Partial map from the place-based inversions (i,j){\displaystyle (i,j)} to the element-based inversions (π(i),π(j)){\displaystyle {\bigl (}\pi (i),\pi (j){\bigr )}} of a 4-element permutation π{\displaystyle \pi }
Own work
WatchduckYou can name the author as "T. Piesk", "Tilman Piesk" or "Watchduck".