Hausdorff Dimension of Multiple Points of the (N, d) Wiener Process Chen Xiong Indiana University Mathematics Journal 1994 text pdf 10.1512/iumj.1994.43.43003 10.1512/iumj.1994.43.43003 en Indiana Univ. Math. J. 43 (1994) 55 - 60 state-of-the-art mathematics http://iumj.org/access/