Until now we have made no claims on the stability of locale to the left, right or at the Hayashi limit in the Hertzsprung–Russell diagram. To the left of the Hayashi limit, we have ∇ ∇ < ∇ ∇ a d i a b a t i c and some part of the model is radiative. The model is fully convective at the Hayashi limit with ∇ ∇ = ∇ ∇ a d i a b a t i c . Models to the right of the Hayashi limit should have ∇ ∇ > ∇ ∇ a d i a b a t i c .