@Inproceedings{EPTCS215.20, author = {van Ditmarsch, Hans and Knight, Sophia and \"Ozg\"un, Ayb\"uke}, year = {2016}, title = {Announcement as effort on topological spaces}, editor = {Ramanujam, R}, booktitle = {{\rm Proceedings Fifteenth Conference on} Theoretical Aspects of Rationality and Knowledge, {\rm Carnegie Mellon University, Pittsburgh, USA, June 4-6, 2015}}, series = {Electronic Proceedings in Theoretical Computer Science}, volume = {215}, publisher = {Open Publishing Association}, pages = {283-297}, doi = {10.4204/EPTCS.215.20}, }