Anonanon 152k1212 gold badges233233 silver badges398398 bronze badges $endgroup$ four $begingroup$ Which is perfect thanks a bunch! I also posted an analogous query below: math.stackexchange.com/thoughts/2135276/… that you might have some insight on? $endgroup$ The Levi-Civita symbol is most often used in three and 4 Proportions, also to some extent in https://erichd455jgb2.buyoutblog.com/profile