Concave Programming Upper Bounds on the Capacity of 2-D Constraints

Ido Tal Ron M. Roth Concave Programming Upper Bounds on the Capacity of 2-D Constraints http://arxiv.org/abs/0801.1126 2008 CoRR abs/0801.1126 db/journals/corr/corr0801.html#abs-0801-1126 informal publication