Professor at the University of Mons (UMONS).
Research interests: databases, consistent query answering, temporal databases, and data mining.
Member of TIMECENTER.
Member of the editorial board of Information Processing Letters.
Former member (2011-2017) of the editorial board of The VLDB Journal.
Program co-chair of TIME 2010 and SUM 2013.
Co-author (with Paraschos Koutris) of an article that was awarded the ACM SIGMOD Research Highlight Award 2015.
|Jef Wijsen: Certain conjunctive query answering in first-order logic. ACM Trans. Database Syst. 37(2): 9 (2012) [pdf]|
|Wenfei Fan, Floris Geerts, Jef Wijsen: Determining the Currency of Data. ACM Trans. Database Syst. 37(4): 25 (2012) [pdf]|
|Dany Maslowski, Jef Wijsen: A Dichotomy in the Complexity of Counting Database Repairs. Journal of Computer and System Sciences (2013) [pdf]|
|Floris Geerts, Fabian Pijcke, Jef Wijsen: First-Order Under-Approximations of Consistent Query Answers. Int. J. Approx. Reasoning 83: 337-355 (2017) [pdf]|
|Paraschos Koutris, Jef Wijsen: Consistent Query Answering for Self-Join-Free Conjunctive Queries Under Primary Key Constraints. ACM Trans. Database Syst. 42(2): 9 (2017) [pdf]|