MULTIBuckle Strange Attractors in a PWL VanDerPol type system

See my paper :

in the Int. Journ. of Bifurcation and Chaos 9(6), 1009-1039, (1999), (IJBC).

See also a Gallery of multispiral Strange Attractors in the modified Chua's dynamical system

See also some multispiral Strange Attractors in some nonautonomous dynamical system

See also some multispiral Strange Attractors in some Brocket type system

See also some multispiral Strange Attractors in some PWL Reich-Kapitaniak type system

The nonautonomous VanDerPol system is
dx/dt = y-f(x), dy/dt = -alpha.x + b.cos(t) ,
f(x)= x^3/3 - x, (alpha and b parameters). In the ref. given above, I modified f to get some new strange attractors showing `multibuckles' solutions:

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Various strange attractors exhibited by the modified Vdp's system

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