復(fù)平面和單位圓內(nèi)高階線性微分方程解同小函數(shù)的關(guān)系
[Abstract]:In this paper, we study the complex oscillation properties of solutions of higher order linear differential equations whose coefficients are meromorphic functions and whose coefficients are periodic functions by using the Nevanlinna value distribution theory. The full text is divided into four chapters. In the first chapter, the development history of complex linear differential equations is briefly summarized, and some basic concepts and common notations of analytic and meromorphic functions in complex plane and unit circle are introduced. In chapter 2, we study the relationship between meromorphic solutions of higher order linear differential equations and their first order derivatives and small functions on complex plane, and obtain the convergence exponents of the points in which the solutions of differential equations take small functions. In chapter 3, we study the existence and representation of nontrivial subnormal solutions for a class of higher order linear periodic differential equations on complex plane, and obtain some properties of solutions of higher order linear periodic differential equations. In chapter 4, we study the growth of meromorphic solutions of higher order linear differential equations in a unit circle under certain conditions, and estimate the convergence exponents when the solutions of differential equations are small.
【學(xué)位授予單位】:江西師范大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:O174.5
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