Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica
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Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica, 2003, Number 1, Pages 31–46 (Mi basm185)  

This article is cited in 10 scientific papers (total in 10 papers)

Research articles

Quadratic systems with limit cycles of normal size

Leonid A. Cherkasa, Joan C. Artésb, Jaume Llibreb

a Belarusian State University of Informatics and Radioelectronics, Minsk, Belarus
b Departament de Matemàtiques, Universitat Autònoma de Barcelona, Barcelona, Spain
References:
Abstract: In the class of planar autonomous quadratic polynomial differential systems we provide 6 different phase portraits having exactly 3 limit cycles surrounding a focus, 5 of them have a unique focus. we also provide 2 different phase portraits having exactly 3 limit cycles surrounding one focus and 1 limit cycle surrounding another focus. the existence of the exact given number of limit cycles is proved using the dulac function. all limit cycles of the given systems can be detected through numerical methods; i.e. the limit cycles have “a normal size” using perko's terminology.
Keywords and phrases: quadratic systems, limit cycles.
Received: 18.10.2002
Bibliographic databases:
Document Type: Article
MSC: 34C07, 34C08
Language: English
Citation: Leonid A. Cherkas, Joan C. Artés, Jaume Llibre, “Quadratic systems with limit cycles of normal size”, Bul. Acad. Ştiinţe Repub. Mold. Mat., 2003, no. 1, 31–46
Citation in format AMSBIB
\Bibitem{черArtLli03}
\by Leonid~A.~Cherkas, Joan~C.~Art\'es, Jaume~Llibre
\paper Quadratic systems with limit cycles of normal size
\jour Bul. Acad. \c Stiin\c te Repub. Mold. Mat.
\yr 2003
\issue 1
\pages 31--46
\mathnet{http://mi.mathnet.ru/basm185}
\mathscinet{http://mathscinet.ams.org/mathscinet-getitem?mr=1992648}
\zmath{https://zbmath.org/?q=an:1050.34038}
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  • https://www.mathnet.ru/eng/basm/y2003/i1/p31
  • This publication is cited in the following 10 articles:
    Citing articles in Google Scholar: Russian citations, English citations
    Related articles in Google Scholar: Russian articles, English articles
    Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica
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    Full-text PDF :182
    References:75
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