Anonanon 152k1212 gold badges233233 silver badges398398 bronze badges $endgroup$ 4 $begingroup$ That is fantastic many thanks a bunch! I also posted an analogous question here: math.stackexchange.com/queries/2135276/… that You may have some insight on? $endgroup$ The importance of Levi-Civita Attributes in four Proportions lies of their role during the mathematical description https://pabloh516ctn2.elbloglibre.com/profile