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The Road to Reality: A Complete Guide to the Laws of the Universe por Roger Penrose
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The road to reality : a complete guide to the laws of the universe

por Roger Penrose

MembrosResenhasPopularidadeAvaliação médiaDiscussões
1,194163,200 (3.95)3
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New York: A.A. Knopf, 2005.

Membro:Jesse_wiedinmyer
Colecções:A sua bibliotecaAvaliação:****1/2
Etiquetas:Physics, Popular Physics, Science, Cosmology, Origins of the Universe, Quantum Mechanics, Quantum Physcis, Relativity
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Mostrando 1-5 de 16 (seguinte | mostrar todas)
This is a concise (despite its length at 1099 pages) summary of much of mathematics and mathematical physics. Penrose has a readable style and is attempting to provide enough understanding of mathematics to illuminate mathematical physics. In the process, he provides a short summary of a loth of different math concepts. While you probably won't master all of them from his summaries, they provide both a good introduction and a good review. ( )
  CaUplWL | Dec 27, 2008 |
This book is a treasure trove. Penrose has distilled thousands of years of hard-won knowledge into a single tome, clear enough to be read by a person of reasonable intelligence. It is on a par with Euclid's elements, a scholarly work laying a path from total ignorance to modern physics. If civilisation were to end, this is one of the few essential books that should be saved. ( )
1 vote Ganzy | Sep 3, 2008 |
I'm putting this book on my "read" shelf, because I feel I've given it due diligence. In fact, I read through the whole first section, which develops the mathematical background needed for the rest of the story. But once I ventured into the section on relativity, which begins by considering Newtonian physics as a gauge connection on a vector bundle, I realized I was in over my head. Luckily I have some experience with mathematical exposition. I wouldn't recommend this book if you don't have that kind of background, though there may be some value in just enjoying the evocative, beautifully drafted diagrams and in savoring abstruse terminology. ( )
2 vote meeisenberg | Aug 13, 2008 |
Ich habe von dem 1100 Seiten Buch erst 80 Seiten gelesen. Die nachfolgende Rezension ist daher bloß ein erster Eindruck und mit Vorsicht zu genießen:

Ich bin auf das Buch von Roger Penrose gestoßen, nachdem ich Brian Greene "Der Stoff, aus dem der Kosmos ist" gelesen habe. Obwohl Greene praktisch ohne Mathematik auskommt (bzw. sie in die Anmerkungen verbannt), wurde mir die instinktive Ahnung geweckt, dass für ein einigermaßen akzeptablen Verständnis auch die dahinterstehende Mathematik notwendig ist.

Das Buch von Roger Penrose ist für diesen Ansatzpunkt genau das Richtige: Es gibt zuerst eine umfassende Einführung (380 Seiten) in die Mathematik, aber nur soweit sie für das Verständnis der modernen Physik relevant ist. Immer wieder wird bei der Erläuterung der mathematischen Konzepte auf Raum und Zeit bzw. die physikalische Realität Bezog genommen. Im zweiten Teil (720 Seiten) werden dann diese mathematische Kenntnisse bei der Erklärung der physikalischen Phänomene angewendet. Es ensteht dadurch tatsächlich ein kompletter Führer zu den physikalischen Gesetzen.

Aus meiner Sicht erfordert das Buch allerdings für ein volles Verständnis und eine entsprechende hohe Wertschätzung doch sehr viel an mathematischem Wissen bzw. an mathematischer Kompetenz – die ich (derzeit ?)nicht habe. Es gibt eine Reihe von mathematischen Übungen, deren Lösungen im Internet nachgeschaut werden können (http://www.roadtoreality.info/ bzw. http://camoo.freeshell.org/roadtoreal...) und das Buch könnte dadurch vielleicht auch als Lehrbuch dienen. Für mich allerdings scheint es einfacher vorher doch eher einen eigenen - für AnfängerInnen extra didaktisch aufbereiteten Text - zu lesen.

Trotzdem ist es aber auch möglich das Buch mit Genuss zu lesen. Die Formeln werden im Text erklärt und es sind vor allem die Schlussfolgerungen, die die Faszination der Materie bzw. des Textes ausmachen. Das Buch kann daher mit etwas Geduld - selbst mit geringen mathematischen Kenntnissen – durchaus mit Genuss gelesen werden. Es kann dann halt nicht jeder Gedankengang nach vollzogen bzw. in seiner Korrektheit überprüft werden.

Das Buch ist sehr gewissenhaft geschrieben und mit vielen Abbildungen ausgestattet. Sowohl die kurzen in sich 34 abgeschlossenen Kapitel als die extrem vielen Querverweise erleichtern den Zugang von verschiedenen Seiten/Stellen aus. ( )
  baumgartner | Jun 17, 2008 |
I am a scientific layperson. (Admittedly a committed one.) I've been reading this book off and on for 2 years, and it continues to reward. As a study guide for interested outsiders who will follow up using other sources, it works well, explaining prerequisites as well as concepts. It is the only work I've ever read gives such complete coverage to classical physics, the standard model, *and* newer developments. For anyone interested in mathematical physics, and especially the geometric nature of mathematical physics, this is highly recommended. ( )
1 vote ztutz | Jun 12, 2008 |
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Amazon.com (ISBN 0679454438, Hardcover)

If Albert Einstein were alive, he would have a copy of The Road to Reality on his bookshelf. So would Isaac Newton. This may be the most complete mathematical explanation of the universe yet published, and Roger Penrose richly deserves the accolades he will receive for it. That said, let us be perfectly clear: this is not an easy book to read. The number of people in the world who can understand everything in it could probably take a taxi together to Penrose's next lecture. Still, math-friendly readers looking for a substantial and possibly even thrillingly difficult intellectual experience should pick up a copy (carefully--it's over a thousand pages long and weighs nearly 4 pounds) and start at the beginning, where Penrose sets out his purpose: to describe "the search for the underlying principles that govern the behavior of our universe." Beginning with the deceptively simple geometry of Pythagoras and the Greeks, Penrose guides readers through the fundamentals--the incontrovertible bricks that hold up the fanciful mathematical structures of later chapters. From such theoretical delights as complex-number calculus, Riemann surfaces, and Clifford bundles, the tour takes us quickly on to the nature of spacetime. The bulk of the book is then devoted to quantum physics, cosmological theories (including Penrose's favored ideas about string theory and universal inflation), and what we know about how the universe is held together. For physicists, mathematicians, and advanced students, The Road to Reality is an essential field guide to the universe. For enthusiastic amateurs, the book is a project to tackle a bit at a time, one with unimaginable intellectual rewards. --Therese Littleton

(retirado da Amazon Fri, 24 Apr 2009 07:58:00 -0400)

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