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CORR
2010
Springer
133views Education» more  CORR 2010»
15 years 7 months ago
Santa Claus Schedules Jobs on Unrelated Machines
One of the classic results in scheduling theory is the 2-approximation algorithm by Lenstra, Shmoys, and Tardos for the problem of scheduling jobs to minimize makespan on unrelate...
Ola Svensson
ECCC
2010
111views more  ECCC 2010»
15 years 7 months ago
Tight Bounds on the Approximability of Almost-satisfiable Horn SAT and Exact Hitting Set}
We study the approximability of two natural Boolean constraint satisfaction problems: Horn satisfiability and exact hitting set. Under the Unique Games conjecture, we prove the fo...
Venkatesan Guruswami, Yuan Zhou
EJC
2010
15 years 7 months ago
Enumeration results for alternating tree families
We study two enumeration problems for up-down alternating trees, i.e., rooted labelled trees T, where the labels v1, v2, v3, . . . on every path starting at the root of T satisfy v...
Markus Kuba, Alois Panholzer
DEDS
2008
48views more  DEDS 2008»
15 years 7 months ago
On the Minimization of Communication in Networked Systems with a Central Station
The problem of minimizing communication in a distributed networked system is considered in a discrete-event formalism where the system is modeled as a finite-state automaton. The s...
Weilin Wang, Stéphane Lafortune, Feng Lin
FGCS
2008
109views more  FGCS 2008»
15 years 7 months ago
A grid-aware MIP solver: Implementation and case studies
This paper presents a grid-enabled system for solving large-scale mixed integer programming (MIP) problems. The system has been developed using Globus and MPICH-G2, and consists o...
Emilio Pasquale Mancini, Sonya Marcarelli, Igor Va...