Quantum Number Fractionalization in Antiferromagnets
  This is a pedagogical introduction to the mathematics of 1-dimensional spin-1/2 antiferromagnets. Topics covered include the Haldane-Shastry Hamiltonian, vector ``supercharges'', conserved spin currents, spinons, the supersymmetric Kuramoto-Yokoyama Hamiltonian, and holons. 
R. B. Laughlin (Stanford), D. Giuliano (Napoli), R. Caracciolo   (Torino), O. White (Oxford)