The introduction of concepts of Game Theory and Ordinary Differential Equations into
Biology gave birth to the field of Evolutionary Stable Strategies, with applications in Biology …

In this paper we study the phase portraits in the Poincaré disk of the reversible vector fields
of type (2; 0) having generic bifurcations around a symmetric singular point p. We also prove …

We study a class of quadratic reversible polynomial vector fields on S2 with (3, 2)-type
reversibility. We classify all isolated singularities and we prove the nonexistence of limit …

Neste trabalho veremos os retratos de fase, no disco de Poincaré, das formas normais
locais das singularidades simétricas dos campos reversíveis do tipo (2; 0) e (2; 1) de baixa …

In this paper we study the centers of projective vector fields QT of threedimensional quasi-
homogeneous differential system dx/dt= Q (x) with the weight (m, m, n) and degree 2 on the …

We study a class of quadratic reversible polynomial vector fields on S 2 with (3, 2)-type
reversibility. We classify all isolated singularities and we prove the nonexistence of limit …

We study a class of quadratic reversible polynomial vector fields on S2 with (3, 2)-type
reversibility. We classify all isolated singularities and we prove the nonexistence of limit …