Interpolation at Discrete Subsets of C^n Thomas Bloom Indiana University Mathematics Journal 1990 text pdf 10.1512/iumj.1990.39.39055 10.1512/iumj.1990.39.39055 en Indiana Univ. Math. J. 39 (1990) 1223 - 1243 state-of-the-art mathematics http://iumj.org/access/