Is there a uniform upper bound for the number of limit cycles of a quadratic vector field which has a unique singular point in the plane?
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1 Answer
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1
This survey seems to indicate that the answer is $1.$
answered Sep 4, 2017 at 16:28
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$\begingroup$ Thank you for this survey. What part of the survey indicate to $1$? Does the class I contains all quadratic vector field with a unique singularity? $\endgroup$ Commented Sep 5, 2017 at 4:46