Results 71 to 80 of about 2,670,928 (182)

Enhanced Asymptotic Symmetry Algebra of 2+1 Dimensional Flat Space

, 2017
In this paper we present a new set of asymptotic boundary conditions for Einstein gravity in 2+1 dimensions with vanishing cosmological constant that are a generalization of the Barnich-Comp{\`e}re boundary conditions gr-qc/0610130.
Detournay, Stéphane, Riegler, Max
core   +1 more source

Positive solutions to a third order nonlocal boundary value problem with a parameter [PDF]

Opuscula Mathematica
We present some sufficient conditions for the existence of positive solutions to a third order differential equation subject to nonlocal boundary conditions.
Gabriela Szajnowska, Mirosława Zima
doaj   +1 more source

The asymptotic equivalence of fixed heat flux and fixed temperature thermal boundary conditions for rapidly rotating convection

, 2015
The influence of fixed temperature and fixed heat flux thermal boundary conditions on rapidly rotating convection in the plane layer geometry is investigated for the case of stress-free mechanical boundary conditions. It is shown that whereas the leading
Calkins, Michael A., Driggs, Derek, Hale, Kevin, Julien, Keith, Marti, Philippe, Nieves, David   +5 more
core   +1 more source

Casimir pistons with general boundary conditions

Nuclear Physics B, 2015
In this work we analyze the Casimir energy and force for a scalar field endowed with general self-adjoint boundary conditions propagating in a higher dimensional piston configuration.
Guglielmo Fucci
doaj   +1 more source

Guide to Boundary Value Problems for Dirac-Type Operators

, 2013
We present an introduction to boundary value problems for Dirac-type operators on complete Riemannian manifolds with compact boundary. We introduce a very general class of boundary conditions which contains local elliptic boundary conditions in the sense
Baer, Christian, Ballmann, Werner
core  

Sturm-Liouville operator with general boundary conditions

Electronic Journal of Differential Equations, 2005
We classify the general linear boundary conditions involving $u''$, $u'$ and $u$ on the boundary ${a,b}$ so that a Sturm-Liouville operator on $[a,b]$ has a unique self-adjoint extension on a suitable Hilbert space.
Ciprian G. Gal
doaj  

Antireflective Boundary Conditions for Deblurring Problems

Journal of Electrical and Computer Engineering, 2010
This survey paper deals with the use of antireflective boundary conditions for deblurring problems where the issues that we consider are the precision of the reconstruction when the noise is not present, the linear algebra related to these boundary ...
Marco Donatelli, Stefano Serra-Capizzano
doaj   +1 more source

Outflow Boundary Conditions for Turbine-Integrated Rotating Detonation Combustors

Applied Sciences
This study examines outflow boundary conditions (BCs) in computational fluid dynamics (CFD) simulations of a transition duct with and without guide vanes that converts supersonic flow exiting a rotating detonation combustor (RDC) to subsonic flow to ...
Tsung-Ming Hsieh, K. Mark Bryden, Richard P. Dalton, John Crane, Tom I-P. Shih   +4 more
doaj   +1 more source

Positive solutions of a boundary value problem with integral boundary conditions

Electronic Journal of Differential Equations, 2011
We consider boundary-value problems studied in a recent paper. We show that some existing theory developed by Webb and Infante applies to this problem and we use the known theory to show how to find improved estimates on parameters $mu^*, lambda ...
Jeff R. L. Webb
doaj  

Eigenvalues of Sturm-Liouville problems with discontinuous boundary conditions

Electronic Journal of Differential Equations, 2017
For classical regular two-point self-adjoint Sturm-Liouville problems (SLP) the dependence of the eigenvalues on the boundary conditions is well understood because of some surprisingly recent results.
Aiping Wang, Anton Zettl
doaj