Regularity for the Vlasov Equations in a Half Space Yan Guo Indiana University Mathematics Journal 1994 text pdf 10.1512/iumj.1994.43.43013 10.1512/iumj.1994.43.43013 en Indiana Univ. Math. J. 43 (1994) 255 - 320 state-of-the-art mathematics http://iumj.org/access/