in this paper we consider the two parametraic perturbation for planar systems

we consider the irrediucible quratic perturbation on the third order oscillator

differental equationn this paper we consider systems nonlinear third order

In this paper we consider the effect of forcing and damping on the Van der Pol equation

In this paper we cosider the effect of nonlinear damping on the nonlinear pedulum. Also we look at the effect of forced on the pedulum and check thje chaos for the pedulum

در این مقاله ببررسی اثر اختلات جملات خیر خطی اصطکاک بر روی معادله دیفراسیل مرتبه سه می پردازیم

In this talk we consider effect of two parametric perturbation on the periodic orbits the Van der Pol equation

bifurcation and permanent DNA damage region for P53 model