Invited Article Foreword

The Invited Article section of this issue consists of the article “Minimization of Tree Patterns” by Wojciech Czerwiński, Wim Martens, Matthias Niewerth, and Paweł Parys, which was invited from the 35th Annual ACM Symposium on Principles of Distributed Computing (PODC’16). We want to thank the PODC’16 Program Committee, the PC chair Wang-Chiew Tan, and JACM editor Georg Gottlob for their help in selecting this invited article, and editor Dan Suciu for handling the article.