Anonanon 152k1212 gold badges233233 silver badges398398 bronze badges $endgroup$ 4 $begingroup$ That's perfect thanks a bunch! I also posted an analogous problem right here: math.stackexchange.com/issues/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://janew169apc8.tkzblog.com/profile