5,850 research outputs found

    On the Fekete-Szeg\"o problem for concave univalent functions

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    We consider the Fekete-Szeg\"o problem with real parameter λ\lambda for the class Co(α)Co(\alpha) of concave univalent functions.Comment: 9 page

    Salvaging the Thompson-Chandrasekhar criterion: A tribute to S. Chandrasekhar

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    AbstractThe sole surviving challenge in the linear theory of magnetothermoconvection, which emerges from an unsuccessful attempt of S. Chandrasekhar (Philos. Mag. 743 (1952)) and demands a mathematical proof of the existence of overstable motions when the boundaries are dynamically free and thermally and electrically perfectly conducting, is overcome herewith. As a consequence the linear theory, which prior to 1985 was mostly ridden with conjectures and controversies, is brought to a state of perfection where it is free from any such anomalies and a successful nonlinear investigation of magnetothermoconvection is a distinct possibility

    Stabilization of alluvial channels

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    Submitted to Office of Water Resources Research, U.S. Department of Interior.Includes bibliographical references.Project A-0002-COLO, Grant agreement nos. 14-01-0001-553, 726, 900, 1074, 1625

    Sudden Rise in Amplitude of 40 kHz Radio Signal in Relation to Solar Radio Flux

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    Exciplexes of Polycyclic Aromatic Hydrocarbons with Halomethanes

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    902-90

    Shell model study of the pairing correlations

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    A systematic study of the pairing correlations as a function of temperature and angular momentum has been performed in the sd-shell region using the spherical shell model approach. The pairing correlations have been derived for even-even, even-odd and odd-odd systems near N=Z and also for the asymmetric case of N=Z+4. The results indicate that the pairing content and the behavior of pair correlations is similar in even-even and odd-mass nuclei. For odd-odd N=Z system, angular momentum I=0 state is an isospin, t=1 neutron-proton paired configuration. Further, these t=1 correlations are shown to be dramatically reduced for the asymmetric case of N=Z+4. The shell model results obtained are qualitatively explained within a simplified degenerate model
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