第三章：作者研究了某一类负系数的单叶调和函数，得到它的一些充要条件等。
In the last chapter: the author investigates certain kind of harmonic univalent function with negative coefficients and obtain some sufficient-necessary conditions for this new kind function.
摘要利用由三角级数和幂级数复合构成的函数项级数的有关性质，得到了一类变系数非齐次调和方程边值问题的级数解。
In this paper by using the property of Fourier series a compound series consisting of trigonometric series and power series is established.
对函数族的包含关系及a级负系数调和凸函数族进行了一些研究。
Also, we has studied the inclusion relations to the class of analytic functions and harmonic univalent functions with negative coefficients.
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