Shang-En Huang, Seth Pettie. Lower Bounds on Sparse Spanners, Emulators, and Diameter-reducing shortcuts. In David Eppstein, editor, 16th Scandinavian Symposium and Workshops on Algorithm Theory, SWAT 2018, June 18-20, 2018, Malmö, Sweden. Volume 101 of LIPIcs, Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik, 2018. [doi]
Abstract is missing.