Some classes of sets of structures definable without quantifiers James Rogers author Dakotah Lambert author 2019-07 text Proceedings of the 16th Meeting on the Mathematics of Language Philippe de Groote editor Frank Drewes editor Gerald Penn editor Association for Computational Linguistics Toronto, Canada conference publication rogers-lambert-2019-classes 10.18653/v1/W19-5706 https://aclanthology.org/W19-5706/ 2019-07 63 77