Leonid Libkin. Negative Knowledge for Certain Query Answers. In Magdalena Ortiz, Stefan Schlobach, editors, Web Reasoning and Rule Systems - 10th International Conference, RR 2016, Aberdeen, UK, September 9-11, 2016, Proceedings. Volume 9898 of Lecture Notes in Computer Science, pages 111-127, Springer, 2016. [doi]
Abstract is missing.