in this paper we introduce the concept of generalized baer-invariant of a pair of groups with respect to two varieties ? and ? of groups. we give some inequalities for the generalized baer-invariant of a pair of finite groups, when ? is considered to be the schur-baer variety. further, we present a sufficient condition under which the order of the generalized baer-invariant of a pair of finite ...

Abstract. For this first participation to ImageClef Plant Identification, we build on the reference Bag-of-Word framework (BoW). We extract Points-of-Interest (PoI) using the SIFT detector in every image and describe each local feature with the SIFT descriptor. The visual dictionary is built with a K-means algorithm of 100 clusters on the local features. Each image is then represented by its hi...