| I. M. Benn and R. W. Tucker, Fermions without Spinors, Comm. Math. Phys., 89 (1983), 341--362 |
.... tensor form (Section 4) In Section 5 we discuss the simplifications which occur when we move from M 4 (3 dimensional Dirac equation) to M 3 (2 dimensional Dirac equation) Note that the fact that the Dirac equation can, in principle, be written in tensor form is not new; see, for example, [BT]. In the second part we adopt the point of view that the Dirac equation is not a precise equation, but a first approximation in an asymptotic process described by Feynman diagrams, and it should be used only when the external field A is weak, smooth, and slowly varying. We suggest the following ....
I. M. Benn and R. W. Tucker, Fermions without Spinors, Comm. Math. Phys., 89 (1983), 341--362
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I. M. Benn and R. W. Tucker, Fermions without Spinors, Comm. Math. Phys., 89 (1983), 341--362
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