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Conference papers
Decomposition of the NValue Constraint
Abstract : We study decompositions of the global NVALUE constraint. Our main contribution is theoretical: we show that there are propagators for global constraints like NVALUE which decomposition can simulate with the same time complexity but with a much greater space complexity. This suggests that the benefit of a global propagator may often not be in saving time but in saving space. Our other theoretical contribution is to show for the first time that range consistency can be enforced on NVALUE with the same worst-case time complexity as bound consistency. Finally, the decompositions we study are readily encoded as linear inequalities. We are therefore able to use them in integer linear programs.
Cited literature [22 references]
https://hal-lirmm.ccsd.cnrs.fr/lirmm-00558048
Contributor : Martine Peridier Connect in order to contact the contributor
Submitted on : Friday, September 20, 2019 - 11:39:31 AM
Last modification on : Friday, October 22, 2021 - 3:07:33 PM
Long-term archiving on: : Sunday, February 9, 2020 - 3:28:48 AM
Contributor : Martine Peridier Connect in order to contact the contributor
Submitted on : Friday, September 20, 2019 - 11:39:31 AM
Last modification on : Friday, October 22, 2021 - 3:07:33 PM
Long-term archiving on: : Sunday, February 9, 2020 - 3:28:48 AM
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1007.0603.pdf
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