Left panel: structural profile of in red, showing the plateau in the convective core. In blue, an example of the adaptation of a target function to include the trace of the convective core and its border. The target function is plotted in its non-dimensional form. Right panel: structural kernels associated with S_5/3 in the (S_5/3,Γ₁) structural pair, showing the trace of the entropy plateau in the convective core in the central regions. The model used is Target 6 of Table 3. The kernels are plotted in their non-dimensional form.