1,721,079 research outputs found
Archiconfrérie de Notre-Dame de l'Assomption pour le retour des églises dissidentes
No full textTrombetta A. Archiconfrérie de Notre-Dame de l'Assomption pour le retour des églises dissidentes. In: Échos d'Orient, tome 1, n°11, 1898. pp. 322-328
Discussing drinking with paediatric patients with neurodegenerative conditions raises a wide range of dilemmas
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A remark on weakly convex continuous mappings in topological linear spaces
No full textLet C be a compact convex subset of a Hausdorff topological linear space and T:C→C a continuous mapping. We characterize those mappings T for which T(C) is convexly totally bounded
Examples of proper k-ball contractive retractions in F-normed spaces
No full textAssume X is an infinite dimensional F-normed space and let r be a positive number such that the closed ball Br(X) of radius r is properly contained in X. The main aim of this paper is to give examples of regular F-normed ideal spaces in which there is a 1-ball or a (1 + ε)-ball contractive retraction of Br(X) onto
its boundary with positive lower Hausdorff measure of noncompactness. The examples are based on the abstract results of the paper, obtained under suitable hypotheses on X
Proper 1-ball contractive retractions in spaces of measurable functions
No full textn this paper we consider the Wo ́sko problem ([20]) of evaluating, in an
infinite-dimensional Banach space X, the infimum of all k \ge 1 for which there
exists a k-ball contractive retraction of the unit ball onto its boundary. We
prove that in some classical Banach spaces the best possible value 1 is attained.
Moreover we give estimates of the lower H-measure of noncompactness of the
retractions we construct
Una bambina con sanguinamento perineale ricorrente
No full textA four-year-old girl is evaluated for 8 recurrent episodes of perineal bleeding of undefined origin appeared six months before. Physical examination is normal except for a small anal fissure and a mild congestion of external haemorrhoids during Valsalva maneuver. Different diagnostic hypotheses and treatment options are discussed
Advanced privacy-preserving data management and analysis
No full textThe collection of large amounts of users’ sensible data by services providers such as Google, Yahoo, or Facebook poses several relevant and challenging issues. A particularly relevant problem is how to ensure a suitable degree of statistical analysis over such data without disrupting user privacy. Toward this end, in the past few years several anonymization and privacy-preserving data mining techniques have been proposed. In this work, we propose a survey of such methodologies and techniques with a particular focus on advanced topics, such as privacy preserving management of time-varying anonymized data and privacy-preserving data mining over distributed data
An extension of Guo's theorem via k-psi-contractive retraction
No full textLet X be a infinite-dimensional Banach space. We generalize Guo''s Theorem [D.J. Guo, Eigenvalues and eigenvectors of nonlinear operators, Chinese Ann. Math. 2 (1981) 65–80 [English]] to k-ψ-contractions and condensing mappings, under a condition which depends on the infimum kψ of all k \ge1 for which there exists a k-ψ-contractive retraction of the closed unit ball of the space X onto its boundary
A note on boundary conditions for nonlinear operators
No full textWe investigate
boundary conditions for strict--contractive and
-condensing operators. We derive results on the existence
of eigenvectors with positive and negative eigenvalues and we
obtain fixed point theorems for classes of noncompact
opera\-tors
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