Gen Relativ Gravit manuscript No. (will be inserted by the editor)
نویسنده
چکیده
Quantum geometrodynamics is canonical quantum gravity with the three-metric as the configuration variable. Its central equation is the Wheeler–DeWitt equation. Here I give an overview of the status of this approach. The issues discussed include the problem of time, the relation to the covariant theory, the semiclassical approximation as well as applications to black holes and cosmology. I conclude that quantum geometrodynamics is still a viable approach and provides insights into both the conceptual and technical aspects of quantum gravity.
منابع مشابه
Environmental gamma radiation: a comment (Letter to the Editor)
Editor, I read the recent publication by Toossi et al. with a great interest (1). Toossi et al. concluded that “Average gonad and bone marrow doses for North Khorasan, Boshehr and Hormozgan provinces were less than the corresponding values for normal area (2).” There are some facts on this report to be concerned. I agree that the detected levels might be high in the mentioned area, but th...
متن کاملCanonical Big Cohen-Macaulay Algebras with Applications to Singularities
A canonical construction of a balanced big Cohen-Macaulay algebra for a domain of finite type over C is obtained by taking ultraproducts of absolute integral closures in positive characteristic. Among the applications are a new tight closure characterization of rational singularities in characteristic zero, and a necessary condition for Q-Gorenstein logterminal singularities. In particular, it ...
متن کاملLetter of Editor-in-Chief
Dear Colleagues, As Editor-In-Chief of Journal of Cardio-Thoracic Medicine (JCTM), it is my pleasure to introduce this official quarterly publication of Mashhad University of Medical Sciences, which is an international, peer-reviewed, and English language journal. Our aim is to publish high quality integrating clinical and experimental research in the following fields: Respiratory medici...
متن کاملNumerische Mathematik Manuscript No. a Residual Based Error Estimator for Mortar Nite Element Discretizations
The date of receipt and acceptance will be inserted by the editor Summary A residual based error estimator for the approximation of linear elliptic boundary value problems by nonconforming nite element methods is introduced and analyzed. In particular, we consider mortar nite element techniques. restricting ourselves to geometrically conforming domain decomposition methods using P1 approximatio...
متن کاملVisual Contours and Planar Sections for Affine Immersions
In this paper we consider planar sections and visual contours of co-dimension one affine immersions. The main theorem says that the third order Taylor expansion of the difference between the visual contour and planar section functions is exactly the cubic form. We also consider parameterizations on two dimensional affine immersions whose coordinate lines are geodesics, in one direction, and bot...
متن کامل