Structure Results on the Maximal Hilbert Transform and Two-Weight Norm Inequalities M. Leckband Indiana University Mathematics Journal 1985 text pdf 10.1512/iumj.1985.34.34016 10.1512/iumj.1985.34.34016 en Indiana Univ. Math. J. 34 (1985) 259 - 275 state-of-the-art mathematics http://iumj.org/access/