1. A preliminary account of the results in this paper was presented at the December 1959 meeting of the Plasma Physics Division of the American Physical Society at Monterey, California.
2. See, e.g., the paper of H. Grad inThe Magnetodynamics of Conducting Fluids, edited by D. Bershader (Stanford University Press, Stanford, California, 1959), and references cited therein.
3. We use distributions essentially as described in M. J. Lighthill,An Introduction to Fourier Analysis and Generalized Functions(Cambridge University Press, New York, 1958). However, as we are concerned with problems different from those considered by Lighthill, we find complications not present in his treatment.
4. See, e.g., reference 3.
5. Reference 3, pp. 37–38.