TY - JOUR A1 - Dzhunushaliev, Vladimir A1 - Schmidt, Hans-Jürgen T1 - 2+2-decomposable solutions of weyl gravity BT - Zwei plus zwei-decomposable solutions of wey gravity Y1 - 1999 ER - TY - JOUR A1 - Schmidt, Hans-Jürgen T1 - 2-dimensional representations of 4-dimensional gravitational waves Y1 - 1998 ER - TY - JOUR A1 - Dzhunushaliev, Vladimir A1 - Schmidt, Hans-Jürgen T1 - 4D wormhole with signature change in the presence of extra dimensions BT - VierD wormhole with signature change in the presence of extra dimensions JF - General relativity and quantum cosmology : preprints gr-qc Y1 - 1999 UR - http://xxx.soton.ac.uk/form/gr-qc? VL - 9908076 ER - TY - JOUR A1 - Schmidt, Hans-Jürgen T1 - A new duality transformation for fouth-order gravity Y1 - 1997 ER - TY - JOUR A1 - Schmidt, Hans-Jürgen T1 - A new proof of Birkhoffïs theorem Y1 - 1997 ER - TY - JOUR A1 - Schmidt, Hans-Jürgen T1 - A two-dimensional representation of four-dimensional graviational waves Y1 - 1998 ER - TY - JOUR A1 - Schmidt, Hans-Jürgen T1 - Allgemeine Relativitätstheorie Y1 - 2000 ER - TY - BOOK A1 - Schmidt, Hans-Jürgen T1 - An alternate Hamiltonian formulation of fourth-order theories Y1 - 1995 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 - JOUR A1 - Schmidt, Hans-Jürgen T1 - Aufgaben zur Kosmologie Y1 - 1994 ER - TY - JOUR A1 - Schmidt, Hans-Jürgen T1 - Cercignani, C., Scaling limits and models in physical process; Basel, Birkhäuser, 1998 BT - Scaling limits and models in physical process Y1 - 1999 ER - TY - JOUR A1 - Schmidt, Hans-Jürgen T1 - Classical mechanics with lapse Y1 - 1996 ER - TY - JOUR A1 - Schmidt, Hans-Jürgen T1 - Comment on conformal transformations single out a unique measure of distance Y1 - 1995 ER - TY - JOUR A1 - Schmidt, Hans-Jürgen T1 - Comment on stability of the semiclassical Einstein equation Y1 - 1994 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 - JOUR A1 - Schmidt, Hans-Jürgen T1 - Conformal relations and Hamiltonian formlation of fourth-order gravity Y1 - 1997 ER - TY - JOUR A1 - Schmidt, Hans-Jürgen T1 - Consequences of the noncompactness of the Lorentz group Y1 - 1998 ER - TY - BOOK A1 - Schmidt, Hans-Jürgen T1 - Consequences of the noncompactness of the Lorentz group Y1 - 1995 ER - TY - BOOK A1 - Schmidt, Hans-Jürgen T1 - Consequences of the noncompactness of the Lorentz group T3 - Preprint / Universität Potsdam, Institut für Mathematik Y1 - 1995 VL - 1995, 09 PB - Univ. CY - Potsdam ER - TY - JOUR A1 - Kleinert, Hagen A1 - Schmidt, Hans-Jürgen T1 - Cosmology with curvature-saturated gravitational lagrangian N2 - 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. Y1 - 2002 UR - http://arXiv.org/abs/gr-qc/0006074 ER -