In this paper, we investigate the calculation method of focal values for E13systems. By means of Poincare method and Wu elimination, we design a special algorithm to calculate focal values for E13 systems and obtain s...In this paper, we investigate the calculation method of focal values for E13systems. By means of Poincare method and Wu elimination, we design a special algorithm to calculate focal values for E13 systems and obtain some satisfactory results on analysing the number of limit cycles for E13 systems.展开更多
In this paper, we discuss focal quantities and bifurcation of limit cycles forE^1_3 systems. By means of the algorithm designed in [l] and by computing, weanalyse completely the conditions for the origin being a cente...In this paper, we discuss focal quantities and bifurcation of limit cycles forE^1_3 systems. By means of the algorithm designed in [l] and by computing, weanalyse completely the conditions for the origin being a center and the orderof the origin being a fine focus in the both cases of B/0 and B= 0 for E^1_3systems.展开更多
文摘In this paper, we investigate the calculation method of focal values for E13systems. By means of Poincare method and Wu elimination, we design a special algorithm to calculate focal values for E13 systems and obtain some satisfactory results on analysing the number of limit cycles for E13 systems.
文摘In this paper, we discuss focal quantities and bifurcation of limit cycles forE^1_3 systems. By means of the algorithm designed in [l] and by computing, weanalyse completely the conditions for the origin being a center and the orderof the origin being a fine focus in the both cases of B/0 and B= 0 for E^1_3systems.