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单词 BautinsTheorem
释义

Bautin’s theorem


There are at most three limit cycles which can appear in the following quadratic system

x˙=p(x,y)=i+j=02aijxiyj
y˙=q(x,y)=i+j=02bijxiyj

from a singular pointMathworldPlanetmathPlanetmath, if its type is either a focus or a center.

In 1939 N.N. Bautin claimed the above result and in 1952 submitted the proof [BNN1]. [GAV]

References

  • GAV Gaiko, A., Valery: Global Bifurcation Theory and Hilbert’s Sixteenth Problem. Kluwer Academic Publishers, London, 2003.
  • BNN1 Bautin, N.N.: On the number of limit cycles appearing from an equilibrium point of the focus or center type under varying coefficients. Matem. SB., 30:181-196, 1952. (written in Russian)
  • BNN2 Bautin, N.N.: On the number of limit cycles appearing from an equilibrium point of the focus or center type under varying coefficients. TranslationMathworldPlanetmathPlanetmath of the American Mathematical Society, 100, 1954.
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