Results 51 to 60 of about 1,731,356 (293)

Exact Cosmological Solutions of Gravitational Theories

, 1987
A global picture is drawn tying together most exact cosmological solutions of gravitational theories in four or more spacetime dimensions.Comment: 11 latex article style ...
Arnowit, Barrow, Belinsky, Bonanos, Brill, Brill, Castellani, Castellani, Demaret, Demaret, DeWitt, Ellis, Englert, Freund, Freund, Harrison, Henneaux, Jantzen, Jantzen, Jantzen, Jantzen, Jantzen, Joseph, Kantowski, Kramer, Lorentz-Petzold, Lorentz-Petzold, Lorentz-Petzold, Lorentz-Petzold, Lorentz-Petzold, Lorentz-Petzold, Lorentz-Petzold, MacCallum, Misner, Misner, Misner, Misner, Misner, Robert T. Jantzen, Taub   +39 more
core   +2 more sources

Correlated Lloyd model: Exact solution [PDF]

Theoretical and Mathematical Physics, 2014
Exactly solvable model of disordered system representing the generalized Lloyd model with correlated random potential is described. It is shown, that for the model under consideration, the averaged Green's function does not depend on random potential correlation radius and, similarly to the classical Lloyd model, has the form of Green's function of a ...
openaire   +2 more sources

Predicting Chronicity in Children and Adolescents With Newly Diagnosed Immune Thrombocytopenia at the Timepoint of Diagnosis Using Machine Learning‐Based Approaches

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Objectives To identify predictors of chronic ITP (cITP) and to develop a model based on several machine learning (ML) methods to estimate the individual risk of chronicity at the timepoint of diagnosis. Methods We analyzed a longitudinal cohort of 944 children enrolled in the Intercontinental Cooperative immune thrombocytopenia (ITP) Study ...
Severin Kasser, Alice Bizeul, Meera Chitlur, Hugo Donato, Jelena Roganovic, Julia E. Vogt, Thomas Kühne   +6 more
wiley   +1 more source

The exact cosmological solutions for phantom fields

Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2011
The application of the method of super-potential to solution of the problems of cosmology with phantom fields is examined. The classes of exact solutions are found and the periods of time with the predominance of dark energy are established.
S. V. Chervon, O. G. Panina
doaj   +3 more sources

Exact Solutions of the Equations of Relativistic Hydrodynamics Representing Potential Flows

Symmetry, Integrability and Geometry: Methods and Applications, 2007
We use a connection between relativistic hydrodynamics and scalar field theory to generate exact analytic solutions describing non-stationary inhomogeneous flows of the perfect fluid with one-parametric equation of state (EOS) $p=p(varepsilon)$.
Maxim S. Borshch, Valery I. Zhdanov
doaj  

Exact solutions to the Erdős-Rothschild problem

Forum of Mathematics, Sigma
Let $\boldsymbol {k} := (k_1,\ldots ,k_s)$ be a sequence of natural numbers. For a graph G, let $F(G;\boldsymbol {k})$ denote the number of colourings of the edges of G with colours $1,\dots ,s$ such that, for every $c \in \{1 ...
Oleg Pikhurko, Katherine Staden
doaj   +1 more source

Fractional solitons: New phenomena and exact solutions

Frontiers in Physics, 2023
The fractional solitons have demonstrated many new phenomena, which cannot be explained by the traditional solitary wave theory. This paper studies some famous fractional wave equations including the fractional KdV–Burgers equation and the fractional ...
Huajun Zeng, Yuxia Wang, Min Xiao, Ying Wang   +3 more
doaj   +1 more source

A Systematic Review of Evidence on the Clinical Effectiveness of Surveillance Imaging in Children With Medulloblastoma and Ependymoma

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Surveillance imaging aims to detect tumour relapse before symptoms develop, but it's unclear whether earlier detection of relapse leads to better outcomes in children and young people (CYP) with medulloblastoma and ependymoma. This systematic review aims to identify relevant literature to determine the efficacy of surveillance magnetic ...
Lucy Shepherd, Melissa Taylor, Helen Fulbright, Bob Phillips   +3 more
wiley   +1 more source

Vaidya-like exact solutions with torsion

, 2015
Starting from the Oliva--Tempo--Troncoso black hole, a solution of the Bergshoeff--Hohm--Townsend massive gravity, a class of the Vaidya-like exact vacuum solutions with torsion is constructed in the three-dimensional Poincar\'e gauge theory.
Blagojević, M., Cvetković, B.
core   +1 more source

New exact solutions in standard inflationary models [PDF]

, 1997
The exact solutions in the standard inflationary model based on the self-interacting scalar field minimally coupled to gravity are considered. The shape's freedom of the self-interacting potential $V(\phi)$ is postulated to obtain a new set of the exact ...
Albrecht, Barrow, Barrow, Barrow, Barrow, Buchbinder, Chervon, Chervon, Chervon, Chervon, Chervon, Coleman, Ellis, Guth, Ivanov, Linde, Linde, Muslimov, Olive, Parsons, S.V. Chervon, Salopek, Salopek, Shafi, Shchigolev, Starobinsky, Turner, V.K. Shchigolev, V.m. Zhuravlev   +28 more
core   +2 more sources