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Fig. 10.

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Profiles of Π, Π′, and difference ∇ − ∇e across the most external convective regions of a low-mass star. Left panel: ratios Π and Π′ are compared and found in good qualitative agreement. Right panel: difference ∇ − ∇e as a function of position (log P). The maximum difference between the two gradients occurs at the layer of the adiabatic fall.

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