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# Cyclicity of unbounded semi-hyperbolic 2-saddle cycles in polynomial Lienard systems

• The paper deals with the cyclicity of unbounded semi-hyperbolic 2-saddle cycles in polynomial Liénard systems of type $(m,n)$ with $m<2n+1$, $m$ and $n$ odd. We generalize the results in [1] (case $m=1$), providing a substantially simpler and more transparant proof than the one used in [1].
Mathematics Subject Classification: 34C07; 34C37; 34D10.

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