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What is the FPUT problem?

Point (geometry)

Imputation (statistics)

Equipartition theorem

Fermi Gamma-ray Space Telescope

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The Fermi-Pasta-Ulam-Tsingou (FPUT) problem refers to the equilibration of energy in a system. Most studies on the FPUT problem have focused on the equipartition of energy among the normal modes of the system . However, recent work has considered the problem in terms of local variables and spatially localized energy . The time scales for equipartition of space localized degrees of freedom are found to be significantly different from those observed for normal modes . Measuring thermalization in classical systems requires averaging over initial conditions or over time or spatial averaging . The equilibration time of the system, which quantifies its thermalization properties, can be related to chaos in the system . The FPUT problem has implications for the study of integrability and chaos in classical systems .

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Proceedings Article•DOI The Missing Input Problem Emil Laftchiev, Qing Yan, Daniel Nikovski - Show less +2 more 10 Dec 2020	The provided paper does not mention the FPUT problem. The paper discusses the "missing input problem" in data collection and proposes solutions for improving the reliability of data collection in IoT systems.
Open access•Journal Article•DOI Thermalization of Local Observables in the $$\alpha $$-FPUT Chain Santhosh Ganapa, Amit Apte, Abhishek Dhar - Show less +2 more 09 Jun 2020-Journal of Statistical Physics 5 Citations	The paper does not explicitly define the FPUT problem.
Journal Article•DOI FPAT—A Framework for Facilitating the Teaching and Learning of Using Fermi Problems Originating in Mathematics Education Research Jonas Bergman Ärlebäck, Lluís Albarracín - Show less +1 more 01 Oct 2022-The Physics Teacher	The provided paper does not mention the FPUT problem. The paper is about the use of Fermi problems in mathematics education research.
Open access•Journal Article•DOI Thermalization of local observables in the $\alpha$-FPUT chain Santhosh Ganapa, Amit Apte, Abhishek Dhar - Show less +2 more 09 Nov 2019-arXiv: Statistical Mechanics 3 Citations	The paper does not explicitly define the FPUT problem.

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