Quasiradial Bochner-Riesz means for some nonsmooth distance functions Yong-Jung Kim Bochner-Riesz operatorsweak-type estimates Indiana University Mathematics Journal 1997 text pdf 10.1512/iumj.1997.46.1365 10.1512/iumj.1997.46.1365 en Indiana Univ. Math. J. 46 (1997) 1155 - 1180 state-of-the-art mathematics http://iumj.org/access/