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    A topological invariant to predict the three-dimensional writhe of ideal configurations of knots and links
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    PNAS April 11, 2000 97 (8) 3795-3798; https://doi.org/10.1073/pnas.97.8.3795
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    Characteristic length scale of the intermediate structure in zero-pressure-gradient boundary layer flow
    G. I. Barenblatt, A. J. Chorin, and V. M. Prostokishin
    PNAS April 11, 2000 97 (8) 3799-3802; https://doi.org/10.1073/pnas.97.8.3799
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    Optimal prediction and the Mori–Zwanzig representation of irreversible processes
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    PNAS March 28, 2000 97 (7) 2968-2973; https://doi.org/10.1073/pnas.97.7.2968
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    Very intense pulse in the groundwater flow in fissurized-porous stratum
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    Effective dimensional reduction algorithm for eigenvalue problems for thin elastic structures: A paradigm in three dimensions
    Evgueni E. Ovtchinnikov and Leonidas S. Xanthis
    PNAS February 1, 2000 97 (3) 967-971; https://doi.org/10.1073/pnas.97.3.967
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    Dissociation of HIV-1 from follicular dendritic cells during HAART: Mathematical analysis
    William S. Hlavacek, Carla Wofsy, and Alan S. Perelson
    PNAS December 21, 1999 96 (26) 14681-14686; https://doi.org/10.1073/pnas.96.26.14681
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    Models for stochastic climate prediction
    Andrew J. Majda, Ilya Timofeyev, and Eric Vanden Eijnden
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    A simple explanation for taxon abundance patterns
    Johan Chu and Christoph Adami
    PNAS December 21, 1999 96 (26) 15017-15019; https://doi.org/10.1073/pnas.96.26.15017
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    Residual delay maps unveil global patterns of atmospheric nonlinearity and produce improved local forecasts
    George Sugihara, Martin Casdagli, Edward Habjan, Dale Hess, Paul Dixon, and Greg Holland
    PNAS December 7, 1999 96 (25) 14210-14215; https://doi.org/10.1073/pnas.96.25.14210
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    Spectral bifurcations in dispersive wave turbulence
    David Cai, Andrew J. Majda, David W. McLaughlin, and Esteban G. Tabak
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