On Kasner solution in Bianchi I $f(T)$ cosmology

Understand

Recently cosmological dynamics of anisotropic Universe in $f(T)$ gravity became an area of intense investigations.

• Some earlier papers devoted to this issue contain contradictory claims about the nature and propertied of vacuum solutions in this theory.
• The goal of the present paper is to clarify this situation.
• We compare properties of $f(T)$ and $f(R)$ vacuum solutions and outline differences between them.