Slide 1 Collective Tree Spanners of Graphs F.F. Dragan, C. Yan, I. Lomonosov Kent State University, USA Hiram College, USA Slide 2 G multiplicative tree 4- and additive tree…

Slide 1 Collective Tree Spanners and Routing in AT-free Related Graphs F.F. Dragan, C. Yan, D. Corneil Kent State University University of Toronto Slide 2 G multiplicative…

Network Flow Spanners F. F. Dragan and Chenyu Yan Kent State University, Kent, OH, USA Well-known Tree t -Spanner Problem Given unweighted undirected graph G=(V,E) and an…

Collective Tree Spanners of Graphs F.F. Dragan, C. Yan, I. Lomonosov Kent State University, USA Hiram College, USA G multiplicative tree 4- and additive tree 3-spanner of…

Collective Additive Tree Spanners of Homogeneously Orderable Graphs F.F. Dragan, C. Yan and Y. Xiang Kent State University, USA Well-known Tree t -Spanner Problem Given unweighted…