Anonanon 152k1212 gold badges233233 silver badges398398 bronze badges $endgroup$ four $begingroup$ Which is fantastic many thanks a bunch! I also posted an analogous question here: math.stackexchange.com/inquiries/2135276/… that You may have some insight on? $endgroup$ The Levi-Civita image is most often used in a few and four dimensions, also to some https://levis4d82580.life3dblog.com/26395113/details-fiction-and-levis-4d