen T1 - Stability and Hamiltonian formulation of higher derivative theories T3 - Preprint / Universität Potsdam, Institut für Mathematik Y1 - 1994 VL - 1994, 04 PB - Univ. CY - Potsdam ER - TY - BOOK A1 - Reuter, Stefan A1 - Schmidt, Hans-Jürgen T1 - Klassisch konformäquivalente Gravitationstheorien und deren korrespondierende Wheeler-de-Witt-Gleichungen T3 - Preprint / Universität Potsdam, Institut für Mathematik Y1 - 1994 VL - 1994, 05 PB - Univ. CY - Potsdam ER - TY - BOOK A1 - Rainer, Martin T1 - Conformal minisuperspace quantization and equivalence of multidimensional classical and quantum models : lecuture presented at the International Conference on Multidimensional Cosmology, Jaroslavl, June 20-26, 1994 T3 - Preprint / Universität Potsdam, Institut für Mathematik Y1 - 1994 VL - 1994, 09 PB - Univ. CY - Potsdam ER - TY - JOUR A1 - Alpers, Karsten T1 - Über zweidimensionale diskrete Bewegungsgruppen der pseudoeuklidischen Ebene Y1 - 1994 ER - TY - BOOK A1 - Baumgärtel, Hellmut T1 - A modified approach to the Doplicher-Roberts theorem on the construction of field algebra and the symmetry group in superselection theory T3 - Preprint / SFB 288, Differentialgeometrie und Quantenphysik Y1 - 1994 VL - 134 CY - Berlin ER - TY - BOOK A1 - Bölling, Reinhard T1 - Das Fotoalbum für Weierstraß = A photoalbum for Weierstrass Y1 - 1994 PB - Vieweg CY - Braunschweig [u.a.] ER - TY - JOUR A1 - Bölling, Reinhard T1 - Karl Weierstraß - Stationen eines Lebens Y1 - 1994 ER - TY - BOOK A1 - Kasper, Uwe T1 - On the Hamilton formalism for cosmological models in fourth order gravity theories T3 - Preprint / Universität Potsdam, Institut für Mathematik Y1 - 1994 VL - 1994, 11 CY - Potsdam ER - TY - BOOK A1 - Neidhardt, Hagen A1 - Zagrebnov, Valentin A. ED - Demuth, Michael ED - Exner, Pavel T1 - Mathematical results in quantum mechanics : international conference in Blossin (Germany), May 17 - 21, 1993 T3 - Operator Theory Y1 - 1994 VL - 70 PB - Birkhäuser CY - Basel ER - TY - JOUR A1 - Gähler, Siegfried A1 - Gähler, Werner T1 - Fuzzy real numbers Y1 - 1994 ER - TY - JOUR A1 - Gähler, Werner T1 - Die Theorie der Kontinua : ein Gebiet, in dem die Anschauung teilweise versagt Y1 - 1994 ER - TY - JOUR A1 - Schmidt, Hans-Jürgen A1 - Baier, Frank W. A1 - Bleyer, Ulrich A1 - Hubrig, Swetlana A1 - Meister, Claudia-Veronika A1 - Schilbach, Elena A1 - Tiersch, Heinz T1 - Zum Wissenschaftler-Integrationsprogramm Y1 - 1994 ER - TY - JOUR A1 - Louis, Alfred K. A1 - Maaß, Peter A1 - Rieder, Andreas A1 - Stark, H.-G. T1 - Wavelets and digital image processing Y1 - 1994 ER - TY - JOUR A1 - Jaksic, V. A1 - Jung, K. A1 - Klein, Markus A1 - Seiler, R. T1 - Corrections to quantized charge transport in quantum hall systems Y1 - 1994 ER - TY - BOOK A1 - Baumgärtel, Hellmut A1 - Jurke, Matthias A1 - Lledó, Fernando T1 - A remark on covariant and causal nets of CAR-resp.CCR-type local algebras assigned to the irreducible unitary representation of the poincare group labeled by (m>0, s, +) T3 - Preprint / SFB 288, Differentialgeometrie und Quantenphysik Y1 - 1994 VL - 120 CY - Berlin ER - TY - JOUR A1 - Jahnke, Thomas A1 - Wippermann, Christina T1 - Vernünftig bremsen und rechnen! : zehn Aufgaben für Bahn-, Auto- und Radfahrer Y1 - 1994 ER - TY - JOUR A1 - Jahnke, Thomas A1 - Wippermann, Christina T1 - Weg, Geschwindigkeit und Beschleunigung im Mathematikunterricht Y1 - 1994 ER - TY - JOUR A1 - Klein, Markus T1 - Hall conductance of Riemann surfaces Y1 - 1994 ER - TY - JOUR A1 - Klotzek, Benno T1 - Diskontinuierliche Bewegungsgruppen verschiedenen Grades in metrischen Räumen Y1 - 1994 ER - TY - GEN A1 - Klotzek, Benno T1 - Falkner, N., A characterization of inner product spaces Y1 - 1994 ER - TY - GEN A1 - Klotzek, Benno T1 - Stammler, L., Einige Themen im Zusammenhang mit rasterbezogenem Approximieren Y1 - 1994 ER - TY - GEN A1 - Klotzek, Benno T1 - Stärk, R., Beispiele zur Anwendung eines Computeralgebrasystems in der Geometrie Y1 - 1994 ER - TY - BOOK A1 - Baumgärtel, Hellmut A1 - Jurke, Matthias A1 - Lledó, Fernando T1 - Mathematische Strukturen passen auf die Natur : Reflexionen über das Wechselverhältnis von Mathematik und Physik T3 - Preprint / Universität Potsdam, Institut für Mathematik Y1 - 1994 VL - 1994, 18 PB - Univ. CY - Potsdam ER - TY - BOOK A1 - Quaisser, Erhard A1 - Wendland, Horst T1 - Seminar zur Darstellenden Geometrie : Skripte Y1 - 1994 PB - Univ. CY - Potsdam ER - TY - BOOK A1 - Schmidt, Hans-Jürgen T1 - An alternate Hamiltonian formulation of fourth-order theories T3 - Preprint / Universität Potsdam, Institut für Mathematik Y1 - 1994 VL - 1994, 12 PB - Univ. CY - Potsdam ER - TY - BOOK A1 - Quaisser, Erhard T1 - Symmetrie und Symmetriegruppen in der Geometrie : Skripte Y1 - 1994 PB - Univ. CY - Potsdam ER - TY - THES A1 - Reichel, Mario T1 - Bi-Homonorphismen und Hyperidentitäten Y1 - 1994 PB - Univ. CY - Potsdam ER - TY - THES A1 - Rainer, Martin T1 - The topology of the space of real LIE algebras up to dimension 4 with applications to homogeneous cosmological models Y1 - 1994 PB - Univ. ER - TY - BOOK A1 - Louis, Alfred K. A1 - Maaß, Peter A1 - Rieder, Andreas T1 - Wavelets : Theorie und Anwendungen Y1 - 1994 PB - Teubner CY - Stuttgart ER - TY - JOUR A1 - Maaß, Peter T1 - Wavelet galerkin methods for inverse problems Y1 - 1994 ER - TY - JOUR A1 - Neidhardt, Hagen A1 - Zagrebnov, Valentin A. T1 - Singular perturbations, regularization and extension theory Y1 - 1994 ER - TY - BOOK A1 - Quaisser, Erhard T1 - Bewegungsgeometrische Sachverhalte im Raum - unterrichtsrelevant? : Geometrieworkshop, Universität Greifswald, 30.05. - 01.06.1994 ; erweiterter Vortragsauszug Y1 - 1994 PB - Univ. CY - Greifswald ER - TY - BOOK A1 - Quaisser, Erhard T1 - Diskrete Geometrie Y1 - 1994 PB - Spektrum Akad. Verl. CY - Heidelberg [u.a.] ER - TY - JOUR A1 - Quaisser, Erhard T1 - Zwölf Punkte auf einer Kugel Y1 - 1994 ER - TY - GEN A1 - Quaisser, Erhard T1 - Liu, A.; Joe, B., Math. Comput., 63 (1994), 207, S. 141 - 154 BT - Math. Comput. Y1 - 1994 ER - TY - GEN A1 - Quaisser, Erhard T1 - Kuz`minyk, A. V., Geombinatorics, 4 (1994), 4, S. 137 - 139 BT - Geombinatorics Y1 - 1994 ER - TY - GEN A1 - Quaisser, Erhard T1 - Dehon, M., J. Symbol. Comput., 17 (1994), 3, S. 259 - 276 BT - Symbol. Comput. Y1 - 1994 ER - TY - GEN A1 - Quaisser, Erhard T1 - Johnson, N. L., J. Math., 31 (1994), 1, S. 61 - 78 BT - J. Math. Y1 - 1994 ER - TY - GEN A1 - Quaisser, Erhard T1 - Erdös, P., Geombinatorics, 4 (1994), 2, S. 48 BT - Geombinatorics Y1 - 1994 ER - TY - GEN A1 - Quaisser, Erhard T1 - Kuperberg, W., Discrete and Computational Geometry, 12 (1994), S. 83 - 90 BT - Discrete and Computational Geometry Y1 - 1994 ER -