PASCAL - Pattern Analysis, Statistical Modelling and Computational Learning

Mal'tsev + Datalog --> Symmetric Datalog
Victor Dalmau and Benoit Larose
In: Twenty-Third Annual IEEE Symposium on Logic in Computer Science, LICS 2008(2008).


Let B be a finite, core relational structureand let A be the algebra associated to B, i.e.whose terms are the operations on the universeof B that preserve the relations of B. Weshow that if A generates a so-called arithmetical variety then CSP(B), the constraint satisfaction problem associated to B, is solvable inLogspace; in fact??CSP(B) is expressible insymmetric Datalog. In particular, we obtainthat if??CSP(B) is expressible in Datalog andthe relations of B are invariant under a Maltsevoperation then CSP(B) is in symmetric Datalog.

EPrint Type:Conference or Workshop Item (Paper)
Project Keyword:Project Keyword UNSPECIFIED
Subjects:Theory & Algorithms
ID Code:5289
Deposited By:Victor Dalmau
Deposited On:24 March 2009