Abstract

The momentum balance of Dirac-like electrodynamics is established in Da Silveira's notation. The notation of De Silveira [1] obviously is of great heuristic importance. In establishing the Max-well-Dirac isomorphy, for instance, it avoids the artifice [2, (6)] and, in addition, brings about the Darwin relation [2, (7)] automatically. Therefore we want to investigate how the momentum balance [4. (11)] is represented in Da Silveira's formalism. According to De Silveira we may put the Dirac-like electrodynamics [2, (5)] into the form \et ® /d(ct) Multiplication by the matrix f<D i i ® i(a-E) (a-H) = 0. (1) (2) from the left yields V-ei ® \ a © pi)d(ct) (a-H) = 0. (3)