Results 1 to 10 of about 147,119 (311)

radial: A Fortran subroutine package for the solution of the radial Schrödinger and Dirac wave equations [PDF]

open access: yesComputer Physics Communications, 2019
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
JOSÉ M Fernández-Varea   +1 more
exaly   +10 more sources

The theoretical radial stress solution and its experimental verification of expansion cement at annulus interfaces

open access: yesPetroleum Exploration and Development, 2012
To determine the initial loading state of the casing and cement sheath during cement setting, the theoretical solution of radial stresses at the annulus interfaces is derived considering volume expansion and material parameter variation.
Zhifu YANG   +3 more
doaj   +3 more sources

On the localization and numerical computation of positive radial solutions for $\phi $-Laplace equations in the annulus

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2022
The paper deals with the existence and localization of positive radial solutions for stationary partial differential equations involving a general $\phi $-Laplace operator in the annulus.
Jorge Rodríguez-López   +2 more
doaj   +1 more source

Infinitely many radial positive solutions for nonlocal problems with lack of compactness

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2021
We are concerned with the qualitative and asymptotic analysis of solutions to the nonlocal equation $$ (-\Delta)^su+V(|z|)u=Q(|z|)u^p\quad \text{in} \ \mathbb{R}^{N},$$ where $N\geq 3 ...
Fen Zhou   +2 more
doaj   +1 more source

Radially Symmetric Solutions of [PDF]

open access: yesInternational Journal of Differential Equations, 2012
We investigate solutions of and focus on the regime and . Our advance is to develop a technique to efficiently classify the behavior of solutions on , their maximal positive interval of existence. Our approach is to transform the nonautonomous equation into an autonomous ODE.
Troy, William C., Krisner, Edward P.
openaire   +2 more sources

A minimal solution to the autocalibration of radial distortion [PDF]

open access: yes2007 IEEE Conference on Computer Vision and Pattern Recognition, 2007
Epipolar geometry and relative camera pose computation are examples of tasks which can be formulated as minimal problems and solved from a minimal number of image points. Finding the solution leads to solving systems of algebraic equations. Often, these systems are not trivial and therefore special algorithms have to be designed to achieve numerical ...
Zuzana Kukelova, Tomás Pajdla
openaire   +1 more source

The Existence of Radial Solutions to the Schrödinger System Containing a Nonlinear Operator

open access: yesAxioms, 2022
In this paper, we investigate a class of nonlinear Schrödinger systems containing a nonlinear operator under Osgood-type conditions. By employing the iterative technique, the existence conditions for entire positive radial solutions of the above problem ...
Guotao Wang, Zhuobin Zhang, Zedong Yang
doaj   +1 more source

On Radial Solutions of the Schrödinger Type Equation

open access: yesAdvanced Nonlinear Studies, 2011
Abstract We establish compact embeddings of the radial Sobolev space H rad 1,p (ℝ N ) into weighted Lebesgue spaces L q w (ℝ N
Chabrowski, Jan H., Grotowski, Joseph F.
openaire   +3 more sources

Uniqueness of Radial Solutions for the Fractional Laplacian [PDF]

open access: yesCommunications on Pure and Applied Mathematics, 2015
AbstractWe prove general uniqueness results for radial solutions of linear and nonlinear equations involving the fractional Laplacian (−Δ)s with s ∊ (0,1) for any space dimensions N ≥ 1. By extending a monotonicity formula found by Cabré and Sire , we show that the linear equation urn:x-wiley:00103640:media:cpa21591:cpa21591-math-0001 has at most one
Frank, Rupert L.   +2 more
openaire   +5 more sources

Glueballs—a radial solution?

open access: yesPhysics Letters B, 1983
Abstract We analyze the mass spectrum and radiative decays of the low lying pseudoscalar and vector mesons in a nonrelativistic model. We investigate the mixing of the gluonium candidate ι(1440) with the J PC = 0 −+ quarkonium candidates. The light quark content of these states as well as implications of the mixing is discussed.
Mariana Frank, Patrick J. O'Donnell
openaire   +1 more source

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