Anonanon 152k1212 gold badges233233 silver badges398398 bronze badges $endgroup$ four $begingroup$ Which is perfect 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 significance of Levi-Civita properties in four dimensions lies in their job during the mathematical description https://tonyq765nnl3.blogpixi.com/profile