Limit Cycles and Analytic Centers for a Family of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mn>4</mml:mn><mml:mi>n</mml:mi><mml:mo>-</mml:mo><mml:mn>1</mml:mn></mml:math>Degree Systems with Generalized Nilpotent Singularities
Journal of function spaces