Centres and limit cycles for an extended Kukles system.
Hill, Joe M., Lloyd, Noel G., Pearson, Jane M. (2007)
Electronic Journal of Differential Equations (EJDE) [electronic only]
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Displaying similar documents to “Constant invariant solutions of the Poincaré center-focus problem.”
Centres and limit cycles for an extended Kukles system.
Uniformly isochronous polynomial centers.
Ivanov, Vladimir V., Volokitin, Evgenii P. (2005)
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Centering conditions for planar septic systems.
Volokitin, Evgenii P. (2003)
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On symmetric semialgebraic sets and orbit spaces
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For a symmetric (= invariant under the action of a compact Lie group G) semialgebraic basic set C, described by s polynomial inequalities, we show, that C can also be written by s + 1 G-invariant polynomials. We also describe orbit spaces for the action of G by a number of inequalities only depending on the structure of G.
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Tabor, Jacek (2005)
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Ambrosetti-Prodi type results in a system of second and fourth-order ordinary differential equations.
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