Results 21 to 30 of about 341,746 (252)

Eulerian and Lagrangian solutions to the continuity and Euler equations with $L^1$ vorticity [PDF]

open access: yes, 2017
In the first part of this paper we establish a uniqueness result for continuity equations with velocity field whose derivative can be represented by a singular integral operator of an $L^1$ function, extending the Lagrangian theory in \cite ...
Crippa, Gianluca   +3 more
core   +2 more sources

Representation and stability of solutions of systems of functional differential equations with multiple delays

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2012
This paper is devoted to the study of systems of nonlinear functional differential equations with time-dependent coefficients and multiple variable increasing delays represented by functions $g_i(t)
Michal Pospíšil
doaj   +1 more source

Stability and existence of multiperiodic solutions for second-order linear equations with a diagonal differentiation operator

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы
The stability of differential equations with periodic and quasiperiodic coefficients is a central topic in modern stability theory, with important applications in mechanics, physics, and dynamical systems. A classical result in this area is the Lyapunov
G.M. Aitenova   +3 more
doaj   +1 more source

On Ulam Stability and Multiplicity Results to a Nonlinear Coupled System with Integral Boundary Conditions

open access: yesMathematics, 2019
This manuscript is devoted to establishing existence theory of solutions to a nonlinear coupled system of fractional order differential equations (FODEs) under integral boundary conditions (IBCs).
Kamal Shah, Poom Kumam, Inam Ullah
doaj   +1 more source

The energy and stability of D-term strings [PDF]

open access: yes, 2006
Cosmic strings derived from string theory, supergravity or any theory of choice should be stable if we hope to observe them. In this paper we consider D-term strings in D=4, N=1 supergravity with a constant Fayet-Iliopoulos term.
A. Achucarro   +17 more
core   +2 more sources

Existence and Stability for a Nonlinear Coupled p-Laplacian System of Fractional Differential Equations

open access: yesJournal of Mathematics, 2021
In this paper, we study the nonlinear coupled system of equations with fractional integral boundary conditions involving the Caputo fractional derivative of orders θ1 and θ2 and Riemann–Liouville derivative of orders ϱ1 and ϱ2 with the p-Laplacian ...
Merfat Basha   +2 more
doaj   +1 more source

Classical and quantum stability of higher-derivative dynamics [PDF]

open access: yes, 2014
We observe that a wide class of higher-derivative systems admits a bounded integral of motion that ensures the classical stability of dynamics, while the canonical energy is unbounded.
Kaparulin, D. S.   +2 more
core   +1 more source

Existence and exponential stability in the pth moment for impulsive neutral stochastic integro-differential equations driven by mixed fractional Brownian motion

open access: yesJournal of Inequalities and Applications, 2019
This paper consider the existence, uniqueness and exponential stability in the pth moment of mild solution for impulsive neutral stochastic integro-differential equations driven simultaneously by fractional Brownian motion and by standard Brownian motion.
Xia Zhou, Dongpeng Zhou, Shouming Zhong
doaj   +1 more source

Interaction Between Convection and Pulsation [PDF]

open access: yes, 2015
This article reviews our current understanding of modelling convection dynamics in stars. Several semi-analytical time-dependent convection models have been proposed for pulsating one-dimensional stellar structures with different formulations for how the
A Baglin   +273 more
core   +4 more sources

Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation

open access: yesFEBS Letters, EarlyView.
Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe   +3 more
wiley   +1 more source

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