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Geometry, Differential

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The book presents the theory of diffusion-reaction equations starting from the Volterra-Lotka systems developed in the eighties for Dirichlet boundary conditions. It uses the analysis of applicable systems of partial differential equations as a starting point for studying upper-lower solutions, bifurcation, degree theory and other nonlinear methods. It also illustrates the use of semigroup, stability theorems and W2ptheory. Introductory explanations are included in the appendices for non-expert readers. The first chapter covers a wide range of steady-state and stability results involving prey-predator, competing and cooperating species under strong or weak interactions. Many diagrams are included to easily understand the description of the range of parameters for coexistence. The book provides a comprehensive presentation of topics developed by numerous researchers. Large complex systems are introduced for modern research in ecology, medicine and engineering. Chapter 3 combines the theories of earlier chapters with the optimal control of systems involving resource management and fission reactors. This is the first book to present such topics at research level. Chapter 4 considers persistence, cross-diffusion, and boundary induced blow-up, etc. The book also covers traveling or systems of waves, coupled Navier-Stokes and Maxwell systems, and fluid equations of plasma display. These should be of interest to life and physical scientists.

Differential equations, Partial. --- Differential equations, Nonlinear.

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This concise book covers the classical tools of PDE theory used in today's science and engineering: characteristics, the wave propagation, the Fourier method, distributions, Sobolev spaces, fundamental solutions, and Green's functions. The approach is problem-oriented, giving the reader an opportunity to master solution techniques. The theoretical part is rigorous and with important details presented with care. Hints are provided to help the reader restore the arguments to their full rigor. Many examples from physics are intended to keep the book intuitive and to illustrate the applied nature of the subject. The book is useful for a higher-level undergraduate course and for self-study.

Partial differential equations --- differentiaalvergelijkingen

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Cet ouvrage est consacré à une introduction aux problèmes inverses elliptiques et paraboliques. L' objectif est de présenter quelques méthodes récentes pour établir des résultats d'unicité et de stabilité. Seront traités quelques problèmes inverses elliptiques devenus maintenant classiques, tels que la conductivité inverse, la détection de corrosion ou de fissures et les problèmes spectraux inverses. Parmi les problèmes inverses paraboliques considérés figurent le problème classique de retrouver une distribution initiale de la chaleur et la localisation de sources, de chaleur ou de pollution par exemple. Les problèmes d'identification de non linéarités seront aussi étudiés. Cet ouvrage s'adresse à tous ceux qui souhaitent s' intéresser à l'analyse mathématique des problèmes inverses. This volume is devoted to an introduction of elliptic and parabolic inverse problems. The goal is to present some recent methods for establishing uniqueness and stability results. A number of classical elliptic inverse problems are studied, e.g. the inverse conductivity problem, the detection of corrosion or cracks and inverse spectral problems. Among the parabolic inverse problems, the classic problem of finding an initial distribution of heat and the location of sources is considered. This volume will be of interest to all those who want to learn the mathematical analysis of inverse problems.

Partial differential equations --- differentiaalvergelijkingen

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Differential equations, Partial