Anonanon 152k1212 gold badges233233 silver badges398398 bronze badges $endgroup$ four $begingroup$ Which is great many thanks a bunch! I also posted an analogous problem in this article: math.stackexchange.com/thoughts/2135276/… that You could have some Perception on? $endgroup$ The Levi-Civita image is most often used in 3 and 4 Proportions, also to https://robertt123ebw0.liberty-blog.com/profile