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Русская версия

**A. F. Andreev**

Russia, 198504, Petergof, Universitetski pr.28

S.Peterburg State University

Faculty of Mathematics and Mechanics

**I. A. Andreeva**

Russia, 195251, Saint-Petersburg, Politekhnicheskaya str., 29,

Saint-Petersburg state technic university,

dept. of Higher mathematics

The continuation of the investigation begun in articles with the same title No. I and II (the same journal 2007, N 4; 2008, N 1,3; 2009, N 4 ). On a real plane (x,y) a normal autonomous system of differential equations is considered, being right parts are reciprocal forms of x and y with arbitrary constant coefficients (in one equation this form is square, and in the other equation it is cubic). In Part I of this investigation a singular point (0,0) of the system was studied, and in Part II each of possible infinite singular points of this system is investigated. In the present article for each possible for the system case, when a) a combination of expansions of right parts into irresolvable real multipliers is fixed, and b) a circular sequence of straight lines determined by these multipliers is fixed, topological types of all existing singular points of the system are described.