Search results for "representations"

showing 10 items of 143 documents

Remarks on Infinite-Dimensional Representations of the Heisenberg Algebra

2017

Infinite-dimensional representations of Lie algebras necessarily invoke the theory of unbounded operator algebras. Starting with the familiar example of the Heisenberg Lie algebra, we sketch the essential features of this interaction, distinguishing in particular the cases of integrable and nonintegrable representations. While integrable representations are well understood, nonintegrable representations are quite mysterious objects. We present here a short and didactical-minded overview of the subject.

RepresentationsUnbounded operatorAlgebraLie aalgebraPure mathematicsIntegrable systemSettore MAT/05 - Analisi MatematicaLie algebraSubject (philosophy)Algebra over a fieldSketchMathematics
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Representations of cancer among pupils : a linked influence of the academic and extraccuricular environements

2016

International audience

Representations[ SHS ] Humanities and Social Sciencesacademic environmentcancerextracurricular environment[SHS] Humanities and Social SciencesComputingMilieux_MISCELLANEOUS[SHS]Humanities and Social Sciences
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Education and the belief in meritocracy

2008

This study aims at measuring empirically the belief in meritocracy and analyzing the impact of education on this belief. The research is structured in three parts: – Measuring the hold and the spread of the idea of an educational meritocracy. – Assessing the perceived legitimacy of educational meritocracy – Analyzing the determinants of the belief in meritocracy, especially the schooling effect. Three different types of empirical materials have been used: (1) data from the International Social Survey Program 1999 (Social Inequality (III)), (2) an original survey conducted among students in different courses of study (first year of higher education) in the academy of Caen, and (3) interviews…

Representations[SHS.SOCIO]Humanities and Social Sciences/Sociology[SHS.SOCIO] Humanities and Social Sciences/SociologyReprésentationMeritocracyMéritocratieHigher educationSentiment de justice[ SHS.SOCIO ] Humanities and Social Sciences/SociologyValuesValeurFeeling of justiceEnseignement supérieur
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Review of Daniela Wagner, Die Fünfzehn Zeichen vor dem Jüngsten Gericht: Spätmittelalterliche Bildkonzepte für das Seelenheil, Berlin: Reimer, 2016. …

2019

Settore L-FIL-LET/15 - Filologia GermanicaSigns of Doomsday eschatological literature Medieval Germanic tradition pictorial representations of the Fifteen Signs
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Rappresentazioni e territorio nelle dinamiche del turismo: il caso della Lonely Planet Sicily

2018

L’attuale dibattito sul riordino territoriale del Paese rende nuovamente centrale il concetto di territorio che, da sempre, in una prospettiva geografica pone problemi definitori. Esso può essere, infatti, oggetto di produzioni simboliche e (ri)semantizzazioni in grado di ridefinirlo e di creare specifiche modalità di interazione. A questo proposito, il presente lavoro intende proporre una riflessione su alcune dinamiche di produzione e riproduzione simbolica che interessano il concetto di territorio nel turismo, ambito in cui si può osservare una relazione diretta tra rappresentazione del territorio (intesa anche come narrazione) e possibilità d’azione. In particolare, attraverso il caso s…

Settore M-GGR/02 - Geografia Economico-PoliticaThe current debate about the Italian territorial reorganization makes again fundamental the concept of «territory». This paper aims to reflect on some important dynamics that concern the idea of territory. More in particular I explore in which form it can be (re)semantised through some tourism representations and narrations able to create specific ways of interaction. By taking into account the case study of the Lonely Planet 2017 digital tourist guidebook dedicated to Sicily that splits (and reorganizes) the island in smaller «regions» it is possible to reflect on a complex space dynamic able to redefine the same idea of territory. Indeed the tourist guidebook uses both texts and geographical maps to propose an anthology of homogeneous and coherent destinations to make the Otherness more accessible for the readers. This process demonstrates how symbolic (re)productions of a territory can give rise to specific constructions of places creating different concepts of region and therefore performative spaces and opportunities of «agency». In other terms the (re)definition of the Sicilian territory proposed by the guide invites tourists to consider a new (narrated) geography invites and invites to interact with it thinking as visitors. From a geographical and cultural point of view reflection on these dynamics allows us to consider some (re)definitions of space in relation to forms of textualization (even on the maps). An imaginary but performative geography that attributes to the concept of territory epistemological and gnoseological possibilities.Settore M-GGR/01 - Geografia
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La Religion triomphante, militante et martyre. Piété et valeurs guerrières dans les représentations de l’ordre de Malte

2018

The Order of St. John always paid special attention to the publications documenting its military activities, in order to justify both its mission in defence of the faith and its requests to Christian princes for human and material resources. This editorial investment was particularly strong after the dramatic sieges of Rhodes (1480, 1522) and Malta (1565) by the Ottomans. In 1619, just a few years after the Order’s new landing in Malta, "Il glorioso trionfo della sacrosanta religion militare de’ nobili, valorosi e invitti cavalieri di S. Giovanni Gierosolimitano" was published in Italian and Spanish. This article analyses the narrative strategies used in this text within the context of coev…

Settore M-STO/07 - Storia Del Cristianesimo E Delle ChieseOrder of Malta crusades Christian soldier hagiography representationsOrdre de Malte croisades soldat chrétien hagiographie représentationsSettore M-STO/02 - Storia Moderna
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A combinatorial algorithm related to the geometry of the moduli space of pointed curves

2002

As pointed out in Arbarello and Cornalba ( J. Alg. Geom. 5 (1996), 705–749), a theorem due to Di Francesco, Itzykson, and Zuber (see Di Francesco, Itzykson, and Zuber, Commun. Math. Phys. 151 (1993), 193–219) should yield new relations among cohomology classes of the moduli space of pointed curves. The coefficients appearing in these new relations can be determined by the algorithm we introduce in this paper.

Settore MAT/02 - AlgebraSettore MAT/03 - Geometriarational cohomology class moduli spaces of pointed curvesSchur Q-polynomials; projective representations; moduli space of curves
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On Geometric Simple Connectivity

2010

L'articolo intende dare una visione panoramica su ricerche recenti, molte delle quali sono da attribuire al V.Poenaru, sulla topologia di dimensione basse e sulla teoria geometrica dei gruppi.

Settore MAT/03 - GeometriaHandlesGSC4-dimensional manifolds quasi-simple filtration double-points presentations and (inverse)-representations of groups.
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Zbl 1286.46057 Dowerk, Philip A.; Savchuk, Yurii Induced *-representations and C∗-envelopes of some quantum *-algebras. J. Lie Theory 23, No. 1, 229-…

2013

Settore MAT/05 - Analisi Matematica*-representations
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C*-seminorms and representation on partial *-algebras

2008

In this paper we investigate the *-representations of a partial *-algebra A. In particular, it is proved that, if A is semiassociative and if the set of right multipliers is dense with respect to a seminorm p on A, there exists a bounded and regular *-represenation on A.

Settore MAT/05 - Analisi Matematica*-representations partial *-algebras
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