Anonanon 152k1212 gold badges233233 silver badges398398 bronze badges $endgroup$ 4 $begingroup$ That's best thanks a bunch! I also posted the same problem here: math.stackexchange.com/concerns/2135276/… that you might have some insight on? $endgroup$ The Levi-Civita image is most often used in three and 4 Proportions, and also to some extent in https://sethijgea.daneblogger.com/26427116/how-levis-4d-can-save-you-time-stress-and-money