Results 31 to 40 of about 579,120 (288)

Ergodic problems and periodic homogenization for fully nonlinear equations in half-space type domains with Neumann boundary conditions [PDF]

, 2008
We study periodic homogenization problems for second-order pde in half-space type domains with Neumann boundary conditions. In particular, we are interested in "singular problems" for which it is necessary to determine both the homogenized equation and ...
Barles, Guy, Da Lio, Francesca, Lions, Pierre-Louis, Souganidis, Panagiotis E.   +3 more
core   +3 more sources

A cantilever equation with nonlinear boundary conditions

Electronic Journal of Qualitative Theory of Differential Equations, 2009
We prove new results on the existence of positive solutions for some cantilever equation subject to nonlocal and nonlinear boundary conditions. Our main ingredient is the classical fixed point index.
Gennaro Infante, P. Pietramala
doaj   +1 more source

Integrable Boundary Conditions and Reflection Matrices for the O(N) Nonlinear Sigma Model [PDF]

, 2001
We find new integrable boundary conditions, depending on a free parameter $g$, for the O(N) nonlinear $\sigma$ model, which are of nondiagonal type, that is, particles can change their ``flavor'' through scattering off the boundary.
Abad, Affleck, Ameduri, Bowcock, Callan, Callan, Corrigan, De Martino, De Martino, Ghoshal, Ghoshal, Goldschmidt, M. Moriconi, MacKay, MacKay, Mintchev, Moriconi, Polyakov, Witten, Zamolodchikov, Zamolodchikov   +20 more
core   +5 more sources

Doubly Nonlinear Parabolic Equation with Nonlinear Boundary Conditions

Journal of Mathematical Analysis and Applications, 2001
A necessary and sufficient condition for global existence of all positive classical solutions is given. The proof relies on the construction of suitable upper and lower solutions.
Wang, Shu, Deng, Jucheng, Shi, Jine
openaire   +2 more sources

Classically integrable boundary conditions for symmetric-space sigma models [PDF]

, 2004
We investigate boundary conditions for the nonlinear sigma model on the compact symmetric space $G/H$, where $H \subset G$ is the subgroup fixed by an involution $\sigma$ of $G$.
C.A.S. Young, Corrigan, Delius, Eichenherr, Eichenherr, Eichenherr, Evans, Forger, Ghoshal, He, MacKay, MacKay, Moriconi, Moriconi, N.J. MacKay   +14 more
core   +2 more sources

On parametrized problems with non-linear boundary conditions

Electronic Journal of Qualitative Theory of Differential Equations, 2004
We consider a parametrized boundary-value problem containing an unknown parameter both in the non-linear ordinary differential equations and in the non-linear boundary conditions. By using a suitable change of variables, we reduce the original problem to
Miklós Rontó, Nataliya Shchobak
doaj   +1 more source

Existence and uniqueness of solutions for a class of higher-order fractional boundary value problems with the nonlinear term satisfying some inequalities

Journal of Inequalities and Applications, 2020
This paper focuses on a class of hider-order nonlinear fractional boundary value problems. The boundary conditions contain Riemann–Stieltjes integral and nonlocal multipoint boundary conditions.
Fang Wang, Lishan Liu, Yonghong Wu
doaj   +1 more source

New results and applications on the existence results for nonlinear coupled systems

Advances in Difference Equations, 2021
In this manuscript, we study a certain classical second-order fully nonlinear coupled system with generalized nonlinear coupled boundary conditions satisfying the monotone assumptions.
Imran Talib, Thabet Abdeljawad, Manar A. Alqudah, Cemil Tunc, Rabia Ameen   +4 more
doaj   +1 more source

Absorbing boundary conditions for the Westervelt equation [PDF]

, 2014
The focus of this work is on the construction of a family of nonlinear absorbing boundary conditions for the Westervelt equation in one and two space dimensions.
A. Majda, B. Engquist, B. Engquist, B. Kaltenbacher, B. Kaltenbacher, B. Kaltenbacher, C. Clason, C. Connor, C. Le Floch, C. Le Floch, C. Simon, D. Givoli, D. Givoli, E. Bécache, G. W. Hedstrom, I. Hallaj, I. Shevchenko, J. Kohn, J. Szeftel, J. Zhang, L. Hörmander, L. Hörmander, L. Nirenberg, M. Averkiou, M. Pernot, M. W. Wong, P. J. Westervelt, R. R. Paz, S. Tsynkov, T. Ha-Duong, T. Hagstrom, T. Hughes   +31 more
core   +1 more source

Nonlinear second-order multivalued boundary value problems [PDF]

, 2003
In this paper we study nonlinear second-order differential inclusions involving the ordinary vector $p$-Laplacian, a multivalued maximal monotone operator and nonlinear multivalued boundary conditions.
Gasinski, Leszek, Papageorgiou, Nikolaos S.   +1 more
core   +2 more sources