REPEȘCO, Vadim
(Universitatea de Stat din Tiraspol, 2020)
Consider the generic cuartic differential system x & = P(x, y), y & = Q(x, y) , where P,Q∈ ℝ[𝑥, 𝑦], max deg ,deg 4 { P Q} = ,GCD P Q ( , 1 ) = . If a polynomial differential system has enough invariant straight lines ...