Finite Cyclicity of HH-graphics with a Triple Nilpotent Singularity of Codimension 3 or 4

Series
CDSNS Colloquium
Time
Monday, February 17, 2014 - 11:00am for 1 hour (actually 50 minutes)
Location
Skiles 006
Speaker
Chunhua Shan – School of Mathematics, Georgia Institute of Technology
Organizer
Chunhua Shan
In 1994, Dumortier, Roussarie and Rousseau launched a program aiming at proving the finiteness part of Hilbert’s 16th problem for the quadratic system. For the program, 121 graphics need to be proved to have finite cyclicity. In this presentation, I will show that 4 families of HH-graphics with a triple nilpotent singularity of saddle or elliptic type have finite cyclicity. Finishing the proof of the cyclicity of these 4 families of HH-graphics represents one important step towards the proof of the finiteness part of Hilbert’s 16th problem for quadratic systems. This is a joint work with Professor Christiane Rousseau and Professor Huaiping Zhu.