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ARTÍCULO
TITULO

Limit cycles from an elliptic center.

J. Billeke    
E. Sáez    
I. Szántó    

Resumen

Estudio de la existencia de ciclos Límites. Se exhiben dos demostraciones de la existencia de tales ciclos, una por métodos de blowing-up elípticos y otra por perturbaciones de centros elípticos.

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