COZMA, Dumitru
(Universitatea Pedagogică de Stat "Ion Creangă", 2023)
We consider the Lotka-Volterra differential equation:y(a2x +b2y+c2)dx=x(a1x +b1y+c1)dy in which the coefficients a1, b1, c1, a2, b2, c2 and variables x, y are assumed to be real. This equation introduced by Lotka and ...