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» Crozzle: an NP-complete problem
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PPL
2007
71views more  PPL 2007»
13 years 5 months ago
Scheduling Algorithms for Data Redistribution and Load-Balancing on Master-Slave Platforms
In this work we are interested in the problem of scheduling and redistributing data on master-slave platforms. We consider the case were the workers possess initial loads, some of...
Loris Marchal, Veronika Rehn, Yves Robert, Fr&eacu...
RECOMB
2010
Springer
13 years 4 months ago
Consistency of Sequence-Based Gene Clusters
In comparative genomics, various combinatorial models can be used to specify gene clusters — groups of genes that are co-located in a set of genomes. Several approaches have been...
Roland Wittler, Jens Stoye
JGT
2010
109views more  JGT 2010»
13 years 12 days ago
Homomorphism-homogeneous graphs
We answer two open questions posed by Cameron and Nesetril concerning homomorphismhomogeneous graphs. In particular we show, by giving a characterization of these graphs, that ext...
Momchil Rusinov, Pascal Schweitzer
CORR
2008
Springer
106views Education» more  CORR 2008»
13 years 5 months ago
Modular difference logic is hard
In connection with machine arithmetic, we are interested in systems of constraints of the form x + k y + k . Over integers, the satisfiability problem for such systems is polynomi...
Nikolaj Bjørner, Andreas Blass, Yuri Gurevi...
AAAI
2008
13 years 8 months ago
Phase Transitions and Complexity of Weighted Satisfiability and Other Intractable Parameterized Problems
The study of random instances of NP complete and coNP complete problems has had much impact on our understanding of the nature of hard problems. In this work, we initiate an effor...
Yong Gao