摘要: In this paper foe bifurcation of critical points for the quadratic systems of type(II)and (Ⅲ) is investigated. and an answer to the problem given in[1] is given.
张祥. BIFURCATION PROBLEM OF CRITICAL POINTS FOR QUADRATIC DIFFERENTIAL SYSTEMS[J]. Applied Mathematics and Mechanics (English Edition), 1997, 18(12): 1177-1190.
Zhang Xiang. BIFURCATION PROBLEM OF CRITICAL POINTS FOR QUADRATIC DIFFERENTIAL SYSTEMS[J]. Applied Mathematics and Mechanics (English Edition), 1997, 18(12): 1177-1190.