Please use this identifier to cite or link to this item:
|Title:||Applying Ad-hoc global constraints with the case constraint to still-life|
Binary decision diagram
|Citation:||Cheng, K.C.K., Yap, R.H.C. (2006). Applying Ad-hoc global constraints with the case constraint to still-life. Constraints 11 (2-3) : 91-114. ScholarBank@NUS Repository. https://doi.org/10.1007/s10601-006-8058-9|
|Abstract:||The Still-Life problem is challenging for CP techniques because the basic constraints of the game of Life are loose and give poor propagation for Still-Life. In this paper, we show how ad hoc global case constraints can be customized to construct various models to provide much stronger propagation with CP solvers. Since we use custom ad hoc constraints of high arity where the number of tuples to define the constraint are large, the actual constraint representation becomes important to avoid excessive space consumption. We demonstrate how to use BDDs to construct good representations for the case constraint which is critical for efficiency. Our results seem comparable to hybrid CP/IP models even though we are only using propagation albeit on ad hoc global constraints. This paper shows an extensive example of how to systematically build models using different kinds of ad hoc constraints. It also demonstrates the solving potential of ad hoc global constraints. © Springer Science + Business Media, LLC 2006.|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Sep 20, 2018
WEB OF SCIENCETM
checked on Sep 5, 2018
checked on Sep 22, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.