The Steady Magnetodynamic Flow of Perfectly Conducting Fluids Penelope Smith Indiana University Mathematics Journal 1963 text pdf 10.1512/iumj.1963.12.12032 10.1512/iumj.1963.12.12032 en Indiana Univ. Math. J. 12 (1963) 505 - 520 state-of-the-art mathematics http://iumj.org/access/