Definition:Rubik's Cube/Center Facet/Linguistic Note

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Linguistic Note on Center Facet of Rubik's Cube

In the notation $S_Z$ for the center facets of Rubik's cube, the subscript $Z$ is for zentrum, which is German for center.

$C$ cannot be used, because $S_C$ is already in use as the symbol denoting the set of corner facets.


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