102 research outputs found

    The \infty eigenvalue problem and a problem of optimal transportation

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    The so-called eigenvalues and eigenfunctions of the infinite Laplacian Δ∞\Delta_\infty are defined through an asymptotic study of that of the usual pp-Laplacian Δp\Delta_p, this brings to a characterization via a non-linear eigenvalue problem for a PDE satisfied in the viscosity sense. In this paper, we obtain an other characterization of the first eigenvalue via a problem of optimal transportation, and recover properties of the first eigenvalue and corresponding positive eigenfunctions

    Experimental study of radiative shocks at PALS facility

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    We report on the investigation of strong radiative shocks generated with the high energy, sub-nanosecond iodine laser at PALS. These shock waves are characterized by a developed radiative precursor and their dynamics is analyzed over long time scales (~50 ns), approaching a quasi-stationary limit. We present the first preliminary results on the rear side XUV spectroscopy. These studies are relevant to the understanding of the spectroscopic signatures of accretion shocks in Classical T Tauri Stars.Comment: 21 pages, 1 table, 7 figure
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