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Paul Adrien Maurice Dirac was one of the founders of quantum theory. He is numbered alongside Newton, Maxwell and Einstein as one of the greatest physicists of all time. Together the lectures in this volume, originally presented on the occasion of the dedication ceremony for a plaque commemorating Dirac in Westminster Abbey, give a unique insight into the relationship between Dirac's character and his scientific achievements. The text begins with the dedication address given by Stephen Hawking at the ceremony. Then Abraham Pais describes Dirac as a person and his approach to his work. Maurice Jacob explains how Dirac was led to introduce the concept of antimatter, and its central role in modern particle physics and cosmology, followed by an account by David Olive of the origin and enduring influence of Dirac's work on magnetic monopoles. Finally, Sir Michael Atiyah explains the deep and widespread significance of the Dirac equation in mathematics.

Physicists --- Dirac, P. A. M.

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Perhaps the two most important conceptual breakthroughs in twentieth century physics are relativity and quantum mechanics. Developing a theory that combines the two seamlessly is a difficult and ongoing challenge. This accessible book contains intriguing explorations of this theme by the distinguished physicists Richard Feynman and Steven Weinberg. Richard Feynman's contribution examines the nature of antiparticles, and in particular the relationship between quantum spin and statistics. In his essay, Steven Weinberg speculates on how Einstein's theory of gravitation might be reconciled with quantum theory in the final laws of physics. Both these Nobel laureates have made huge contributions to fundamental research in physics, as well as to the popularization of science. Anyone interested in the development of modern physics will find this a fascinating book.

Particles (Nuclear physics) --- Quantum theory. --- Relativity (Physics) --- Dirac, P. A. M.

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Dirac, Paul A.M. --- Physicists --- -Physical scientists --- Biography --- Dirac, P. A. M. --- -Biography --- Dirac, Paul Adrien Maurice, --- Dirac, Paul A. M. --- Dirak, Polʹ, --- Great Britain --- Dirac, P. A. M. (Paul Adrien Maurice), 1902 --- -Physicists - Great Britain - Biography.

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This monograph contains a functional analytic introduction to Dirac's formalism. The first part presents some new mathematical notions in the setting of triples of Hilbert spaces, mentioning the concept of Dirac basis. The second part introduces a conceptually new theory of generalized functions, integrating the notions of the first part. The last part of the book is devoted to a mathematical interpretation of the main features of Dirac's formalism. It involves a pairing between distributional bras and kets, continuum expansions and continuum matrices.

Quantum theory. --- Théorie quantique --- Dirac, P. A. M. --- Quantum theory --- Dirac, P A M --- 517.98 --- Quantum dynamics --- Quantum mechanics --- Quantum physics --- Physics --- Mechanics --- Thermodynamics --- Functional analysis and operator theory --- 517.98 Functional analysis and operator theory --- Dirac, Paul Adrien Maurice, --- Dirac, Paul A. M. --- Dirak, Polʹ, --- Dirac, P A M - (Paul Adrien Maurice), - 1902-1984

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The main focus of this book is on the interconnection of two unorthodox scientific ideas, the varying-gravity hypothesis and the expanding-earth hypothesis. As such, it provides a fascinating insight into a nearly forgotten chapter in both the history of cosmology and the history of the earth sciences. The hypothesis that the force of gravity decreases over cosmic time was first proposed by Paul Dirac in 1937. In this book the author examines in detail the historical development of Dirac’s hypothesis and its consequences for the structure and history of the earth, the most important of which was that the earth must have been smaller in the past.

Mathematics. --- Cosmology. --- Geophysics. --- Dirac, P. A. M. --- Geological physics --- Terrestrial physics --- Earth sciences --- Physics --- Astronomy --- Deism --- Metaphysics --- History of Mathematical Sciences. --- Geophysics and Environmental Physics. --- History. --- Annals --- Auxiliary sciences of history --- Math --- Science