The rotation of galaxies as a consequence of a rotation of the Universe
  Assuming a suitable rotation of the Universe as a whole, we can attribute the rotation of galaxies to it. Using Lagrangian Mechanics we then can find the equations governing the rotation of a galaxy. We find in this way the azimuthal equation, and we find its first integral. Then we derive from it the law of differrential rotation of galaxies, and we plot it. We also present the resulting flat rotation curve, which is found to resemble remarkably the observed rotation curves. 
Evangelos Chaliasos