P/NP Policy
New submission policy on P vs. NP (October 2013): No author may submit more than one paper to J. ACM, ACM Trans. on Algorithms, ACM Trans. on Computation Theory, or SIAM J. on Computing in any 24-month period, purporting to resolve the P versus NP question or related long-standing questions in complexity theory, except by invitation of the Editor-in-Chief. This applies to resubmissions of previously rejected manuscripts.