Permutohedron of order 3 with the three edges highlighted that correspond to 2-element subsets
In the two permutations in the edge corresponding to subset {a, b}, the coordinates on positions a and b are always 1 and 2, i.e. those that are smaller that the remaining one.
Watchduck You can name the author as "T. Piesk", "Tilman Piesk" or "Watchduck".
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subset is first block
subset is second block
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