126 research outputs found

    A note on comonotonicity and positivity of the control components of decoupled quadratic FBSDE

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    In this small note we are concerned with the solution of Forward-Backward Stochastic Differential Equations (FBSDE) with drivers that grow quadratically in the control component (quadratic growth FBSDE or qgFBSDE). The main theorem is a comparison result that allows comparing componentwise the signs of the control processes of two different qgFBSDE. As a byproduct one obtains conditions that allow establishing the positivity of the control process.Comment: accepted for publicatio

    Transverse sphericity of primary charged particles in minimum bias proton–proton collisions at √s = 0.9, 2.76 and 7 TeV

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    Measurements of the sphericity of primary charged particles in minimum bias proton–proton collisions at s√=0.9, 2.76 and 7 TeV with the ALICE detector at the LHC are presented. The observable is measured in the plane perpendicular to the beam direction using primary charged tracks with p T>0.5 GeV/c in |η|<0.8. The mean sphericity as a function of the charged particle multiplicity at mid-rapidity (N ch) is reported for events with different p T scales (“soft” and “hard”) defined by the transverse momentum of the leading particle. In addition, the mean charged particle transverse momentum versus multiplicity is presented for the different event classes, and the sphericity distributions in bins of multiplicity are presented. The data are compared with calculations of standard Monte Carlo event generators. The transverse sphericity is found to grow with multiplicity at all collision energies, with a steeper rise at low N ch, whereas the event generators show an opposite tendency. The combined study of the sphericity and the mean p T with multiplicity indicates that most of the tested event generators produce events with higher multiplicity by generating more back-to-back jets resulting in decreased sphericity (and isotropy). The PYTHIA6 generator with tune PERUGIA-2011 exhibits a noticeable improvement in describing the data, compared to the other tested generators

    Long-range angular correlations on the near and away side in p&#8211;Pb collisions at

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    Underlying Event measurements in pp collisions at s=0.9 \sqrt {s} = 0.9 and 7 TeV with the ALICE experiment at the LHC

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    Claudio Magris: un germanista dall’aula ai giornali

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    Claudio Magris ha portato avanti la sua ricerca universitaria come germanista in parallelo alla sua attività di publicista sui quotidiani. Inizialmente non si trattava degli stessi argomenti anche se nel corso del tempo gli articoli giornalistici diventeranno parte dei suoi libri. Il presente articolo dà conto di moltissimi dei pezzi pubblicati durante i primi anni (impossibile, qui, riferire di tutti), mettendo così in rilievo i temi da lui letti e studiati, e parla dei suoi maestri: Giovanni Getto, Leonello Vincenti, Sergio Lupi. A essi si aggiungono la figure di Ladislao Mittner e Giuliano Baioni. Le indagini sull’idea di Mitteleuropa nella letteratura moderna proseguono gli autori di origine ebraica ad essa. Magris intende la letteratura nel suo contesto storico, da qui l’importanza della storia nei suoi lavori. Docente alle Università di Torino e Trieste, nelle sue lezioni affronta anche autori contemporanei e viventi, come I.B. Singer e E. Canetti. Ma la ricerca germanistica di Magris oltrepassa sempre il recinto delle aule universitarie per farsi conoscere della società italiana

    In processu admodum illustrium Dominorum Dipputatorum Praesentis Regni Aragonum. Super Iurisfirma. Por el Reyno.

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    Mala calidad de papel y tinta.Copia digital. Zaragoza, 200
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