Left panel: Lagrangian perturbation of temperature (δT/T), along with the scaled nuclear generation rate (ϵ) and the H and He chemical abundances (X_H,X_He) in terms of the normalized stellar radius, for the unstable ℓ = 1,k = 2g mode (Π = 325 s) corresponding to our template model. The black dot marks the location of the outermost maximum of δT/T. Right panel: corresponding differential work function (dW/ dr) in terms of the mass fraction coordinate for the case in which the ε mechanism is allowed to operate (solid black curve) and when it is suppressed (solid red curve). Also shown are the scaled running work integrals, W (dotted curves).