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Identifiant HAL de l’IMB = 50
Date de dépôt = 2016

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  • [hal-01308641] Towards a symplectic version of the Chevalley restriction theorem

    1er mars, par Michael Bulois, Christian Lehn, Manfred Lehn, Ronan Terpereau
    If (G,V) is a polar representation with Cartan subspace c and Weyl group W, it is shown that there is a natural morphism of Poisson schemes (c+c*)/W->(V+V*)///G. This morphism is conjectured to be an isomorphism of the underlying reduced varieties if (G,V) is visible. The conjecture is (...)
  • [hal-01342210] An algebraic continuous time parameter estimation for a sum of sinusoidal waveform signals

    26 janvier, par Rosane Ushirobira, Wilfrid Perruquetti, Mamadou Mboup
    In this paper, a novel algebraic method is proposed to estimate amplitudes, frequencies, and phases of a biased and noisy sum of complex exponential sinusoidal signals. The resulting parameter estimates are given by original closed formulas, constructed as integrals acting as time-varying (...)