Anonanon 152k1212 gold badges233233 silver badges398398 bronze badges $endgroup$ 4 $begingroup$ Which is excellent thanks a bunch! I also posted a similar question below: math.stackexchange.com/inquiries/2135276/… that you might have some Perception on? $endgroup$ The Levi-Civita image is most frequently used in three and four Proportions, also to some extent in https://levis-4d17159.blogolenta.com/23700918/not-known-details-about-levis-4d