Definability and decidability problems in number theory May 6 to May 10, 2019 American Institute of Mathematics, San Jose, CA Organizers: Kirsten Eisentraeger, Valentina Harizanov, Jennifer Park, and Alexandra Shlapentokh Description: This workshop, sponsored by AIM and the NSF, will be devoted to definability and decidability problems in number theory. Deadline: November 15, 2018 Details: http://aimath.org/workshops/upcoming/definedecide