On the nonsingular quadratic differential equations in the plane

Gasull, A.; Llibre, J.

doi:10.1090/S0002-9939-1988-0964858-4

On the nonsingular quadratic differential equations in the plane
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by A. Gasull and J. Llibre PDF

Proc. Amer. Math. Soc. 104 (1988), 793-794 Request permission

Abstract:

We point out that the maximum number of inseparable leaves of nonsingular polynomial differential equations of degree two is 3, and we present an example with exactly 3 inseparable leaves.

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