Results 61 to 70 of about 2,670,928 (182)

Thin waveguides with Robin boundary conditions

, 2012
We consider the Laplace operator in a thin three dimensional tube with a Robin type condition on its boundary and study, asymptotically, the spectrum of such operator as the diameter of the tube's cross section becomes infinitesimal. In contrast with the
Dautray R., Guy Bouchitté, Krejčiřík D., Luís Trabucho, Luísa Mascarenhas, Maso G. D.   +5 more
core   +1 more source

Generalized viscosity solutions of elliptic PDEs and boundary conditions

Electronic Journal of Differential Equations, 2006
Sufficient conditions are given for a generalized viscosity solution of an elliptic boundary value problem to satisfy the boundary values in the strong sense.
Gustaf Gripenberg
doaj  

Boundary conditions and infrared divergences

Physics Letters B
We review the procedure to construct quasi-free ground states, for real scalar fields whose dynamics is dictated by the Klein-Gordon equation, on standard static Lorentzian manifolds with a time-like boundary.
Lissa de Souza Campos, Claudio Dappiaggi, Luca Sinibaldi   +2 more
doaj   +1 more source

Chiral anomaly for local boundary conditions

, 2003
It is known that in the zeta function regularization and in the Fujikawa method chiral anomaly is defined through a coefficient in the heat kernel expansion for the Dirac operator.
Adler, Andrianov, Andrianov, Andrianov, Atiyah, Barvinsky, Bell, Beneventano, Bertlmann, Blau, Bordag, Bordag, Branson, Branson, Branson, Branson, Branson, Branson, Chen, Chodos, Chodos, Chodos, Cognola, De Berredo-Peixoto, DeGrand, DeWitt, Dmitri V. Vassilevich, Eguchi, Esposito, Faddeev, Faddeev, Fujikawa, Gabadadze, Gilkey, Gilkey, Gilkey, Gorbar, Groot Nibbelink, Hofmann, Hrasko, Kalloniatis, Lindstrom, Novozhilov, Novozhilov, Obukhov, Symanzik, Valery N. Marachevsky, Vassilevich, Vassilevich, Wess, Wipf, Yajima, Zinn-Justin   +52 more
core   +1 more source

Magnetohydrodynamic channel flow and variational principles

International 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

Fluid boundary conditions from AdS/BCFT

Journal of High Energy Physics
In this paper, we initiate our program to classify conformal fluid boundary conditions, by utilizing the fluid/gravity correspondence in the AdS/BCFT correspondence.
Tomohito Shiga, Kenta Suzuki
doaj   +1 more source

On singular $p$-Laplacian boundary value problems involving integral boundary conditions

Electronic Journal of Qualitative Theory of Differential Equations, 2019
We prove the existence of positive solutions for the $p$-Laplacian equations \[-(\phi (u^{\prime }))^{\prime }=\lambda f(t,u),\qquad t\in (0,1) \] with integral boundary conditions. Here $\lambda $ is a positive parameter, $\phi (s)=|s|^{p-2}s,p>1,\ f:(0,
Dang Dinh Hai, Xiao Wang
doaj   +1 more source

Boundary conditions in local electrostatics algorithms

, 2008
We study the simulation of charged systems in the presence of general boundary conditions in a local Monte Carlo algorithm based on a constrained electric field.
A. C. Maggs, L. Levrel, Landau L. D., Schwinger J.   +3 more
core   +2 more sources

Nonlinear Schrodinger equations on the half-line with nonlinear boundary conditions

Electronic Journal of Differential Equations, 2016
In this article, we study the initial boundary value problem for nonlinear Schrodinger equations on the half-line with nonlinear boundary conditions $$ u_x(0,t)+\lambda|u(0,t)|^ru(0,t)=0,\quad \lambda\in\mathbb{R}-\{0\},\; r> 0.
Ahmet Batal, Turker Ozsari
doaj  

Positive solutions of singular Hadamard-type fractional differential equations with infinite-point boundary conditions or integral boundary conditions

Advances in Difference Equations, 2019
We establish the existence of positive solutions to a class of a singular nonlinear Hadamard-type fractional differential equations with infinite-point boundary conditions (BCs) or integral BCs.
A. M. A. El-Sayed, F. M. Gaafar
doaj   +1 more source