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Fig. 4.

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Averaging resolving kernel (in red) plotted in comparison with the target kernel (in green) for the inversion of a set of 20 artificial splittings with l = 1 calculated for the best-fit model of the red giant KIC 4448777. Top panel: inversion of artificial data with errors equal to 15 nHz and a trade-off parameter μ = 140. Bottom panel: inversion of artificial data with real errors and μ = 3800.

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