This paper investigates the limit cycles for planar differential system x ˙ = λ x − y + P n ( x , y ) , y ˙ = x… Click to show full abstract
This paper investigates the limit cycles for planar differential system x ˙ = λ x − y + P n ( x , y ) , y ˙ = x + λ y + Q n ( x , y ) , where P n ( x , y ) , Q n ( x , y ) are homogeneous polynom...
               
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