Member ryujin::quadratic_newton_step (Number &p_1, Number &p_2, const Number phi_p_1, const Number phi_p_2, const Number dphi_p_1, const Number dphi_p_2, const Number sign=Number(1.0))
Write out the quadratic Newton step in more detail.
Remove this class alltogether by generalizing the core ingredients of all StubSolver implementation(s) for the different equations and put them into ParabolicModule (with equation-dependent code in ParabolicSystem).