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Inverse Spectral Theory
Complex analysis --- Ordinary differential equations --- Mathematics. --- Spectral theory (Mathematics) --- Functional analysis --- Hilbert space --- Measure theory --- Transformations (Mathematics) --- Math --- Science
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Linear systems of ordinary differential equations, with periodic and quasi-periodic coefficients
Differential equations, Linear. --- Linear systems. --- Ordinary differential equations. --- Mathematics --- Physical Sciences & Mathematics --- Calculus --- Linear differential equations --- Linear systems
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This book is devoted to the asymptotic properties of solutions of stochastic evolution equations in infinite dimensional spaces. It is divided into three parts: Markovian dynamical systems; invariant measures for stochastic evolution equations; invariant measures for specific models. The focus is on models of dynamical processes affected by white noise, which are described by partial differential equations such as the reaction-diffusion equations or Navier-Stokes equations. Besides existence and uniqueness questions, special attention is paid to the asymptotic behaviour of the solutions, to invariant measures and ergodicity. Some of the results found here are presented for the first time. For all whose research interests involve stochastic modelling, dynamical systems, or ergodic theory, this book will be an essential purchase.
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This book presents the basic concepts and recent developments of linear control problems with perturbations. The presentation concerns both continuous and discrete dynamical systems. It is self-contained and illustrated by numerous examples. From the contents: Notion of state observers Observability Observers of full-phase vectors for fully determined linear systems Functional observers for fully determined linear systems Asymptotic observers for linear systems with uncertainty Observers for bilinear and discrete systems
Control theory. --- Linear systems. --- Systems, Linear --- Differential equations, Linear --- System theory --- Dynamics --- Machine theory --- Control Theory. --- Dynamical Systems. --- State Control. --- Systems of Linear Ordinary Differential Equations.
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Significant interest in the investigation of systems with discontinuous trajectories is explained by the development of equipment in which significant role is played by impulsive control systems and impulsive computing systems. Impulsive systems are also encountered in numerous problems of natural sciences described by mathematical models with conditions reflecting the impulsive action of external forces with pulses whose duration can be neglected. Differential equations with set-valued right-hand side arise in the investigation of evolution processes in the case of measurement errors, inaccuracy or incompleteness of information, action of bounded perturbations, violation of unique solvability conditions, etc. Differential inclusions also allow one to describe the dynamics of controlled processes and are widely used in the theory of optimal control. This monograph is devoted to the investigation of impulsive differential equations with set-valued and discontinuous right-hand sides. It is intended for researchers, lecturers, postgraduate students, and students of higher schools specialized in the field of the theory of differential equations, the theory of optimal control, and their applications.
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This book aims to provide mathematical analyses of nonlinear differential equations, which have proved pivotal to understanding many phenomena in physics, chemistry and biology. Topics of focus are autocatalysis and dynamics of molecular evolution, relaxation oscillations, deterministic chaos, reaction diffusion driven chemical pattern formation, solitons and neuron dynamics. Included is a discussion of processes from the viewpoints of reversibility, reflected by conservative classical mechanics, and irreversibility introduced by the dissipative role of diffusion. Each chapter presents the su
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This refreshing, introductory textbook covers both standard techniques for solving ordinary differential equations, as well as introducing students to qualitative methods such as phase-plane analysis. The presentation is concise, informal yet rigorous; it can be used either for 1-term or 1-semester courses. Topics such as Euler's method, difference equations, the dynamics of the logistic map, and the Lorenz equations, demonstrate the vitality of the subject, and provide pointers to further study. The author also encourages a graphical approach to the equations and their solutions, and to that end the book is profusely illustrated. The files to produce the figures using MATLAB are all provided in an accompanying website. Numerous worked examples provide motivation for and illustration of key ideas and show how to make the transition from theory to practice. Exercises are also provided to test and extend understanding: solutions for these are available for teachers.
Differential equations. --- Calculus. --- Analysis (Mathematics) --- Fluxions (Mathematics) --- Infinitesimal calculus --- Limits (Mathematics) --- Mathematical analysis --- Functions --- Geometry, Infinitesimal --- 517.91 Differential equations --- Differential equations --- Ordinary differential equations
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Volterra Stieltjes-integral equations
Differential equations --- Functional analysis --- 517.91 --- 517.91 Ordinary differential equations: general theory --- Ordinary differential equations: general theory --- Integral equations. --- Équations intégrales. --- Volterra equations --- Volterra, Équations de --- Volterra equations. --- Functional analysis. --- Functional calculus --- Calculus of variations --- Functional equations --- Integral equations --- Equations, Volterra --- Volterra, Équations de --- Equations integrales lineaires
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In this book, we study theoretical and practical aspects of computing methods for mathematical modelling of nonlinear systems. A number of computing techniques are considered, such as methods of operator approximation with any given accuracy; operator interpolation techniques including a non-Lagrange interpolation; methods of system representation subject to constraints associated with concepts of causality, memory and stationarity; methods of system representation with an accuracy that is the best within a given class of models; methods of covariance matrix estimation;methods for low-rank
Forms, Quadratic. --- Differential equations, Partial. --- Calculus of variations. --- Isoperimetrical problems --- Variations, Calculus of --- Maxima and minima --- Partial differential equations --- Quadratic forms --- Diophantine analysis --- Forms, Binary --- Number theory --- Calculus of variations --- Differential equations, Partial --- Forms, Quadratic --- 517.91 --- 517.91 Ordinary differential equations: general theory --- Ordinary differential equations: general theory
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In this monograph the natural evolution operators of autonomous first-order differential equations with exponential dichotomy on an arbitrary Banach space are studied in detail. Characterizations of these so-called exponentially dichotomous operators in terms of their resolvents and additive and multiplicative perturbation results are given. The general theory of the first three chapters is then followed by applications to Wiener-Hopf factorization and Riccati equations, transport equations, diffusion equations of indefinite Sturm-Liouville type, noncausal infinite-dimensional linear continuous-time systems, and functional differential equations of mixed type.
Operator theory. --- Differential equations, Linear. --- Perturbation (Mathematics) --- Functional analysis --- Perturbation equations --- Perturbation theory --- Approximation theory --- Dynamics --- Mathematical physics --- Linear differential equations --- Linear systems --- Differential Equations. --- Operator Theory. --- Ordinary Differential Equations. --- 517.91 Differential equations --- Differential equations --- Differential equations.
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