François Truffaut l’a montré à de multiples reprises : il est l’un des grands épistoliers la seconde moitié du xxe siècle. Par masse lettres écrites — plusieurs milliers, par jour l’adolescence mort —, leur variété, diversité personnes auxquelles s’adressait. Et l’inégalable pouvoir qu’il conférait une puissance séduction, conviction, confession, d’information et polémique, portée, selon tous c...

In many geographical applications there is a need to model spatial phenomena not simply by sharp objects but rather through indeterminate or vague concepts. To support such applications we present a model of vague regions which covers and extends previous approaches. The formal framework is based on a general exact model of spatial data types. On the one hand, this simplifies the definition of ...

This paper is devoted to the study of double domination in vague graphs, and it a contribution Special Issue “Advances graph theory Symmetry/Asymmetry” Symmetry. Symmetry one most important criteria that illustrate structure properties fuzzy graphs. It has many applications dominating sets helps find suitable place for construction. Vague graphs (VGs), which are family (FGs), well-organized use...