Area-charge inequality for black holes
  The inequality between area and charge $A\geq 4\pi Q^2$ for dynamical black holes is proved. No symmetry assumption is made and charged matter fields are included. Extensions of this inequality are also proved for regions in the spacetime which are not necessarily black hole boundaries. 
Sergio Dain and Jos\'e Luis Jaramillo and Mart\'in Reiris
gr-qc