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| [mcode]http://en.wikipedia.org/wiki/Trefoil_knot In[1]:= ParametricPlot3D[{Sin[t] + 2 Sin[2 t], Cos[t] - 2 Cos[2 t], -Sin[3 t]}, {t, 0, 2 Pi}] Out[1]= ...PlotSnipped... http://en.wikipedia.org/wiki/Figure-eight_knot_(mathematics) In[3]:=... |