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1. |
Record Nr. |
UNINA9910151932503321 |
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Autore |
Ringström Hans |
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Titolo |
The Cauchy Problem in General Relativity [[electronic resource] /] / Hans Ringström |
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Pubbl/distr/stampa |
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Zuerich, Switzerland, : European Mathematical Society Publishing House, 2009 |
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ISBN |
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Descrizione fisica |
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1 online resource (307 pages) |
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Collana |
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ESI Lectures in Mathematics and Physics (ESI) |
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Classificazione |
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Soggetti |
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Differential equations |
Relativity and gravitational theory |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Sommario/riassunto |
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The general theory of relativity is a theory of manifolds equipped with Lorentz metrics and fields which describe the matter content. Einstein's equations equate the Einstein tensor (a curvature quantity associated with the Lorentz metric) with the stress energy tensor (an object constructed using the matter fields). In addition, there are equations describing the evolution of the matter. Using symmetry as a guiding principle, one is naturally led to the Schwarzschild and Friedmann-Lemaître-Robertson-Walker solutions, modelling an isolated system and the entire universe respectively. In a different approach, formulating Einstein's equations as an initial value problem allows a closer study of their solutions. This book first provides a definition of the concept of initial data and a proof of the correspondence between initial data and development. It turns out that some initial data allow non-isometric maximal developments, complicating the uniqueness issue. The second half of the book is concerned with this and related problems, such as strong cosmic censorship. The book presents complete proofs of several classical results that play a central role in mathematical relativity but are not easily accessible to those wishing to enter the subject. Prerequisites are a good knowledge of basic measure and integration theory as well as the fundamentals of Lorentz geometry. The necessary background from the theory of partial |
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differential equations and Lorentz geometry is included. |
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2. |
Record Nr. |
UNINA9910959862203321 |
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Autore |
Hanson Christopher (Christopher C. P.) |
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Titolo |
Game Time : Understanding Temporality in Video Games / / Christopher Hanson |
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Pubbl/distr/stampa |
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Bloomington, Indiana, : Indiana University Press, 2018 |
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ISBN |
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9780253032836 |
0253032830 |
9780253032782 |
0253032784 |
9780253032829 |
0253032822 |
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Edizione |
[1st ed.] |
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Descrizione fisica |
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1 online resource (248 pages) |
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Collana |
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Disciplina |
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Soggetti |
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Time perception |
Video games - Psychological aspects |
Electronic books. |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Nota di bibliografia |
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Includes bibliographical references and index. |
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Nota di contenuto |
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More than live : game "a-liveness" and immediacy -- Game presence and mediatization -- Pausing and resuming -- Saving and restoring -- An instinct towards repetition : "replay value," mastery, and re-creation -- Recursive temporalities -- Case studies. |
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Sommario/riassunto |
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When compared to analog tabletop games, sports, film, television, and other forms of media, Hanson demonstrates that the temporal structures of digital games provide unique opportunities to engage players with liveness, causality, potentiality, and lived experience that create new ways of experiencing time Featuring comparative analysis of key video games titles--including Braid, Quantum Break, Battle of the Bulge, Prince of Persia: The Sands of Time, Passage, The Legend of Zelda: The Ocarina of Time, Lifeline, and A Dark Room. |
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