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Global Structure of Planar Quadratic Semi-Quasi-Homogeneous Polynomial Systems
  
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KeyWord:Semi-quasi-homogeneous  quadratic system  singular point  global phase portraits
Author NameAffiliation
Zecen He School of Mathematics and Systems Science, Guangdong Polytechnic Normal University, Guangzhou , Guangdong 510665, China 
Haihua Liang School of Mathematics and Systems Science, Guangdong Polytechnic Normal University, Guangzhou , Guangdong 510665, China 
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Abstract:
      This paper study the planar quadratic semi-quasi-homogeneous polynomial systems(short for PQSQHPS). By using the nilpotent singular points theorem, blow-up technique, Poincaré index formula, and Poincaré compaction method, the global phase portraits of such systems in canonical forms are discussed. Furthermore, we show that all the global phase portraits of PQSQHPS can be-classed into six topological equivalence classes.