Results 31 to 40 of about 2,816,497 (287)

Risking your NEC

Journal of High Energy Physics, 2021
Energy conditions, especially the null energy condition (NEC), are generically imposed on solutions to retain a physically sensible classical field theory and they also play an important role in the AdS/CFT duality.
Carlos Hoyos, Niko Jokela, José Manuel Penín, Alfonso V. Ramallo, Javier Tarrío   +4 more
doaj   +1 more source

Monotone approximations of unstable solutions

Journal of Computational and Applied Mathematics, 2001
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +1 more source

Traveling Wave Solutions in a Reaction-Diffusion Epidemic Model

Abstract and Applied Analysis, 2013
We investigate the traveling wave solutions in a reaction-diffusion epidemic model. The existence of the wave solutions is derived through monotone iteration of a pair of classical upper and lower solutions.
Sheng Wang, Wenbin Liu, Zhengguang Guo, Weiming Wang   +3 more
doaj   +1 more source

On alternating and bounded solutions of one class of integral equations on the entire axis with monotonic nonlinearity

Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2020
The paper is devoted to the study of the existence and analysis of the qualitative properties of solutions for one class of integral equations with monotonic nonlinearity on the entire line.
Khachatur Aghavardovich Khachatryan, Haykanush Samvelovna Petrosyan   +1 more
doaj   +1 more source

New Monotonic Properties of Positive Solutions of Higher-Order Delay Differential Equations and Their Applications

Mathematics, 2022
In this work, new criteria were established for testing the oscillatory behavior of solutions of a class of even-order delay differential equations. We follow an approach that depends on obtaining new monotonic properties for the decreasing positive ...
Ali Muhib, Osama Moaaz, Clemente Cesarano, Shami A. M. Alsallami, Sayed Abdel-Khalek, Abd Elmotaleb A. M. A. Elamin   +5 more
doaj   +1 more source

Monotonic solution of the translation equation [PDF]

Annales Polonici Mathematici, 1983
The translation equation \[ (1)\quad F(F(x,\alpha),\beta)=F(x,\beta \alpha) \] is considered for F:\(X\to G\) (linearly ordered: the set X and the group G) satisfying further \(F(x,1)=x\) for \(x\in X\). The main result reads: Every transitive (i.e.
Gregorczyk, A., Tabor, J.
openaire   +2 more sources

Monotonic properties of Kneser solutions of second order linear differential equations with delayed argument [PDF]

Opuscula Mathematica
In this paper new monotonic properties of nonoscillatory solutions for second order linear functional differential equations with delayed argument \[y{''}(t)=p(t)y(\tau(t))\] have been established.
Blanka Baculíková
doaj   +1 more source

Properties of solutions to a second order nonlinear differential equation

International Journal of Mathematics and Mathematical Sciences, 1990
In this note, we show when all solutions to the nonlinear differential equation x″+c(t)f(x)g(x′)x′+a(t,x)=0 are bounded. Furthermore, the solutions are either oscillatory or monotonic and asymptotically stable.
Allan J. Kroopnick
doaj   +1 more source

Quantifying non-monotonicity of functions and the lack of positivity in signed measures

Modern Stochastics: Theory and Applications, 2017
In various research areas related to decision making, problems and their solutions frequently rely on certain functions being monotonic. In the case of non-monotonic functions, one would then wish to quantify their lack of monotonicity.
Youri Davydov, Ričardas Zitikis
doaj   +1 more source

Evaluation of Digital Technologies for Home‐Based Assessment in People With Amyotrophic Lateral Sclerosis

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Digital technologies hold promise for transforming healthcare by enhancing personalized treatments and offer valuable opportunities to improve patient care. Here, we evaluated several novel, self‐administered, home‐based, digital endpoints for their association with corresponding conventional standard clinical measures (primary) in ...
Arne Mueller, Vanessa Vallejo, Mónica Povedano Panadés, Orla Hardiman, Véronique Danel‐Brunaud, Senda Ajroud‐Driss, Philippe Couratier, Jeremy Shefner, Anna Gokey, Mike DiCesare, Erin Lennox, Jens Praestgaard, Lucie Brujin, Peggy Allred, Ram Miller   +14 more
wiley   +1 more source