Comment on "Chaotic orbits for spinning particles in Schwarzschild   spacetime"
  The astrophysical relevance of chaos for a test particle with spin moving in Schwarzschild spacetime was the objective of \cite{Verhaaren10}. Even if the results of the study seem to be qualitatively in agreement with similar works, the study presented in \cite{Verhaaren10} suffers both from theoretical and technical issues. These issues are discussed in this comment. 
Georgios Lukes-Gerakopoulos
gr-qc nlin.CD