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Author: Miguel Ángel Herrero Publisher: Elsevier Masson ISBN: Category : Mathematics Languages : en Pages : 166
Book Description
This is an up-to-date survey of current research with partial differential equations. Topics discussed include the evolution of hypersurfaces by mean curvature flow, nonlinear wave equations including harmonic maps, and blow-up mechanisms for semilinear parabolic equations.
Author: Miguel Ángel Herrero Publisher: Elsevier Masson ISBN: Category : Mathematics Languages : en Pages : 166
Book Description
This is an up-to-date survey of current research with partial differential equations. Topics discussed include the evolution of hypersurfaces by mean curvature flow, nonlinear wave equations including harmonic maps, and blow-up mechanisms for semilinear parabolic equations.
Author: Pierre Magal Publisher: American Mathematical Soc. ISBN: 0821846531 Category : Bifurcation theory Languages : en Pages : 84
Book Description
Several types of differential equations, such as delay differential equations, age-structure models in population dynamics, evolution equations with boundary conditions, can be written as semilinear Cauchy problems with an operator which is not densely defined in its domain. The goal of this paper is to develop a center manifold theory for semilinear Cauchy problems with non-dense domain. Using Liapunov-Perron method and following the techniques of Vanderbauwhede et al. in treating infinite dimensional systems, the authors study the existence and smoothness of center manifolds for semilinear Cauchy problems with non-dense domain. As an application, they use the center manifold theorem to establish a Hopf bifurcation theorem for age structured models.
Author: Mariana Haragus Publisher: Springer Science & Business Media ISBN: 0857291122 Category : Mathematics Languages : en Pages : 338
Book Description
An extension of different lectures given by the authors, Local Bifurcations, Center Manifolds, and Normal Forms in Infinite Dimensional Dynamical Systems provides the reader with a comprehensive overview of these topics. Starting with the simplest bifurcation problems arising for ordinary differential equations in one- and two-dimensions, this book describes several tools from the theory of infinite dimensional dynamical systems, allowing the reader to treat more complicated bifurcation problems, such as bifurcations arising in partial differential equations. Attention is restricted to the study of local bifurcations with a focus upon the center manifold reduction and the normal form theory; two methods that have been widely used during the last decades. Through use of step-by-step examples and exercises, a number of possible applications are illustrated, and allow the less familiar reader to use this reduction method by checking some clear assumptions. Written by recognised experts in the field of center manifold and normal form theory this book provides a much-needed graduate level text on bifurcation theory, center manifolds and normal form theory. It will appeal to graduate students and researchers working in dynamical system theory.
Author: Charles Collot Publisher: American Mathematical Soc. ISBN: 147042813X Category : Manifolds (Mathematics) Languages : en Pages : 163
Book Description
Our analysis adapts the robust energy method developed for the study of energy critical bubbles by Merle-Rapha¨el-Rodnianski, Rapha¨el-Rodnianski and Rapha¨el- Schweyer, the study of this issue for the supercritical semilinear heat equation done by Herrero-Vel´azquez, Matano-Merle and Mizoguchi, and the analogous result for the energy supercritical Schr¨odinger equation by Merle-Rapha¨el-Rodnianski.
Author: L.A. Peletier Publisher: Springer Science & Business Media ISBN: 1461201357 Category : Mathematics Languages : en Pages : 347
Book Description
The study of spatial patterns in extended systems, and their evolution with time, poses challenging questions for physicists and mathematicians alike. Waves on water, pulses in optical fibers, periodic structures in alloys, folds in rock formations, and cloud patterns in the sky: patterns are omnipresent in the world around us. Their variety and complexity make them a rich area of study. In the study of these phenomena an important role is played by well-chosen model equations, which are often simpler than the full equations describing the physical or biological system, but still capture its essential features. Through a thorough analysis of these model equations one hopes to glean a better under standing of the underlying mechanisms that are responsible for the formation and evolution of complex patterns. Classical model equations have typically been second-order partial differential equations. As an example we mention the widely studied Fisher-Kolmogorov or Allen-Cahn equation, originally proposed in 1937 as a model for the interaction of dispersal and fitness in biological populations. As another example we mention the Burgers equation, proposed in 1939 to study the interaction of diffusion and nonlinear convection in an attempt to understand the phenomenon of turbulence. Both of these are nonlinear second-order diffusion equations.
Author: Pavol Quittner Publisher: Springer Science & Business Media ISBN: 3764384425 Category : Mathematics Languages : en Pages : 584
Book Description
This book is devoted to the qualitative study of solutions of superlinear elliptic and parabolic partial differential equations and systems. This class of problems contains, in particular, a number of reaction-diffusion systems which arise in various mathematical models, especially in chemistry, physics and biology. The book is self-contained and up-to-date, taking special care on the didactical preparation of the material. It is devoted to problems that are intensively studied but have not been treated thus far in depth in the book literature.
Author: Juan Luis Vazquez Publisher: Oxford University Press on Demand ISBN: 0198569033 Category : Mathematics Languages : en Pages : 647
Book Description
Aimed at research students and academics in mathematics and engineering, as well as engineering specialists, this book provides a systematic and comprehensive presentation of the mathematical theory of the nonlinear heat equation usually called the Porous Medium Equation.
Author: Charles Collot Publisher: American Mathematical Soc. ISBN: 1470436264 Category : Languages : en Pages : 93
Book Description
The authors consider the energy super critical semilinear heat equation The authors first revisit the construction of radially symmetric self similar solutions performed through an ode approach and propose a bifurcation type argument which allows for a sharp control of the spectrum of the corresponding linearized operator in suitable weighted spaces. They then show how the sole knowledge of this spectral gap in weighted spaces implies the finite codimensional nonradial stability of these solutions for smooth well localized initial data using energy bounds. The whole scheme draws a route map for the derivation of the existence and stability of self-similar blow up in nonradial energy super critical settings.
Author: Miguel Ángel Herrero
Author: Miguel Ángel Herrero
Author: 
Author: 
Author: Pierre Magal
Author: Mariana Haragus
Author: Charles Collot
Author: L.A. Peletier
Author: Pavol Quittner
Author: Juan Luis Vazquez
Author: Charles Collot