: Mathématiques: period

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period

In algebraic geometry, a period is a number that can be expressed as an integral of an algebraic function over an algebraic domain. Sums and products of periods remain periods, so the periods form a ring. Maxim Kontsevich and Don Zagier gave a survey of periods and introduced some conjectures about them. Periods also arise in computing the integrals that arise from Feynman diagrams, and there has been intensive work trying to understand the connections.
(Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Period_(algebraic_geometry))

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