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Preface Issue 2-2014

机译:前言第2-2014期

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摘要

Most mathematicians have at least a basic knowledge of ordinary differential equations but I am rather sure that a lot of them including those, who work on differential equations, have not thought about delay differential equations, yet. At the same time there are many obvious examples of applications, where it takes some time for the state of a system to gain influence on its rate of change. Hans-Otto Walther begins his survey on "Topics in Delay Differential Equations" with the simple looking example x'(t) = -αx(t - 1) and its variants to explain the most striking differences between differential equations with or without delay. After explaining a number of further examples and giving a brief overview of the basic theory the survey puts some emphasis on the dynamical behaviour of scalar equations with constant delay as well as on equations with state-dependent delay.
机译:大多数数学家至少具有常微分方程的基本知识,但是我相当确定,其中包括从事微分方程的那些在内的许多数学家尚未考虑过延迟微分方程。同时,有许多明显的应用示例,其中系统状态要花一些时间才能对其变化率产生影响。汉斯·奥托·沃尔瑟(Hans-Otto Walther)通过简单的示例x'(t)=-αx(t-1)及其变体来开始研究“延迟微分方程的主题”,以解释带或不带延迟的微分方程之间最显着的差异。在解释了许多其他示例并简要介绍了基本理论之后,本次调查将重点放在具有恒定延迟的标量方程的动力学行为以及与状态相关的延迟的方程上。

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