 
                                                                                | Article ID: | iaor20084071 | 
| Country: | Netherlands | 
| Volume: | 175 | 
| Issue: | 1 | 
| Start Page Number: | 155 | 
| End Page Number: | 170 | 
| Publication Date: | Nov 2006 | 
| Journal: | European Journal of Operational Research | 
| Authors: | Pirlot Marc, Roubens Marc, Bisdorff Raymond | 
| Keywords: | fuzzy sets | 
We explore the extension of the notion of kernel (independent, dominant or absorbent, non-empty subset) of a digraph to valued graphs (or valued relations), We define various natural extensions and show the relationship between them, This work has potential interest for applications in choice decision problems.