Phase space analysis of the F (X) - V (\phi) scalar field Lagrangian and
  scaling solutions in flat cosmology
  We review a system of autonomous differential equations developed in our
previous work [1] describing a flat cosmology filled with a barotropic fluid
and a scalar field with a modified kinetic term of the form L=F(X)-V(phi). We
analyze the critical points and summarize the conditions to obtain scaling
solutions. We consider a set of transformations and show that they leave
invariant the equations of motion for the systems in which the scaling solution
is obtained, allowing to reduce the number of degrees of freedom.
