On the fattening of ACM arrangements of codimension 2 subspaces in P^N

In the present note we study configurations of codimension 2 flats in projective spaces and classify those with the smallest rate of growth of the initial sequence. Our work extends those of Bocci, Chiantini in P^2 and Janssen in P^3 to projective spaces of arbitrary dimension.
Comment: 8 pages