20 Juin 2013 adminFrumam – François Brucker (Centrale Marseille, LIF) : Latticial Approach for clustering problemsCarte non disponible Date/heure Date(s) - 20/06/201314 h 00 min - 15 h 00 min Catégories Pas de Catégories Latticial Approach for clustering problems By François Brucker, Centrale Marseille, LIF. We present a combinatorial model which generalizes phylogenetic trees. This model links together a graph model (strongly chordal graphs), a lattice model (crown-free lattices) and a clustering model (chordal quasi-ultrametrics). This structure allows to model networks and to associate attributes/labels to data. In classification, this kind of approximation yields a global visualization of the clusters and their relationships through dedicated 2-dimensional or 3-dimensional representations. It can be seen as a compromise between hierarchies (simple struc- ture; easy to interpret) and general lattices (rich interactions between elements; hard to interpret). We conclude be some open problems and possible links between this approach and machine learning methods like decision tree.