Finite quantum electrodynamics – the causal approa

In this textbook for graduate students in physics the author carefully analyses the role of causality in Q.E.D. This approach avoids ultraviolet divergences, so that the detailed calculations of scattering processes and proofs can be carried out in a mathematically rigorous manner. Significant themes such as renormalizability, gauge invariance, unitarity, renormalization group, interacting fields and axial anomalies are discussed. The extension of the methods to non-abelian gauge theories is briefly described.