Core compactness and diagonality in spaces of open sets Francisco Jordan | Frédéric Mynard | Show more Francisco Jordan United States Queensborough Community College Queensborough Community College, Queens, NY, USA Frédéric Mynard United States Georgia Southern University Georgia Southern University, Statesboro, GA30460, USA Submitted: 2013-07-31 | Accepted: 2013-07-31 | DOI: https://doi.org/10.4995/agt.2011.1648