Properties around the core of 1 M_⊙, solar metallicity models computed with the maximal overshoot (solid blue), overmixing (dashed pink), penetrative convection (dotted green), and semiconvection (dash-dotted yellow) core boundary mixing schemes. Panel a: radiative and adiabatic gradients. Panel b: temperature gradients (∇ = ∂lnT/∂lnP). Panel c: Brunt–Väisälä frequency profile. Panel d: helium composition profile.