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Phase space analysis of the F (X) - V (ϕ) 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.

preprint2014arXivOpen access
Josue De-SantiagoJorge L. Cervantes-Cota
astro-ph.COgr-qc
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Josue De-SantiagoJorge L. Cervantes-Cota

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