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A characterization of the Corrado Segre variety
No full textAbstract. In this paper we give a combinatorial characterization of the Corrado Segre variety of type {n,m} in
terms of its incidence structure of points and lines
On the Grassmann space representing the lines of an affine space
No full textIn 1982 Bichara and Mazzocca characterized the Grassmann space Gr(1,A) of the lines of an
affine space A of dimension at least 3 by means of the intersection properties of the three disjoint
families S, S' and T of maximal singular subspaces of Gr(1,A). In this paper we deal with the
characterization of Gr(1,A) using only the families S and S' of maximal singular subspaces
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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