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[null,"1.","Record Nr.",null,"UNINA9910151933603321"]
[null,null,"Autore",null,"Christodoulou Demetrios"]
[null,null,"Titolo",null,"The Formation of Black Holes in General Relativity [[electronic resource] /] / Demetrios Christodoulou"]
[null,null,"Pubbl/distr/stampa",null,"Zuerich, Switzerland, : European Mathematical Society Publishing House, 2009"]
[null,null,"ISBN",null,"3-03719-568-1"]
[null,null,"Descrizione fisica",null,"1 online resource (599 pages)"]
[null,null,"Collana",null,"EMS Monographs in Mathematics (EMM) ; , 2523-5192"]
[null,null,"Classificazione",null,"83-xx35-xx58-xx"]
[null,null,"Soggetti",null,"General relativity"]
[{"$nulls":4},"Relativity and gravitational theory"]
[{"$nulls":4},"Partial differential equations"]
[{"$nulls":4},"Global analysis, analysis on manifolds"]
[null,null,"Lingua di pubblicazione",null,"Inglese"]
[null,null,"Formato",null,"Materiale a stampa"]
[null,null,null,"Livello bibliografico","Monografia"]
[null,null,null,"Sommario/riassunto","In 1965 Penrose introduced the fundamental concept of a trapped surface, on the basis of which he proved a theorem which asserts that a spacetime containing such a surface must come to an end. The presence of a trapped surface implies, moreover, that there is a region of spacetime, the black hole, which is inaccessible to observation from infinity.  A major challenge since that time has been to find out how trapped surfaces actually form, by analyzing the dynamics of gravitational collapse. The present monograph achieves this aim by establishing the formation of trapped surfaces in pure general relativity through the focusing of gravitational waves.  The theorems proved in the present monograph constitute the first foray into the long-time dynamics of general relativity in the large, that is, when the initial data are no longer confined to a suitable neighborhood of trivial data. The main new method, the short pulse method, applies to general systems of Euler-Lagrange equations of hyperbolic type, and provides the means to tackle problems which have hitherto seemed unapproachable.  This monograph will be of interest to people working in general relativity, geometric analysis, and partial differential equations."]
[null,"2.","Record Nr.",null,"UNINA9910785682703321"]
[null,null,"Autore",null,"Raphael Kate"]
[null,null,"Titolo",null,"Muslim fortresses in the Levant : between crusaders and Mongols / / Kate Raphael"]
[null,null,"Pubbl/distr/stampa",null,"Abingdon, Oxon ; ; New York : , : Routledge, , 2011"]
[null,null,"ISBN",null,"1-136-92525-2"]
[{"$nulls":4},"1-136-92526-0"]
[{"$nulls":4},"1-283-03851-X"]
[{"$nulls":4},"9786613038517"]
[{"$nulls":4},"0-203-84516-1"]
[null,null,"Descrizione fisica",null,"1 online resource (284 p.)"]
[null,null,"Collana",null,"Culture and civilization in the Middle East ; ; 23"]
[null,null,"Disciplina",null,"725/.18"]
[null,null,"Soggetti",null,"Fortification - Egypt - History - To 1500"]
[{"$nulls":4},"Military architecture - Egypt - History - To 1500"]
[{"$nulls":4},"Siege warfare - Egypt - History - To 1500"]
[{"$nulls":4},"Architecture, Ayyubid - Egypt"]
[{"$nulls":4},"Architecture, Mameluke - Egypt"]
[{"$nulls":4},"Egypt History, Military To 1500"]
[null,null,"Lingua di pubblicazione",null,"Inglese"]
[null,null,"Formato",null,"Materiale a stampa"]
[null,null,null,"Livello bibliografico","Monografia"]
[null,null,null,"Note generali","Description based upon print version of record."]
[null,null,null,"Nota di bibliografia","Includes bibliographical references (p. [215]-261) and index."]
[null,null,"Nota di contenuto",null,"Ayyubid fortresses in the late twelfth and early thirteenth centuries: -- Muslims' apprenticeship -- Mongolian siege warfare and the defense of Mamluk fortresses -- Laying the foundations : fortification work conducted during the reign of Baybars (1260-1277), Qalawun (1280-1290) and al-Ashraf Khalil (1290-1293) -- Mamluk power on display : fortifications in the second half of the thirteenth century -- Military architecture versus political and military organization."]
[null,null,null,"Sommario/riassunto","During much of the twelfth century the Crusaders dominated the military scene in the Levant. The unification of Egypt and Syria by Saladin gradually changed the balance of power, which slowly begun to tilt in favour of the Muslims. This book examines the development and role of Muslim fortresses in the Levant at the time of the Crusaders and the Mongol invasion, situating the study within a broad historical, political and military context.Exploring the unification of Egypt with a large part of Syria and its effect on the balance of power in the region, Raphael gives a historical over"]