Measure filters: An extension of Weiner's Theorem Nikan FiroozyeVladimir Sverak Indiana University Mathematics Journal 1996 text pdf 10.1512/iumj.1996.45.1972 10.1512/iumj.1996.45.1972 en Indiana Univ. Math. J. 45 (1996) 695 - 708 state-of-the-art mathematics http://iumj.org/access/