ANTS 2012 special issue

This special issue of the Swarm Intelligence journal is dedicated to the publication of extended versions of the best papers presented atANTS 2014, Ninth International Conference on Swarm Intelligence, which took place in Brussels on September 10–12, 2014. The ANTS series of conferences has taken place at the Université Libre de Bruxelles, Brussels, Belgium, every other year since 1998. As in 2010 and in 2012 (for the seventh and eighth editions of the conference), the authors of the contributions accepted as full papers at the conferencewere invited to submit an extended version of their work for possible inclusion in this special issue.