  We study the bosonization of massless fermions in three-dimensional
space-time. Using the path-integral approach as well as the operator formalism,
we investigate new duality relations between fermionic and bosonic theories. In
particular, we show that a theory of massless fermions is dual to three
different, but equivalent bosonic theories which are quadratic in the bosonic
fields: a non-local Maxwell- Chern-Simons-type theory, a non-local
self-dual-type vector theory, and a local free massless bosonic theory. The
equivalence is proven at the level of current correlation functions and current
algebra analysis.
