One dimensional exactly solvable models of strongly correlated electrons   of $1/r^2$ hopping and exchange
  We review some recent progresses in study of the 1D strongly correlated electron systems of long range hopping and exchange. The systems are completely integrable, with infinite number of constants of motions. The results of the physical properties, such as wavefunctions, the full excitation spectrum and the thermodynamics, are also reviewed. 
C. Gruber and D. F. Wang