Tidal tensors in the description of gravity and electromagnetism
  In 2008-2009, F. Costa and C. Herdeiro proposed a new gravito-electromagnetic analogy, based on tidal tensors. We show that connections on the tangent bundle of the space-time manifold can help not only in finding a covnenient geometrization of their ideas, but also a common mathematical description of the main equations of gravity and electromagnetism. 
Nicoleta Voicu ("Transilvania" University of Brasov, Romania)
math-ph gr-qc math.DG math.MP