Results 11 to 20 of about 2,658,042 (281)

Black Hole Boundary Conditions and Coordinate Conditions [PDF]

open access: yes, 1997
This paper treats boundary conditions on black hole horizons for the full 3+1D Einstein equations. Following a number of authors, the apparent horizon is employed as the inner boundary on a space slice.
Douglas M. Eardley   +7 more
core   +2 more sources

Magnetohydrodynamic channel flow and variational principles

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1987
This paper deals with magnetohydrodynamic channel flow problems. Attention is given to a variational principle where the boundary conditions are incorporated via a suitable functional which is stationary at the solution of the given problem; the trial ...
Adnan A. El-Hajj
doaj   +1 more source

Low Entropy Future Boundary Conditions

open access: yesEntropy, 2022
A number of ways to detect future, low-entropy, boundary conditions are considered. The most important of these is the use of slowly-decaying isotopes and the observation (or prediction) of galactic dynamics.
Lawrence S. Schulman
doaj   +1 more source

Topological expansion and boundary conditions [PDF]

open access: yes, 2007
In this article, we compute the topological expansion of all possible mixed-traces in a hermitian two matrix model. In other words we give a recipe to compute the number of discrete surfaces of given genus, carrying an Ising model, and with all possible ...
B Eynard   +12 more
core   +5 more sources

Nahm Equations and Boundary Conditions [PDF]

open access: yes, 1998
We derive certain boundary conditions in Nahm's equations by considering a system of N parallel D1-branes perpendicular to a D3-brane in type IIB string theory.Comment: 5 pages, 1 figure. Minor changes. Two references added.
Callan   +4 more
core   +3 more sources

Boundary conditions in topological AdS4/CFT3

open access: yesJournal of High Energy Physics, 2021
We revisit the construction in four-dimensional gauged Spin(4) supergravity of the holographic duals to topologically twisted three-dimensional N $$ \mathcal{N} $$ = 4 field theories.
Pietro Benetti Genolini   +2 more
doaj   +1 more source

New boundary conditions for integrable lattices [PDF]

open access: yes, 1995
New boundary conditions for integrable nonlinear lattices of the XXX type, such as the Heisenberg chain and the Toda lattice are presented. These integrable extensions are formulated in terms of a generic XXX Heisenberg magnet interacting with two ...
Baxter R J   +19 more
core   +4 more sources

Effect of Global Atmospheric Datasets in Modeling Meteorology and Air Quality in the Andean Region of Ecuador

open access: yesAerosol and Air Quality Research, 2022
Several components such as initial (IC) and boundary conditions (BC), generated from global atmospheric datasets for studies at the regional and mesoscale levels, play a role in numerical modeling.
Rene Parra
doaj   +1 more source

Effect of Boundary Conditions on the Mechanical Behavior of the Geogrid–Soil Interface

open access: yesApplied Sciences, 2021
Geogrid-reinforced structures are extensively adopted in various engineering fields. At present, the influence of boundary conditions was not considered in design methods, bringing hidden dangers to the safety of the structure.
Zheng Zuo   +4 more
doaj   +1 more source

Probability of Boundary Conditions in Quantum Cosmology [PDF]

open access: yes, 2017
One of the main interest in quantum cosmology is to determine boundary conditions for the wave function of the universe which can predict observational data of our universe.
71351   +3 more
core   +2 more sources

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