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Paper   IPM / M / 17635
School of Mathematics
  Title:   The infinite level normal forms for non-resonant double Hopf singularities
  Author(s):  Majid Gazor (Joint with A. Shoghi)
  Status:   Published
  Journal: Systems & Control Letters
  Vol.:  176
  Year:  2023
  Pages:   10552-10565
  Supported by:  IPM
  Abstract:
In this paper, we explore hypernormal forms of vector fields that have non-resonant double Hopf singularities with a non-zero radial cubic part. Our primary focus is on investigating the infinite-level normal form classification of this type of singularities. We provide a normal form decomposition in terms of planar-rotating and planar-radial vector fields, which greatly facilitate the pattern recognition and analysis of the corresponding generalized homological maps. Notably, our paper represents the first instance of the normal form classification for general non-resonant double Hopf singularities without structural symmetry.

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