Etudes interlaboratoires sur les espèces du complexe Obsoletus

Notes sur les Ixodidés du genre Hyalomma (Koch)

Les inscriptions du temps sur les cadrans solaires

Etudes relatives aux ixodidae - les espèces iraniennes du genre haemaphysalis, Koch 1844. Identité d›haemaphysalis cholodkofskyi olenev 1928 et d›h. Cinnabarina var. Cretica senevet et caminopetros 1936

Interrogation de données multimédia fondée sur les connaissances du domaine

In this paper, we present a domain knowledge based approach to retrieve multimedia data described by using the MPEG-7 standard. This standard is used since it provides tools to represent, in the same description, the structural and semantic aspects of the multimedia content. However, due to its XML schema based definition, MPEG-7 lacks ability to describe implicit information and to integrate d...

Sur les sous-groupes nilpotents du groupe de Cremona

We describe the nilpotent subgroups of the group Bir(P(C)) of birational transformations of the complex projective plane. Let N be a nilpotent subgroup of class k > 1; then either each element of N has finite order, or N is virtually metabelian.