Inversion and General Invariance in Space-Time

摘要: A general formula for division in a relativistic Clifford-Dirac algebra is derived. Where division is undefined turns out, in many cases, to correspond to areas of physical interest, such as the light cone, invariant quantities in electromagnetism, and the basis set of quantities in the Dirac equation. Apart from such areas, where there has already been significant development in science, new sets of inter-related quantities, involving the spin and the total energy for example, are sugested as possibilities for further investigation and development.