Two members of our research group are going to give talks at this year's congress of the International Society for the History of Philosophy of Science (HOPOS) in Groningen which takes place between the 9th and 12th of July 2018. Ádám Tamás Tuboly's talk on "The 1940-45 Neurath-Carnap correspondence and its philosophical significance" is going to be part of the panel on "Rudolf Carnap's Professional Correspondences", while Iulian Toader is going to give a talk "On von Neumann’s Use of Hankel’s Principle of Permanence of Forms".