No further gravitational wave modes in $F(T)$ gravity
  We explore the possibility of further gravitational wave modes in $F(T)$
gravity, where $T$ is the torsion scalar in teleparallelism. It is explicitly
demonstrated that gravitational wave modes in $F(T)$ gravity are equivalent to
those in General Relativity. This result is achieved by calculating the
Minkowskian limit for a class of analytic function of $F(T)$. This consequence
is also confirmed by the preservative analysis around the flat background in
the weak field limit with the scalar-tensor representation of $F(T)$ gravity.
