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This sequence of six nines is colloquially known as the "Feynman point", [5] after physicist Richard Feynman, who allegedly stated this same idea in a lecture. [6] However it is not clear when, or even if, Feynman ever made such a statement. It is not mentioned in his memoirs and unknown to his biographer James Gleick. [7]
Richard Phillips Feynman (/ ˈ f aɪ n m ə n /; May 11, 1918 – February 15, 1988) was an American theoretical physicist.He is best known for his work in the path integral formulation of quantum mechanics, the theory of quantum electrodynamics, the physics of the superfluidity of supercooled liquid helium, and in particle physics, for which he proposed the parton model.
The Feynman diagrams are much easier to keep track of than "old-fashioned" terms, because the old-fashioned way treats the particle and antiparticle contributions as separate. Each Feynman diagram is the sum of exponentially many old-fashioned terms, because each internal line can separately represent either a particle or an antiparticle.
A diagrammatic way to represent the resulting sum is via Feynman diagrams, where each term can be evaluated using the position space Feynman rules. A connected Feynman diagram which contributes to the connected six-point correlation function.
There is a sequence of six nines in pi, popularly known as the Feynman point, beginning at the 762nd decimal place of its decimal representation. For a randomly chosen normal number , the probability of a particular sequence of six consecutive digits—of any type, not just a repeating one—to appear this early is 0.08%. [ 7 ]
The Feynman Lectures on Physics is a physics textbook based on a great number of lectures by Richard Feynman, a Nobel laureate who has sometimes been called "The Great Explainer". [1] The lectures were presented before undergraduate students at the California Institute of Technology (Caltech), during 1961–1964.
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The Feynman diagram expansion may be obtained also from the Feynman path integral formulation. [3] The time-ordered vacuum expectation values of polynomials in φ, known as the n-particle Green's functions, are constructed by integrating over all possible fields, normalized by the vacuum expectation value with no external fields,