= Chacon transformation
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= Chacon map
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The standard three-cut Chacon transformation is an invertible <measure-preserving transformation> built by <cutting and stacking> with spacer vector $(0,1,0)$ at every stage. Cut the current tower into three equal subcolumns, place one spacer above the middle, and stack left to right. With initial width $2/3$ and height one on a unit interval, level counts and widths are $h_j=(3^{j+1}-1)/2$ and $w_j=2/3^{j+1}$. Tower measure tends to one, using total spacer measure $1/3$. Tower words obey $W_{j+1}=W_jW_j1W_j$.
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