Results 31 to 40 of about 6,950 (285)

A general blow-up result for a degenerate hyperbolic inequality in an exterior domain

Bulletin of Mathematical Sciences, 2023
In this paper, we consider a degenerate hyperbolic inequality in an exterior domain under three types of boundary conditions: Dirichlet-type, Neumann-type, and Robin-type boundary conditions.
Mohamed Jleli, Mokhtar Kirane, Bessem Samet   +2 more
doaj   +1 more source

An inverse three spectra problem for Sturm–Liouville operators

Boundary Value Problems, 2018
In this paper, we consider the inverse three spectra problems of recovering the Sturm–Liouville equation by the spectra of the Neumann–Dirichlet boundary value problem on [0,1] $[0,1]$, the Neumann–Robin problem on [0,1/2] $[0,1/2]$, and the Robin ...
Yongxia Guo, Guangsheng Wei, Ruoxia Yao
doaj   +1 more source

Thin waveguides with Robin boundary conditions [PDF]

Journal of Mathematical Physics, 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 Dirichlet condition case [G. Bouchitté, M. L. Mascarenhas, and L.
Bouchitté, Guy, Mascarenhas, Luísa, Trabucho, Luís   +2 more
openaire   +2 more sources

Direct Integration of Boundary Value Problems Using the Block Method via the Shooting Technique Combined with Steffensen’s Strategy

Mathematics, 2019
This study is intended to evaluate numerically the solution of second order boundary value problems (BVPs) subject to mixed boundary conditions using a direct method.
Nadirah Mohd Nasir, Zanariah Abdul Majid, Fudziah Ismail, Norfifah Bachok   +3 more
doaj   +1 more source

Temperature on rods with Robin boundary conditions

Journal of Mathematical Analysis and Applications, 2023
We consider solutions $u_f$ to the one-dimensional Robin problem with the heat source $f\in L^1[-π,π]$ and Robin parameter $α>0$.
Betsakos, Dimitrios, Solynin, Alexander
openaire   +3 more sources

Hardy inequalities for p-Laplacians with Robin boundary conditions [PDF]

, 2015
In this paper we study the best constant in a Hardy inequality for the p-Laplace operator on convex domains with Robin boundary conditions. We show, in particular, that the best constant equals ((p−1)/p)p whenever Dirichlet boundary conditions are ...
Ekholm, Tomas, Laptev, Ari, Ekholm, T, Kovarik, H, Laptev, A, KOVARIK, HYNEK   +5 more
core   +1 more source

An Influence of the Wall Acoustic Impedance on the Room Acoustics. The Exact Solution

Archives of Acoustics, 2017
The Fourier method is applied to the description of the room acoustics field with the combination of uniform impedance boundary conditions imposed on some walls.
Adam BRAŃSKI, Anna KOCAN-KRAWCZYK, Edyta PRĘDKA   +2 more
doaj   +1 more source

Characterization of the Mean First-Passage Time Function Subject to Advection in Annular-like Domains

Mathematics, 2023
Cell migration in a biological medium towards a blood vessel is modeled, as a random process, sucessively inside an annulus (two-dimensional domain) and an annular cylinder (three-dimensional domain).
Hélia Serrano, Ramón F. Álvarez-Estrada   +1 more
doaj   +1 more source

Stability for the Determination of Unknown Boundary and Impedance with a Robin Boundary Condition [PDF]

SIAM Journal on Mathematical Analysis, 2010
We consider an inverse problem arising in corrosion detection. We prove a stability result of logarithmic type for the determination of the corroded portion of the boundary and impedance by two measurements on the accessible portion of the boundary.
openaire   +3 more sources

Initial and boundary value problems in two and three dimensions [PDF]

, 2010
This thesis: (a) presents the solution of several boundary value problems (BVPs) for the Laplace and the modified Helmholtz equations in the interior of an equilateral triangle; (b) presents the solution of the heat equation in the interior of an ...

core   +2 more sources