(Received July 29, 1968)
It is shown that an equation of a spin-half particle involving a complete set of mutually anticommuting (2n+1) matrices furnishing the representation of Clifford Algebra Cn of order 2n can be reduced to the ordinary Dirac form involving only four anticommuting matrices when the particle is massive; in the case of massless particles it reduces to an equation involving five anticommuting matrices one occurring in a singular idempotent combination with the unit matrix. It is further shown that the above two forms are connected by a singular idempotent operator.
URL : http://ptp.ipap.jp/link?PTP/41/264/
DOI : 10.1143/PTP.41.264