A countable set of directions is sufficient for Steiner symmetrization

Gabriele Bianchi, Daniel A. Klain, Erwin Lutwak, Deane Yang, Gaoyong Zhang. A countable set of directions is sufficient for Steiner symmetrization. Adv. Appl. Math., 47(4):869-873, 2011. [doi]

Abstract

Abstract is missing.