Polynomial first integrals for quasi-homogeneous polynomial differential systems

Nonlinearity - Tập 15 Số 4 - Trang 1269-1280 - 2002
Jaume Llibre1, Xiang Zhang2
1Departament de Matemàtiques, Universitat Autònoma de Barcelona, 08193 Bellaterra (Barcelona), Spain
2Department of Mathematics, Shanghai Jiaotong University,#N#Shanghai 200030, People's Republic of China

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