@article{Schmidt2005, author = {Schmidt, Hans-J{\"u}rgen}, title = {Schwarzschild and Synge once again}, issn = {0001-7701}, year = {2005}, abstract = {We complete the historical overview about the geometry of a Schwarzschild black hole at its horizon by emphasizing the contribution made by Synge in [6] to its clarification}, language = {en} } @article{Schmidt2005, author = {Schmidt, Hans-J{\"u}rgen}, title = {Untitled}, year = {2005}, language = {de} } @article{Schmidt2003, author = {Schmidt, Hans-J{\"u}rgen}, title = {The square of the Weyl tensor can be negative}, year = {2003}, abstract = {We show that the square of the Weyl tensor can be negative by giving an example}, language = {en} } @article{CanforaSchmidt2003, author = {Canfora, Fabrizio and Schmidt, Hans-J{\"u}rgen}, title = {Vacuum solutions which cannot be written in diagonal form}, year = {2003}, abstract = {A vacuum solution of the Einstein gravitational field equation is shown to follow from a general ansatz but fails to follow from it if the symmetric matrix in it is assumed to be in diagonal form.}, language = {en} } @article{KleinertSchmidt2002, author = {Kleinert, Hagen and Schmidt, Hans-J{\"u}rgen}, title = {Cosmology with curvature-saturated gravitational lagrangian}, year = {2002}, abstract = {We argue that the Lagrangian L(R) for gravity should remain bounded at large curvature, and interpolate between the weak-field tested Einstein-Hilbert Lagrangian and a pure cosmological constant for large R with the curvature- saturated ansatz. The curvature-dependent effective gravitational constant tends to infinity for large R, in contrast to most other approaches where it tends to 0. The theory possesses neither ghosts nor tachyons, but it fails to be linearization stable. On the technical side we show that two different conformal transformations make L asymptotically equivalent to the Gurovich-ansatz on the one hand, and to Einstein's theory with a minimally coupled scalar field with self-interaction on the other.}, language = {en} } @article{DzhunushalievRurenkoSchmidt2002, author = {Dzhunushaliev, Vladimir and Rurenko, O. and Schmidt, Hans-J{\"u}rgen}, title = {Spherically symmetric solutions in multidimensional gravity with the SU(2) gauge group as the extra dimensions}, year = {2002}, language = {en} } @article{GorbatenkoPushkinSchmidt2002, author = {Gorbatenko, M. V. and Pushkin, A. V. and Schmidt, Hans-J{\"u}rgen}, title = {On a relation between the Bach equation and the equation of geometrodynamics}, year = {2002}, abstract = {The Bach equation and the equation of geometrodynamics are based on two quite different physical motivations, but in both approaches, the conformal properties of gravitation plays the key role. In this paper we present an analysis of the relation between these two equations and show that the solutions of the equation of geometrodynamics are of a more general nature. We show the following non-trivial result: there exists a conformally invariant Lagrangian, whose field equation generalizes the Bach equation and has as solutions those Ricci tensors which are solutions to the equation of geometrodynamics.}, language = {en} } @article{GurovichSchmidtTokareva2001, author = {Gurovich, Viktor and Schmidt, Hans-J{\"u}rgen and Tokareva, Ira}, title = {Tunneling of the closed Friedmann Universe with generation of scalar waves}, year = {2001}, abstract = {The evolution of the closed Friedmann Universe with a packet of short scalar waves is considered with the help of the Wheeler-DeWitt equation. The packet ensures conservation of homogeneity and isotropy of the metric on average. It is shown that during tunneling the amplitudes of short waves of a scalar field can increase catastrophically promptly if their influence to the metric is not taken into account. This effect is similar to the Rubakov-effect of catastrophic particle creation calculated already in 1984. In our approach to the problem it is possible to consider a self- consistent dynamics of the expansion of the Universe and amplification of short waves. It results in a decrease of the barrier and interruption of amplification of waves, and we get an exit of the wave function from the quantum to the classically available region.}, language = {en} } @book{HooftHolsteinMakrietal.2001, author = {Hooft, Gerard and Holstein, Barry and Makri, Nancy and Duru, Ismail and Ruffini, Remo and Janke, Wolfhard and Pelster, Axel and Schmidt, Hans-J{\"u}rgen and Bachmann, Michael}, title = {Fluctuating paths and fields : festschrift dedicated to Hagen Kleinert on the occasion of his 60the birthday}, publisher = {World Scientific}, address = {River Edge, NJ}, isbn = {981-02-4648-X}, pages = {871 S.}, year = {2001}, language = {en} } @article{Schmidt2000, author = {Schmidt, Hans-J{\"u}rgen}, title = {Eichfeldtheorie}, year = {2000}, language = {de} } @article{BachmannSchmidt2000, author = {Bachmann, Michael and Schmidt, Hans-J{\"u}rgen}, title = {Period-doubling bifurcation in strongly anisotropic Bianchi I quantum cosmology}, year = {2000}, language = {en} } @article{CapozzielloLambiaseSchmidt2000, author = {Capozziello, Salvatore and Lambiase, G. and Schmidt, Hans-J{\"u}rgen}, title = {Nonminimal derivative couplings and inflation in generalized theories of gravity}, year = {2000}, language = {en} } @article{DzhunushalievSchmidt2000, author = {Dzhunushaliev, Vladimir and Schmidt, Hans-J{\"u}rgen}, title = {New vacuum solutions of conformal Weyl gravity}, year = {2000}, language = {en} } @article{DzhunushalievSchmidt2000, author = {Dzhunushaliev, Vladimir and Schmidt, Hans-J{\"u}rgen}, title = {Wormholes and Flux Tubes in the 7D Gravity on the Principal Bundle with SU(2) Gauge Group as the Extra Dimensions}, year = {2000}, language = {en} } @article{DzhunushalievSchmidt2000, author = {Dzhunushaliev, Vladimir and Schmidt, Hans-J{\"u}rgen}, title = {Flux Tubes in Weyl Gravity}, year = {2000}, language = {en} } @article{Schmidt2000, author = {Schmidt, Hans-J{\"u}rgen}, title = {Editor's note to A. Sakharov}, year = {2000}, language = {en} } @article{Schmidt2000, author = {Schmidt, Hans-J{\"u}rgen}, title = {On a new conformal duality of spherically symmetric space-times}, year = {2000}, language = {en} } @article{Schmidt2000, author = {Schmidt, Hans-J{\"u}rgen}, title = {Topologische Aspekte in der Kosmologie}, year = {2000}, language = {de} } @article{Schmidt2000, author = {Schmidt, Hans-J{\"u}rgen}, title = {Allgemeine Relativit{\"a}tstheorie}, year = {2000}, language = {de} } @article{Schmidt2000, author = {Schmidt, Hans-J{\"u}rgen}, title = {On a new conformal duality of spherically symmetric space-times}, year = {2000}, language = {en} } @article{DzhunushalievSchmidt1999, author = {Dzhunushaliev, Vladimir and Schmidt, Hans-J{\"u}rgen}, title = {2+2-decomposable solutions of weyl gravity}, year = {1999}, language = {en} } @article{BachmannSchmidt1999, author = {Bachmann, Michael and Schmidt, Hans-J{\"u}rgen}, title = {Period-doubling bifurcation in strongly anisotropic Bianchi I quantum cosmology}, series = {General relativity and quantum cosmology : preprints gr-qc}, volume = {9912068}, journal = {General relativity and quantum cosmology : preprints gr-qc}, year = {1999}, language = {en} } @article{DzhunushalievSchmidt1999, author = {Dzhunushaliev, Vladimir and Schmidt, Hans-J{\"u}rgen}, title = {4D wormhole with signature change in the presence of extra dimensions}, series = {General relativity and quantum cosmology : preprints gr-qc}, volume = {9908076}, journal = {General relativity and quantum cosmology : preprints gr-qc}, year = {1999}, language = {en} } @misc{Schmidt1999, author = {Schmidt, Hans-J{\"u}rgen}, title = {Cercignani, C., Scaling limits and models in physical process; Basel, Birkh{\"a}user, 1998}, year = {1999}, language = {en} } @article{Schmidt1999, author = {Schmidt, Hans-J{\"u}rgen}, title = {Editor{\"i}s note}, year = {1999}, language = {de} } @article{Schmidt1999, author = {Schmidt, Hans-J{\"u}rgen}, title = {The classical solutions of two-dimensional gravity}, year = {1999}, language = {en} } @article{Schmidt1998, author = {Schmidt, Hans-J{\"u}rgen}, title = {Exact cosmological solutions of nonlinear F(R)-gravity}, series = {General relativity and quantum cosmology : preprints gr-qc}, volume = {9808060}, journal = {General relativity and quantum cosmology : preprints gr-qc}, year = {1998}, language = {en} } @book{Schmidt1998, author = {Schmidt, Hans-J{\"u}rgen}, title = {Current topics in mathematical cosmology : proceedings of the International Seminar ; Potsdam, Germany 30 March 4 April 1998}, editor = {Rainer, Martin}, publisher = {World Scientific}, address = {Singapore [u.a.]}, isbn = {981-023627-1}, pages = {XVII, 484 S.}, year = {1998}, language = {en} } @article{Schmidt1998, author = {Schmidt, Hans-J{\"u}rgen}, title = {Exact cosmological solutions of nonlinear F(R)-gravity}, isbn = {981-023627-1}, year = {1998}, language = {en} } @article{Schmidt1998, author = {Schmidt, Hans-J{\"u}rgen}, title = {Gravitation in 1+1 Dimensionen : exacte L{\"o}sungen, Konformrelationen und Beziehungen zum 3+1 -dimensionalen Fall}, year = {1998}, language = {de} } @article{Schmidt1998, author = {Schmidt, Hans-J{\"u}rgen}, title = {A two-dimensional representation of four-dimensional graviational waves}, year = {1998}, language = {en} } @article{Schmidt1998, author = {Schmidt, Hans-J{\"u}rgen}, title = {Consequences of the noncompactness of the Lorentz group}, year = {1998}, language = {en} } @misc{Schmidt1998, author = {Schmidt, Hans-J{\"u}rgen}, title = {Karsinski, A., Inhomogeneous cosmological models; Cambridge, Univ. Press, 1997}, year = {1998}, language = {en} } @article{Schmidt1998, author = {Schmidt, Hans-J{\"u}rgen}, title = {2-dimensional representations of 4-dimensional gravitational waves}, year = {1998}, language = {en} } @article{Schmidt1997, author = {Schmidt, Hans-J{\"u}rgen}, title = {A new duality transformation for fouth-order gravity}, year = {1997}, language = {en} } @article{Schmidt1997, author = {Schmidt, Hans-J{\"u}rgen}, title = {Memorial notice to J. Huang}, year = {1997}, language = {en} } @article{Schmidt1997, author = {Schmidt, Hans-J{\"u}rgen}, title = {Klassiker der Kosmologie}, year = {1997}, language = {de} } @article{Schmidt1997, author = {Schmidt, Hans-J{\"u}rgen}, title = {A new proof of Birkhoff{\"i}s theorem}, year = {1997}, language = {en} } @article{Schmidt1997, author = {Schmidt, Hans-J{\"u}rgen}, title = {Conformal relations and Hamiltonian formlation of fourth-order gravity}, year = {1997}, language = {en} } @article{Schmidt1997, author = {Schmidt, Hans-J{\"u}rgen}, title = {Pictorial examples that distinguish covariant and contravariant vectors}, year = {1997}, language = {en} } @article{MeisterSchmidt1997, author = {Meister, Claudia-Veronika and Schmidt, Hans-J{\"u}rgen}, title = {Jahresberichte 1996}, year = {1997}, language = {de} } @article{Schmidt1997, author = {Schmidt, Hans-J{\"u}rgen}, title = {Janyska, Josef [u.a.](Ed.) Differential geometry and applications : proceedings of the 6th international conference Brno, August 28 - September 1, 1995; Brno, Masaryk Univ., 1996}, year = {1997}, language = {en} } @article{Schmidt1997, author = {Schmidt, Hans-J{\"u}rgen}, title = {New steps towards a proof of the cosmological "no hair" theorem}, isbn = {981-023499-6}, year = {1997}, language = {en} } @article{Schmidt1997, author = {Schmidt, Hans-J{\"u}rgen}, title = {New conformal relations in fourth-order gravity}, year = {1997}, language = {en} } @article{Schmidt1996, author = {Schmidt, Hans-J{\"u}rgen}, title = {Classical mechanics with lapse}, year = {1996}, language = {en} } @article{Schmidt1996, author = {Schmidt, Hans-J{\"u}rgen}, title = {Editorial}, year = {1996}, language = {de} } @article{Schmidt1996, author = {Schmidt, Hans-J{\"u}rgen}, title = {How should we measure spatial distances?}, year = {1996}, language = {en} } @article{Schmidt1996, author = {Schmidt, Hans-J{\"u}rgen}, title = {Why do all the curvature invariants of a gravitational wave vanish?}, year = {1996}, language = {en} } @article{KluskeSchmidt1996, author = {Kluske, Sabine and Schmidt, Hans-J{\"u}rgen}, title = {Towards a cosmic no hair theorem for higher-order gravity}, year = {1996}, language = {en} } @book{Schmidt1995, author = {Schmidt, Hans-J{\"u}rgen}, title = {An alternate Hamiltonian formulation of fourth-order theories}, address = {Potsdam}, year = {1995}, language = {en} } @article{Schmidt1995, author = {Schmidt, Hans-J{\"u}rgen}, title = {Comment on conformal transformations single out a unique measure of distance}, year = {1995}, language = {en} } @book{Schmidt1995, author = {Schmidt, Hans-J{\"u}rgen}, title = {How to measure spatial distances?}, series = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik}, volume = {1995, 10}, journal = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik}, publisher = {Univ.}, address = {Potsdam}, pages = {4 Bl.}, year = {1995}, language = {en} } @article{SchmidtKasperKluskeetal.1995, author = {Schmidt, Hans-J{\"u}rgen and Kasper, Uwe and Kluske, Sabine and Rainer, Martin and Reuter, Stefan}, title = {Stability properties of the Starobinsky cosmological model}, year = {1995}, language = {en} } @book{SchmidtMignemi1995, author = {Schmidt, Hans-J{\"u}rgen and Mignemi, Salvatore}, title = {Two-dimensional higher-derivative gravity and conformal transformations}, year = {1995}, language = {en} } @article{SchmidtKasper1995, author = {Schmidt, Hans-J{\"u}rgen and Kasper, Uwe}, title = {Differentialgeometrische Grundlagen der Kosmologie}, year = {1995}, language = {de} } @article{Schmidt1995, author = {Schmidt, Hans-J{\"u}rgen}, title = {Editorial}, year = {1995}, language = {de} } @article{Schmidt1995, author = {Schmidt, Hans-J{\"u}rgen}, title = {Gedenkkolloquien anl{\"a}ßlich des 100. Todestages von Hermann von Helmholtz, Kolloquium an der Universit{\"a}t Potsdam}, year = {1995}, language = {de} } @article{SchmidtRainer1995, author = {Schmidt, Hans-J{\"u}rgen and Rainer, Martin}, title = {Inhomogeneous cosmological models with homogeneous inner hypersurface geometry}, year = {1995}, language = {en} } @article{Schmidt1995, author = {Schmidt, Hans-J{\"u}rgen}, title = {Kurzautobiographie}, year = {1995}, language = {de} } @article{SchmidtRainer1995, author = {Schmidt, Hans-J{\"u}rgen and Rainer, Martin}, title = {The natural classification of real lie algebras}, year = {1995}, language = {en} } @article{Schmidt1995, author = {Schmidt, Hans-J{\"u}rgen}, title = {On space-times which cannot be distinguished by curvature invariants}, year = {1995}, language = {en} } @article{Schmidt1995, author = {Schmidt, Hans-J{\"u}rgen}, title = {On the space of 3-dimensional homogeneous Riemannian manifolds}, year = {1995}, language = {en} } @book{SchmidtKluske1995, author = {Schmidt, Hans-J{\"u}rgen and Kluske, Sabine}, title = {Towards a no hair theorem for higher order gravit}, year = {1995}, language = {en} } @article{SchmidtMignemi1995, author = {Schmidt, Hans-J{\"u}rgen and Mignemi, Salvatore}, title = {Two-dimensional higher-derivative gravity and conformal transformations}, year = {1995}, language = {en} } @book{Schmidt1995, author = {Schmidt, Hans-J{\"u}rgen}, title = {Consequences of the noncompactness of the Lorentz group}, year = {1995}, language = {en} } @book{SchmidtMohazzabRainer1995, author = {Schmidt, Hans-J{\"u}rgen and Mohazzab, Masoud and Rainer, Martin}, title = {Deformations between Bianchi geometries in classical and quantum cosmology}, series = {Report IPM}, volume = {1995, 91}, journal = {Report IPM}, publisher = {IPM}, address = {Teheran}, year = {1995}, language = {en} } @book{Schmidt1995, author = {Schmidt, Hans-J{\"u}rgen}, title = {Consequences of the noncompactness of the Lorentz group}, series = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik}, volume = {1995, 09}, journal = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik}, publisher = {Univ.}, address = {Potsdam}, pages = {7 Bl.}, year = {1995}, language = {en} } @book{Schmidt1994, author = {Schmidt, Hans-J{\"u}rgen}, title = {Why do all the curvature invariants of a gravitational wave vanish?}, series = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik}, volume = {1994, 03}, journal = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik}, publisher = {Univ.}, address = {Potsdam}, pages = {7 Bl.}, year = {1994}, language = {en} } @book{Schmidt1994, author = {Schmidt, Hans-J{\"u}rgen}, title = {Stability and Hamiltonian formulation of higher derivative theories}, series = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik}, volume = {1994, 04}, journal = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik}, publisher = {Univ.}, address = {Potsdam}, pages = {37 Bl.}, year = {1994}, language = {en} } @book{ReuterSchmidt1994, author = {Reuter, Stefan and Schmidt, Hans-J{\"u}rgen}, title = {Klassisch konform{\"a}quivalente Gravitationstheorien und deren korrespondierende Wheeler-de-Witt-Gleichungen}, series = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik}, volume = {1994, 05}, journal = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik}, publisher = {Univ.}, address = {Potsdam}, pages = {17 S.}, year = {1994}, language = {de} } @article{SchmidtBaierBleyeretal.1994, author = {Schmidt, Hans-J{\"u}rgen and Baier, Frank W. and Bleyer, Ulrich and Hubrig, Swetlana and Meister, Claudia-Veronika and Schilbach, Elena and Tiersch, Heinz}, title = {Zum Wissenschaftler-Integrationsprogramm}, year = {1994}, language = {de} } @book{Schmidt1994, author = {Schmidt, Hans-J{\"u}rgen}, title = {An alternate Hamiltonian formulation of fourth-order theories}, series = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik}, volume = {1994, 12}, journal = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik}, publisher = {Univ.}, address = {Potsdam}, year = {1994}, language = {en} } @book{Schmidt1994, author = {Schmidt, Hans-J{\"u}rgen}, title = {Physikalische Konsequenzen von Gravitationsfeldgleichungen vierter Ordnung bei der Beschreibung des fr{\"u}hen Universums und isolierter Gravitationsfelder}, publisher = {Tectum}, address = {Marburg}, year = {1994}, language = {de} } @article{Schmidt1994, author = {Schmidt, Hans-J{\"u}rgen}, title = {Aufgaben zur Kosmologie}, year = {1994}, language = {de} } @article{Schmidt1994, author = {Schmidt, Hans-J{\"u}rgen}, title = {Comment on stability of the semiclassical Einstein equation}, year = {1994}, language = {en} } @article{Schmidt1994, author = {Schmidt, Hans-J{\"u}rgen}, title = {Jahresbericht 1993}, year = {1994}, language = {de} } @article{SchmidtReuter1994, author = {Schmidt, Hans-J{\"u}rgen and Reuter, Stefan}, title = {Klassisch konform{\"a}quivalente Gravitationstheorien und deren korrespondierende Wheeler-de Witt-Gleichungen}, year = {1994}, language = {de} } @article{Schmidt1994, author = {Schmidt, Hans-J{\"u}rgen}, title = {Personengenau und sehr prononciert : Leserbrief}, year = {1994}, language = {de} } @article{Schmidt1994, author = {Schmidt, Hans-J{\"u}rgen}, title = {Stability and Hamiltonian formulation of higher derivative theories}, year = {1994}, language = {en} } @article{Schmidt1994, author = {Schmidt, Hans-J{\"u}rgen}, title = {WIP-Projekt "Kosmologie"}, year = {1994}, language = {de} } @book{BattagliaMayerSchmidt1993, author = {Battaglia Mayer, Alexandra and Schmidt, Hans-J{\"u}rgen}, title = {The de Sitter space-time as attractor solution in eighth order gravity}, series = {Preprint / Universit{\"a}t Potsdam, Fachbereich Mathematik}, volume = {1993, 05}, journal = {Preprint / Universit{\"a}t Potsdam, Fachbereich Mathematik}, publisher = {Univ.}, address = {Potsdam}, pages = {9 S.}, year = {1993}, language = {en} } @book{Schmidt1993, author = {Schmidt, Hans-J{\"u}rgen}, title = {Comment to a paper by J. Simon in Phys. Rev. D 45 (1992) 1953}, series = {Preprint / Universit{\"a}t Potsdam, Fachbereich Mathematik}, volume = {1993, 06}, journal = {Preprint / Universit{\"a}t Potsdam, Fachbereich Mathematik}, publisher = {Univ.}, address = {Potsdam}, pages = {23 Bl.}, year = {1993}, language = {en} } @book{SchmidtWang1992, author = {Schmidt, Hans-J{\"u}rgen and Wang, Anzhong}, title = {Plane domain walls when coupled with the Brans-Dicke scalar field}, series = {Preprint / Universit{\"a}t Potsdam, Fachbereich Mathematik}, volume = {1992, 06}, journal = {Preprint / Universit{\"a}t Potsdam, Fachbereich Mathematik}, publisher = {Univ.}, address = {Potsdam}, pages = {27 S.}, year = {1992}, language = {en} } @book{Schmidt1992, author = {Schmidt, Hans-J{\"u}rgen}, title = {On inflation within closed Fiedmann universe models}, series = {Preprint / Universit{\"a}t Potsdam, Fachbereich Mathematik}, volume = {1992, 02}, journal = {Preprint / Universit{\"a}t Potsdam, Fachbereich Mathematik}, publisher = {Univ.}, address = {Potsdam}, pages = {9 Bl.}, year = {1992}, language = {en} } @book{Schmidt1992, author = {Schmidt, Hans-J{\"u}rgen}, title = {Scale-invariant gravity in two dimensions II}, series = {Preprint / Universit{\"a}t Potsdam, Fachbereich Mathematik}, volume = {1992, 03}, journal = {Preprint / Universit{\"a}t Potsdam, Fachbereich Mathematik}, publisher = {Univ.}, address = {Potsdam}, pages = {[3] Bl.}, year = {1992}, language = {en} } @article{AmendolaBattagliaMayerCapozzielloetal.1992, author = {Amendola, Luca and Battaglia Mayer, Alexandra and Capozziello, Salvatore and Gottl{\"o}ber, Stefan and M{\"u}ller, Volker and Occhionero, Franco and Schmidt, Hans-J{\"u}rgen}, title = {Generalized sixth-order gravity and inflation}, series = {Preprint / Universit{\"a}t Potsdam, Fachbereich Mathematik}, volume = {1992, 04}, journal = {Preprint / Universit{\"a}t Potsdam, Fachbereich Mathematik}, publisher = {Univ.}, address = {Potsdam}, pages = {7 S.}, year = {1992}, language = {en} } @article{GottloeberSchmidtStarobinskyetal.1992, author = {Gottl{\"o}ber, Stefan and Schmidt, Hans-J{\"u}rgen and Starobinsky, A. A. and M{\"u}ller, Volker}, title = {Models of chaotic inflation}, series = {Preprint / Universit{\"a}t Potsdam, Fachbereich Mathematik}, volume = {1992, 08}, journal = {Preprint / Universit{\"a}t Potsdam, Fachbereich Mathematik}, publisher = {Univ.}, address = {Potsdam}, pages = {24 S.}, year = {1992}, language = {en} } @book{Schmidt1992, author = {Schmidt, Hans-J{\"u}rgen}, title = {On the de Sitter space-time : the geometric foundation of infaltionary cosmology}, series = {Preprint / Universit{\"a}t Potsdam, Fachbereich Mathematik}, volume = {1992, 10}, journal = {Preprint / Universit{\"a}t Potsdam, Fachbereich Mathematik}, publisher = {Univ.}, address = {Potsdam}, pages = {43 S.}, year = {1992}, language = {en} } @book{ReuterSchmidt1992, author = {Reuter, Stefan and Schmidt, Hans-J{\"u}rgen}, title = {On the Wheeler-de Witt equation for homogeneous cosmological models}, series = {Preprint / Universit{\"a}t Potsdam, Fachbereich Mathematik}, volume = {1992, 11}, journal = {Preprint / Universit{\"a}t Potsdam, Fachbereich Mathematik}, publisher = {Univ.}, address = {Potsdam}, pages = {16 Bl.}, year = {1992}, language = {en} }