Results 11 to 20 of about 456,102 (333)

Explicit and exact travelling wave solutions for Hirota equation and computerized mechanization. [PDF]

open access: yesPLoS ONE
By using the power-exponential function method and the extended hyperbolic auxiliary equation method, we present the explicit solutions of the subsidiary elliptic-like equation.
Bacui Li, Fuzhang Wang, Sohail Nadeem
doaj   +2 more sources

Image quality comparisons of coil setups in 3T MRI for brain and head and neck radiotherapy simulations

open access: yesJournal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract Purpose MRI is increasingly used for brain and head and neck radiotherapy treatment planning due to its superior soft tissue contrast. Flexible array coils can be arranged to encompass treatment immobilization devices, which do not fit in diagnostic head/neck coils. Selecting a flexible coil arrangement to replace a diagnostic coil should rely
Evangelia Kaza   +6 more
wiley   +1 more source

A guide to the design of the virtual element methods for second- and fourth-order partial differential equations

open access: yesMathematics in Engineering, 2023
We discuss the design and implementation details of two conforming virtual element methods for the numerical approximation of two partial differential equations that emerge in phase-field modeling of fracture propagation in elastic material.
Yu Leng   +6 more
doaj   +1 more source

Hopscotch methods for elliptic partial differential equations

open access: yesJournal of Computational and Applied Mathematics, 1979
AbstractThis paper analyses hopscotch algorithms when used to solve elliptic partial differential equations. A comparison with standard methods is made for the model problem.
Sean McKee, A.R. Gourlay
openaire   +2 more sources

Fredholmness of an abstract differential equation of elliptic type

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2004
In this work, we obtain algebraic conditions which assure the Fredholm solvability of an abstract differential equation of elliptic type. In this respect, our work can be considered as an extension of Yakubov's results to the case of boundary conditions ...
A. Aibeche
doaj   +1 more source

Diffusion Coefficients Estimation for Elliptic Partial Differential Equations [PDF]

open access: yesSIAM Journal on Mathematical Analysis, 2017
25 ...
Bonito, Andrea   +4 more
openaire   +6 more sources

The Continuous Classical Boundary Optimal Control of a Couple Nonlinear Elliptic Partial Differential Equations with State Constraints

open access: yesAl-Mustansiriyah Journal of Science, 2019
This paper is concerned with, the proof of the existence and the uniqueness theorem for the solution of the state vector of a couple of nonlinear elliptic partial differential equations using the Minty-Browder theorem, where the continuous classical ...
Jamil Amir Al-hawasy   +1 more
doaj   +1 more source

An efficient method for 3D Helmholtz equation with complex solution

open access: yesAIMS Mathematics, 2023
The Helmholtz equation as an elliptic partial differential equation possesses many applications in the time-harmonic wave propagation phenomena, such as the acoustic cavity and radiation wave.
M. H. Heydari   +2 more
doaj   +1 more source

On Uniqueness of Boundary Blow-up Solutions of a Class of Nonlinear Elliptic Equations [PDF]

open access: yesComm. Partial Differential Equations 33 (2008), no. 2, pp. 177-188, 2007
We study boundary blow-up solutions of semilinear elliptic equations $Lu=u_+^p$ with $p>1$, or $Lu=e^{au}$ with $a>0$, where $L$ is a second order elliptic operator with measurable coefficients. Several uniqueness theorems and an existence theorem are obtained.
arxiv   +1 more source

An inverse problem for an elliptic partial differential equation

open access: yesJournal of Mathematical Analysis and Applications, 1987
AbstractWe demonstrate uniqueness and local existence of the unknown coefficient a = a(x) in the elliptic equation Δu − a(x) u = 0 in the quarter plane x > 0, y > 0 which is subject to the boundary conditions u(0, y) = ƒ(y), ux(0, y) = g(y), and u(x, 0) = h(x).
John R. Cannon, William Rundell
openaire   +2 more sources

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