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Soluble normally constrained pro-p-groups
No full textA pro-p-group G is said to be normally constrained (or, equivalently, of obliquity zero) if every open normal subgroup of G is trapped between two consecutive terms of the lower central series of G. In this paper infinite soluble normally constrained pro-p-groups, for an odd prime p, are shown to be 2-generated. A classification of such groups, up to the isomorphism type of their associated Lie algebra, is provided in the finite coclass case, for p > 3. Moreover, we give an example of an infinite soluble normally constrained pro-p-group whose lattice of open normal subgroups is isomorphic to that of the Nottingham group. Some general results on the structure of soluble just infinite pro-p-groups are proved on the way. © Walter de Gruyter 2007
Pro-p groups with waists
No full textA waist W of a pro-p group G is a subgroup which is comparable
with any open normal subgroup of G. The position of W with
respect to the terms of a central series of G is studied here. If p is
odd, with some natural hypotheses we show that W is a term of
both the lower and upper central series of G
Profinite groups with finite virtual length
No full textIn this paper we introduce the notion of finite virtual length for profinite groups (that is, every series has a bounded number of infinite factors) and we prove a Jordan–Hölder type theorem for profinite groups with finite virtual length. More structural results are provided in the pronilpotent and p-adic analytic cases
Paroxysmal rhythmic pelvic movements: an unusual paediatric presentation of Chiari I malformation with syringomyelia
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Stile strutturale dei Monti Reatini e dei Monti Sabini settentrionali (Appennino centrale) a confronto
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Completamento delle conoscenze naturalistiche di base: sviluppi delle conoscenze sulle “emergenze” della flora vascolare italiana.
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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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