Shizuo Kakutani, A Proof That there Exists a Circumscribing Cube Around Any Bounded Closed Convex Set in R3, Annals of Mathematics, Vol. 43, No. 4 (Oct., 1942), pp. 739-741 ...

It is well known that the IPFP is a sequence of successive I-projections onto sets of probability measures with fixed marginals. However, when finding the I-projection onto the intersection of ...