A note on Hilbert 16th problem

Let H(n) be the maximum number of limit cycles that a planar polynomial vector field of degree n can have. In this paper we prove that H(n) is realizable by structurally stable vector fields with only hyperbolic limit cycles and that it is a strictly increasing function whenever it is finite.

Bibliographic Details
Authors: Gasull, Armengol|||0000-0002-1719-8231, Santana, Paulo Henrique Reis|||0000-0001-6942-351X
Format: article
Publication Date:2025
Country:España
Institution:Universitat Autònoma de Barcelona
Repository:Dipòsit Digital de Documents de la UAB
Language:English
OAI Identifier:oai:ddd.uab.cat:309367
Online Access:https://ddd.uab.cat/record/309367
https://dx.doi.org/urn:doi:10.1090/proc/17116
Access Level:Open access
Keyword:Hilbert 16th problem
Limit cycles
Structurally stable vector fields
Description
Summary:Let H(n) be the maximum number of limit cycles that a planar polynomial vector field of degree n can have. In this paper we prove that H(n) is realizable by structurally stable vector fields with only hyperbolic limit cycles and that it is a strictly increasing function whenever it is finite.