Arbitrariness of the General Solution and Symmetries
نویسنده
چکیده
The computation of the number of arbitrary functions in the general solution is brieey reviewed. The results are used to study normal systems and their symmetry reduction. We discuss the treatment of gauge systems, especially the analysis of gauge xing conditions. As examples the Yang-Mills equations with the Lorentz gauge and Einstein's vacuum eld equations with harmonic coordinates are considered.
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