非線性分?jǐn)?shù)微分方程理論（英文版）

　　Fractional order calculus is the theory of arbitrary order differential and integral， it is unified with the integer order differential and integral calcu-lus， is the development of classical calculus， fractional calculus as a descrip-tion of classical physics and related discipline theory analytic mathematical tools have been widely accepted， but when people study complex systems and complex phenomena， the classical integer order differential and integral equation description for the systems will encounter a series of problems，therefore， there is an urgent looking forward to having a kind of mathema-tical tools available and can be based on the basic principle of the complex system modeling. Fractional-order differential equations are very suitable for describing materials and processes with memory and heritability， and their description of complex systems has the advantages of simple model-ing， clear physical meaning of parameters and accurate description.In recent decades， fractional differential equations have been increasing-ly used to describe problems in optical and thermal systems， theological and material and mechanical systems， signal processing and system identi-fication， control and robotics and their applications. Fractional differentialequations have been investigated by more and more scholars from around the world. With the emergence of fractional-order differential equation model in more and more scientific fields， the theoretical analysis of fractional-order differential equations is particularly urgent.The first chapter is mainly about some definitions， lemmas and prepa-ration theorems， preparing for the presentation of follow-up results.In chapter 2， after a brief introduction， in section 2， nonlinear frac-tional differential equations involving different Riemann-Liouville fractional derivatives are presented; in sections 3 and 4， three-point boundary value problem and multi-point boundary value problem under different conditions are discussed; in section 5， integral boundary value problem for nonlinear fractional differential equations on an unbounded domain is presented; sec-tion 6 is about the existence and uniqueness of positive solutions to arbitrary order nonlinear fractional differential equations with advanced arguments.Section 7 is concerned with the eigenvalue interval for the existence and nonexistence of at least one positive solution of nonlinear fractional dif-ferential equation with integral boundary conditions. In section 8， under certain nonlinear growth conditions of the nonlinearity， the existence of so-lutions for a nonlinear Hadamard type fractional differential equation with strip condition and p-Laplacian operator is studied.In section 9， the unique-ness， existence and nonexistence of solutions of the fractional turbulent fiow model are discussed.Chapter 3 is about nonlinear fractional integro-differential equation.Section 2 is about initial value problem for nonlinear neutral fractional integro-differential equation with nonlinear term depending on lower order derivative. In the third section， the existence of minimal nonnegative so-lution for a class of nonlinear fractional integro-differential equations on semi-infinite intervals in Banach spaces is discussed. Section 4 is concerned with the existence of solutions for nonlinear fractional differential equations of Volterra type with nonlocal fractional integro-differential boundary con-ditions on an infinite interval. In section 5， a Hadamard type fractional integro-differential equation on infinite intervals is considered.Nonlinear impulsive fractional differential equation is the focus of Chap-ter 4.Nonlinear impulsive fractional differential equations with anti-periodic boundary conditions are discussed in section 2. Section 3 is about nonlinear impulsive fractional differential equations with nonlocal integral boundary condition. Section 4 is concerned with nonlinear Langevin equa-tion with two different fractional orders and impulses.Chapter 5 is devoted to the system of nonlinear fractional differentialequation. In Section 2， the existence results and the monotone iterativetechnique for systems of nonlinear fractional differential equations are p-resented.Section 3 is about the existence of an extremal solution for a nonlinear system involving the right-handed Riemann-Liouville fractional derivative with nonlocal coupled integral boundary conditions. Section 4 is about the existence of solutions for a coupled system of nonlinear neutral fractional differential equations， which involves Riemann-Liouville deriva-tives of different fractional orders.Section 5 in the chapter is concerned with a coupled system of nonlinear fractional differential equations with multi-point fractional boundary conditions on an unbounded domain.At the end of each chapter， there are short notes and remarks indicating the source of the content.

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