Harmonized forest categories in central Italy
نویسندگان
چکیده
منابع مشابه
Forest Categories
A growing body of research into the expressive power of logics on trees has employed algebraic methods—especially the syntactic forest algebra, a generalization of the syntactic monoid of regular languages. Here we enlarge the mathematical foundations of this study by extending Tilson’s theory of the algebra of finite categories, and in particular, the Derived Category Theorem, to the setting o...
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15 صفحه اولHigher Central Extensions in Mal'tsev Categories
Higher dimensional central extensions of groups were introduced by G. Janelidze as particular instances of the abstract notion of covering morphism from categorical Galois theory. More recently, the notion has been extended to and studied in arbitrary semi-abelian categories. Here, we further extend the scope to exact Mal’tsev categories and beyond. For this, we consider conditions on a Galois ...
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The insertion and the permanence of central venous catheters (CVC) represent potential sources of infection contracted in hospital. The evaluation of the risk of CVC-associated infections was evaluated in a retrospective study during the period 2007-2010 in a Hospital of Central Italy. A total of 514 CVC were collected and examined by microbiological techniques and, among the examined patients,...
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ژورنال
عنوان ژورنال: Journal of Maps
سال: 2016
ISSN: 1744-5647
DOI: 10.1080/17445647.2016.1161437