Approximation preserving reductions for set covering, vertex covering and independent set hierarchies under differential approximationa

TitleApproximation preserving reductions for set covering, vertex covering and independent set hierarchies under differential approximationa
Publication TypeJournal Article
Year of Publication2004
AuthorsEkim, T., and V. Th Paschos
JournalInternational Journal of Computer Mathematics
Volume81
Pagination569–582