Freeman Dyson
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Freeman Dyson was a theoretical physicist and mathematician who lived from 1923 to 2020 and made significant contributions to fundamental physics. His work bridged mathematics and physics in ways that influenced modern scientific understanding, making him an important figure in 20th-century science.
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Freeman John Dyson (15 December 1923 – 28 February 2020) was a British-American theoretical physicist and mathematician known for his works in quantum field theory, astrophysics, random matrices, mathematical formulation of quantum mechanics, condensed matter physics, nuclear physics, and engineering. He was professor emeritus in the Institute for Advanced Study in Princeton and a member of the board of sponsors of the Bulletin of the Atomic Scientists.
Dyson originated several concepts that bear his name, such as Dyson's transform, a fundamental technique in additive number theory, which he developed as part of his proof of Mann's theorem; the Dyson tree, a hypothetical genetically engineered plant capable of growing in a comet; the Dyson series, a perturbative series where each term is represented by Feynman diagrams; the Dyson sphere, a thought experiment that attempts to explain how a space-faring civilization would meet its energy requirements with a hypothetical megastructure that completely encompasses a star and captures a large percentage of its power output; and Dyson's eternal intelligence, a means by which an immortal society of intelligent beings in an open universe could escape the prospect of the heat death of the universe by extending subjective time to infinity while expending only a finite amount of energy.
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1923 births2020 deaths20th-century American mathematicians20th-century American physicists20th-century British physicists20th-century English mathematicians21st-century American mathematicians21st-century American memoirists21st-century American physicists21st-century British physicists21st-century English mathematicians21st-century English memoirists