Documents for modified gravity theories.

f(R) gravity

f(R) gravity background equations and perturbation equations:

https://raw.github.com/CosmologyTaskForce/ModiGraviDoc/master/ModifiedGravityDoc.nb

Disformal dark enrgy

background equations and perturbation equations

https://raw.github.com/CosmologyTaskForce/ModiGraviDoc/master/ModifiedGravityDoc.nb