1981/05/01 by Greg N. Frederickson, Joseph Ja’Ja’, Joseph F. JáJá · 20 citations
Computer Science · #Complexity and Algorithms in Graphs #Optimization and Search Problems #Advanced Graph Theory Research
paper · doi:10.1137/0210019
Graph augmentation problems on a weighted graph involve determining a minimum-cost set of edges to add to a graph to satisfy a specified property, such as biconnectivity, bridge-connectivity or strong connectivity. These augmentation problems are shown to be NP-complete in the restricted case of the graph being initially connected. Approximation algorithms with favorable time complexity are presented and shown to have constant worst-case performance ratios.