توضیحات
This work focuses on the preservation of attractors and saddle points of ordinary differential equations under discretisation. In the 1980s, key results for autonomous ordinary differential equations were obtained by Beyn for saddle points and by Kloeden & Lorenz for attractors. One-step numerical schemes with a constant step size were considered, so the resulting discrete time dynamical system was also autonomous. One of the aims of this book is to present new findings on the discretisation of dissipative nonautonomous dynamical systems that have been obtained in recent years, and in particular to examine the properties of nonautonomous omega limit sets and their approximations by numerical schemes results that are also of importance for autonomous systems approximated by a numerical scheme with variable time steps, thus by a discrete time nonautonomous dynamical system. Read more…
Abstract: This work focuses on the preservation of attractors and saddle points of ordinary differential equations under discretisation. In the 1980s, key results for autonomous ordinary differential equations were obtained by Beyn for saddle points and by Kloeden & Lorenz for attractors. One-step numerical schemes with a constant step size were considered, so the resulting discrete time dynamical system was also autonomous. One of the aims of this book is to present new findings on the discretisation of dissipative nonautonomous dynamical systems that have been obtained in recent years, and in particular to examine the properties of nonautonomous omega limit sets and their approximations by numerical schemes results that are also of importance for autonomous systems approximated by a numerical scheme with variable time steps, thus by a discrete time nonautonomous dynamical system
این کار بر حفظ جاذبهها و نقاط زین معادلات دیفرانسیل معمولی تحت گسسته تمرکز دارد. در دهه 1980، نتایج کلیدی برای معادلات دیفرانسیل معمولی خودمختار توسط Beyn برای نقاط زینی و توسط Kloeden & Lorenz برای جاذبهها بهدست آمد. طرحهای عددی یکمرحلهای با اندازه گام ثابت در نظر گرفته شد، بنابراین سیستم دینامیکی زمان گسسته حاصل نیز مستقل بود. یکی از اهداف این کتاب ارائه یافتههای جدید در مورد گسستهسازی سیستمهای دینامیکی غیرخودکار اتلافپذیر است که در سالهای اخیر بهدست آمدهاند، و بهویژه بررسی ویژگیهای مجموعههای حد امگا غیرمستقل و تقریب آنها با نتایج طرحهای عددی است. برای سیستمهای خودمختار که توسط یک طرح عددی با مراحل زمانی متغیر تقریب میشوند، بنابراین توسط یک سیستم دینامیکی غیرمستقل زمان گسسته، اهمیت دارد. بیشتر بخوانید…< /span>
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