Results 41 to 50 of about 68,019 (304)

Ordinary Differential Equation with Left and Right Fractional Derivatives and Modeling of Oscillatory Systems

open access: yesMathematics, 2020
We consider the principle of least action in the context of fractional calculus. Namely, we derive the fractional Euler–Lagrange equation and the general equation of motion with the composition of the left and right fractional derivatives defined on ...
Liana Eneeva   +2 more
doaj   +1 more source

Nonlinear Schrödinger equations with potentials vanishing at infinity [PDF]

open access: yesComptes Rendus. Mathématique, 2006
In this Note, we deal with stationary nonlinear Schrödinger equations of the form − ε 2 Δ u + V
Bonheure, Denis, Van Schaftingen, Jean
openaire   +2 more sources

Asymptotically linear Schrödinger equation with potential vanishing at infinity

open access: yes, 2008
We are concerned with the existence of bound states and ground states of the following nonlinear Schrödinger equation(0.1){−Δu(x)+V(x)u(x)=K(x)f(u),x∈RN,u∈H1(RN),u(x)>0,N⩾3, where the potential V(x) may vanish at infinity, f(s) is asymptotically linear ...
Zhengping Wang   +5 more
core   +1 more source

Dialectical Infinity and the Third Mathematical Crisis —On the Fundamental Error of Actual Infinity

open access: yes, 2020
This paper discusses the problem of finity and infinity based on the philosophical perspectives of opposing idealism and receiving dialectical materialism.
Hong, Zhang
core   +1 more source

Vestibular Patient Journey: Insights From Vestibular Disorders Association (VeDA) Registry

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Vestibular symptoms impose a high burden of disability. Understanding real‐world diagnostic and treatment pathways can identify care gaps and guide interventions. We aimed to characterize symptom profiles, diagnostic trends, provider involvement, and treatment patterns in vestibular disorders.
Ali Rafati   +10 more
wiley   +1 more source

On the solvability of a higher-order semilinear ODE

open access: yesElectronic Journal of Qualitative Theory of Differential Equations
The existence of at least one or two nontrivial solutions to a general higher-order boundary value problem is established by using variational tools. Two of the results are obtained without any asymptotic behaviour at infinity of potential $F$ of the ...
Cristian-Paul Danet
doaj   +1 more source

An Infinity Tube with an Expansion Chamber for Noise Control in the Ductwork System

open access: yesSensors, 2022
This paper proposes a muffler with simple geometry to effectively reduce low-frequency noise in ductwork systems. A muffler named infinity tube with an expansion chamber (ITEC) is developed from the infinity tube (IT).
Rong Xue   +3 more
doaj   +1 more source

A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems

open access: yesInternational Journal of Adaptive Control and Signal Processing, Volume 39, Issue 3, Page 566-581, March 2025.
A Q‐learning algorithm to solve the two‐player zero‐sum game problem for nonlinear systems. ABSTRACT This paper deals with the two‐player zero‐sum game problem, which is a bounded L2$$ {L}_2 $$‐gain robust control problem. Finding an analytical solution to the complex Hamilton‐Jacobi‐Issacs (HJI) equation is a challenging task.
Afreen Islam   +2 more
wiley   +1 more source

Nieskończoność w matematyce. Zmagania z potrzebnym, acz kłopotliwym pojęciem

open access: yesZagadnienia Filozoficzne w Nauce, 2014
Infinity has appeared in mathematics since the very beginning. Moreover the mathematical concept of infinity was and is connected with philosophical and theological concepts.
Roman Murawski
doaj  

3. Historical views of infinity

open access: yes, 2017
‘Historical views of infinity’ focuses on historical attitudes to infinity in philosophy, religion, and mathematics, including Zeno’s famous paradoxes. Infinity is not a thing, but a concept, related to the default workings of the human mind.
Ian Stewart
core   +1 more source

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