Necessary conditions for tractability of valued CSPs

The connection between constraint languages and clone theory has been a fruitful line of research on the complexity of constraint satisfaction problems. In a recent result, Cohen et al. [SICOMP’13] have characterised a Galois connection between valued constraint languages and so-called weighted clon...

Full description

Bibliographic Details
Main Authors: Thapper, J, Zivny, S
Format: Journal article
Published: Society for Industrial and Applied Mathematics 2015