Black Hole entropy in D=2+1 dimensions from extended Chern-Simons term   in a gravitational background
  We study the contribution to entropy of Black Holes in D=2+1 dimensions from an extension of the Chern Simons theory including higher derivative in a curved space-time. 
Carlos Pinheiro (UFES, Brazil), F.C. Khanna (UofA, Canada)