How to plot the bifurcation diagram for the system of second order Differential equation?

10 October 2016 0 4K Report

(d2x/dt2) -(a1−2a1x−b1y)(dx/dt)+ a1x(dy/dt)= 0,

(d2 y/dt2 )−(1−x−b2 y−2y)(dy/dt)+ y(dx/dt)=0.

I want to plot the diagram between (y, b2 ), (x,a1), (x, b1).

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