【摘要】 证明了具有退化四次曲线解[y-(x-1)~2]~2=0的Kolmogorov三次系统是可以存在极限环的.并举出了具体的例子.更多还原

【Abstract】 In this paper,it is shown that the Kolmogorov cubic system with degenerate quartic curve solution [y-(x-1)~2]~2=0, may have limit cycles,and a concrete example is given.更多还原