Bøger af Roger Penrose

'One of the most important works...of the twentieth century' The TimesShadows of the Mind is a profound exploration of what modern physics has to tell us about the human mind. A visionary description of what a new physics - one that is adequate to account for our extraordinary brain - might look like.

In a single work of colossal scope one of the world's greatest scientists has given us a complete and unrivalled guide to the glories of the universe that we all inhabit. 'Roger Penrose is the most important physicist to work in relativity theory except for Einstein.

One of the world's leading physicists questions some of the most fashionable ideas in physics today, including string theoryWhat can fashionable ideas, blind faith, or pure fantasy possibly have to do with the scientific quest to understand the universe? Surely, theoretical physicists are immune to mere trends, dogmatic beliefs, or flights of fancy? In fact, acclaimed physicist and bestselling author Roger Penrose argues that researchers working at the extreme frontiers of physics are just as susceptible to these forces as anyone else. In this provocative book, he argues that fashion, faith, and fantasy, while sometimes productive and even essential in physics, may be leading today's researchers astray in three of the field's most important areas-string theory, quantum mechanics, and cosmology.Arguing that string theory has veered away from physical reality by positing six extra hidden dimensions, Penrose cautions that the fashionable nature of a theory can cloud our judgment of its plausibility. In the case of quantum mechanics, its stunning success in explaining the atomic universe has led to an uncritical faith that it must also apply to reasonably massive objects, and Penrose responds by suggesting possible changes in quantum theory. Turning to cosmology, he argues that most of the current fantastical ideas about the origins of the universe cannot be true, but that an even wilder reality may lie behind them. Finally, Penrose describes how fashion, faith, and fantasy have ironically also shaped his own work, from twistor theory, a possible alternative to string theory that is beginning to acquire a fashionable status, to "e;conformal cyclic cosmology,"e; an idea so fantastic that it could be called "e;conformal crazy cosmology."e;The result is an important critique of some of the most significant developments in physics today from one of its most eminent figures.

Einstein said that the most incomprehensible thing about the universe is that it is comprehensible. But was he right? Can the quantum theory of fields and Einstein's general theory of relativity, the two most accurate and successful theories in all of physics, be united into a single quantum theory of gravity? Can quantum and cosmos ever be combined? In The Nature of Space and Time, two of the world's most famous physicists-Stephen Hawking (A Brief History of Time) and Roger Penrose (The Road to Reality)-debate these questions.The authors outline how their positions have further diverged on a number of key issues, including the spatial geometry of the universe, inflationary versus cyclic theories of the cosmos, and the black-hole information-loss paradox. Though much progress has been made, Hawking and Penrose stress that physicists still have further to go in their quest for a quantum theory of gravity.

This incredible 96-page collection contains every single one of the world famous Altair Design patterns and brings together new designs by Roger Burrows, Prof Roger Penrose, Haifa Khawaja and John Martineau. What do you see? Colour it in!

What came before the Big Bang? How did the universe begin and must it inevitably end? This book illuminates some of the deepest mysteries of the universe. It analyses the second law of thermodynamics - according to which the 'randomness' of our world is continually increasing - and examines the light-cone geometry of space-time.

Bilgisayar ekranindaki goruntuler gercek dunyadaki olgularin bire bir temsili midir, yoksa sanal bir dunyada hayal mi gormekteyiz? Sakin evren dedigimiz, muazzam bir bilgisayar ekranindan ibaret olmasin? Bilgisayarlar bilinclendirilebilir mi? Yani akillanip kendi baslarina dusunebilirler mi? Ama bu tur sorulardan once, akil nedir veya bilinc nerededir sorularini da sormamiz gerekmez mi? Roger Penrose, yaniti zor sorulara iliskin goruslerini, bu kitabindan once felsefenin derin tartismalarindan uzak durmus bir matematikci ve temel bilimcinin pratik yaklasimiyla savunuyor. Gorelilik teorisinden kuantum mekanigine ve kozmolojiye uzanan farkli konularin tartisildigi Kralin Yeni Akli'nin ana dusuncesini felsefecilerin "us-beden problemi" olarak adlandirdigi teori olusturuyor.

In the two volumes that comprise this work Roger Penrose and Wolfgang Rindler introduce the calculus of 2-spinors and the theory of twistors, and discuss in detail how these powerful and elegant methods may be used to elucidate the structure and properties of space-time. In volume 1, Two-spinor calculus and relativistic fields, the calculus of 2-spinors is introduced and developed. Volume 2, Spinor and twistor methods in space-time geometry, introduces the theory of twistors, and studies in detail how the theory of twistors and 2-spinors can be applied to the study of space-time. This work will be of great value to all those studying relativity, differential geometry, particle physics and quantum field theory from beginning graduate students to experts in these fields.

This book centers around a dialogue between Roger Penrose and Emanuele Severino about one of most intriguing topics of our times, the comparison of artificial intelligence and natural intelligence, as well as its extension to the notions of human and machine consciousness.Additional insightful essays by Mauro D'Ariano, Federico Faggin, Ines Testoni, Giuseppe Vitiello and an introduction of Fabio Scardigli complete the book and illuminate different aspects of the debate. Although from completely different points of view, all the authors seem to converge on the idea that it is almost impossible to have real "intelligence" without a form of "consciousness". In fact, consciousness, often conceived as an enigmatic "mirror" of reality (but is it really a mirror?), is a phenomenon under intense investigation by science and technology, particularly in recent decades. Where does this phenomenon originate from (in humans, and perhaps also in animals)? Is it reproducible on some "device"? Do we have a theory of consciousness today? Will we arrive to build thinking or conscious machines, as machine learning, or cognitive computing, seem to promise? These questions and other related issues are discussed in the pages of this work, which provides stimulating reading to both specialists and general readers.The Chapter "Hard Problem and Free Will: An Information-Theoretical Approach" is available open access under a Creative Commons Attribution 4.0 International License via link.springer.com.

An accessible, illuminating and stimulating introduction to Roger Penrose's vision of theoretical physics for the twenty-first century. Includes incisive contributions from Abner Shimony, Nancy Cartwright and Stephen Hawking. This is a fascinating account of the problems of modern physics, ranging from small-scale quantum physics to the physics of the Universe.

This volume introduces and systematically develops the calculus of 2-spinors. This is the first detailed exposition of this technique which leads not only to a deeper understanding of the structure of space-time, but also provides shortcuts to some very tedious calculations. Many results are given here for the first time.

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