Compactness of Velocity Averages Manuel Portilheiro 35L6535B6546E35Velocity averagesregularity of velocity averagescompactness of velocity averageskinetic formulationBesov spaces Indiana University Mathematics Journal 2002 text pdf 10.1512/iumj.2002.51.2213 10.1512/iumj.2002.51.2213 en Indiana Univ. Math. J. 51 (2002) 357 - 380 state-of-the-art mathematics http://iumj.org/access/