OP-00461 Open The sharp savings from junctions in planar connection networks MG · AIM Open Applied Problems · minimum spanning trees · Steiner minimal trees
OP-00726 Solution claimed Strong thin-tree conjecture CO · AIM Open Applied Problems · edge connectivity · spanning trees · thin trees
OP-00852 Open A sharp differing-edge bound for convex plane-tree flips CO · AIM Open Applied Problems · flip graphs · non-crossing spanning trees
OP-00853 Open The happy-edge conjecture for convex plane spanning trees CO · AIM Open Applied Problems · flip graphs · non-crossing spanning trees