Bipartite Riemann-Finsler geometry and Lorentz violation
  Bipartite Riemann-Finsler geometries with complementary Finsler structures are constructed. Calculable examples are presented based on a bilinear-form coefficient for explicit Lorentz violation. 
Alan Kostelecky, Neil Russell, and Rhondale Tso
hep-th gr-qc hep-ph math.DG