Results 41 to 50 of about 1,310,010 (183)

Existence and multiplicity of solutions for a class of ( p , q ) $(p,q)$ -Kirchhoff system with combined nonlinearities on graphs

Boundary Value Problems
By using the well-known mountain-pass theorem and Ekeland’s variational principle, we prove that there exist at least two fully nontrivial solutions for a ( p , q ) $(p,q)$ -Kirchhoff elliptic system with the Dirichlet boundary conditions and ...
Zhangyi Yu, Junping Xie, Xingyong Zhang
doaj   +1 more source

Evolution of axial gravitational waves in rainbow universe

Physics Letters B, 2022
In view of the Regge-Wheeler formalism (RWF) causing axial and polar gravitational waves (GWs), axial modes of the GWs are investigated by considering the spatially flat conformal Friedmann-Lemaitre-Robertson-Walker (FLRW) metric in the rainbow gravity ...
O. Aydogdu, M. Salti
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Approximate Conservation Laws of Nonvariational Differential Equations

Mathematics, 2019
The concept of an approximate multiplier (integrating factor) is introduced. Such multipliers are shown to give rise to approximate local conservation laws for differential equations that admit a small perturbation.
Sameerah Jamal
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New analytical solution for stream–aquifer interaction under constant replenishment

Applied Water Science, 2018
In the present paper, approximate analytical solutions for flow in unconfined aquifers with streams are obtained assuming one-dimensional horizontal groundwater flow in homogeneous and isotropic aquifer with recharge effect using variational homotopy ...
Amruta Daga Bhandari, V. H. Pradhan, Rajeev K. Bansal   +2 more
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Limiting absorption principle for perturbed operator

, 2021
4 pages; an invariant operator ideal version of the main result has been ...
openaire   +2 more sources

Perturbation theory for critical points of causal variational principles [PDF]

Advances in Theoretical and Mathematical Physics, 2020
The perturbation theory for critical points of causal variational principles is developed. We first analyze the class of perturbations obtained by multiplying the universal measure by a weight function and taking the push-forward under a diffeomorphism. Then the constructions are extended to convex combinations of such measures, leading to perturbation
openaire   +2 more sources

Size-dependent mechanics of viscoelastic carbon nanotubes: Modeling, theoretical and numerical analysis

Results in Physics, 2020
This research presents the complex mechanics of the size-dependent viscoelastic carbon nanotube (CNT) subjected to the electric load. The mechanical model describing the motions of CNT is formulated by the Euler beam theory, Kelvin-Voigt viscoelastic ...
Mingyuan Li, Qiliang Wu, Bin Bai
doaj   +1 more source

Numerical study of the applicability of the Saint-Venant principle

MATEC Web of Conferences, 2017
The limits of the applicability of the Saint-Venant principle are investigated while using the LIRA-CAD app. A large number of bars loaded at the end with different loads are considered.
Paushkin Alexander, Saiyan Sergey
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REGULARIZATION OF PONTRYAGIN MAXIMUM PRINCIPLE IN OPTIMAL CONTROL OF DISTRIBUTED SYSTEMS

Ural Mathematical Journal, 2016
This article is devoted to studying dual regularization method applied to parametric convex optimal control problem of controlled third boundary–value problem for parabolic equation with boundary control and with equality and inequality pointwise state ...
Mikhail I. Sumin
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Testing the Cosmological Principle in an Axisymmetric Metric from Ia SNe and CMB

Universe
We investigate the possibility of testing the Cosmological Principle within a specific axisymmetric metric. Starting from the Einstein field equations, we derive a perturbed form of the Friedmann equation based on this metric and obtain a generalized ...
Shuangnan Chen, Xiaofeng Yang, Yunliang Ren, Sufen Guo   +3 more
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