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ICDT
2010
ACM
141views Database» more  ICDT 2010»
15 years 10 months ago
The Complexity of Rooted Phylogeny problems
Several computational problems in phylogenetic reconstruction can be formulated as restrictions of the following general problem: given a formula in conjunctive normal form where ...
Manuel Bodirsky, Jens K. Mueller
ECAI
2004
Springer
15 years 11 months ago
Tractable Symmetry Breaking Using Restricted Search Trees
We present a new conceptual abstraction in symmetry breaking – the GE-tree. The construction and traversal of a GE-tree breaks all symmetries in any constraint satisfaction or si...
Colva M. Roney-Dougal, Ian P. Gent, Tom Kelsey, St...
ICALP
2010
Springer
15 years 10 months ago
Preprocessing of Min Ones Problems: A Dichotomy
Min Ones Constraint Satisfaction Problems, i.e., the task of finding a satisfying assignment with at most k true variables (Min Ones SAT(Γ)), can express a number of interesting ...
Stefan Kratsch, Magnus Wahlström
CPAIOR
2007
Springer
16 years 3 days ago
The Linear Programming Polytope of Binary Constraint Problems with Bounded Tree-Width
We show how to efficiently model binary constraint problems (BCP) as integer programs. After considering tree-structured BCPs first, we show that a Sherali-Adams-like procedure r...
Meinolf Sellmann, Luc Mercier, Daniel H. Leventhal
CP
2003
Springer
15 years 11 months ago
An Algebraic Approach to Multi-sorted Constraints
Abstract. Most previous theoretical study of the complexity of the constraint satisfaction problem has considered a simplified version of the problem in which all variables have t...
Andrei A. Bulatov, Peter Jeavons