摘要
Recently, much progress has been made toward the Hamiltonian reductions of the two-dimensional WZNW theory. The remarkable point is that such reductions give a unified description of many known and unforeknown two-dimensional integrable field theories, and that while using the WZNW field to parametrize the solutions of these integrable systems, the apparant singularities arising from the improper choices of coordinate systems can be removed.
