Alexander Voronov at MSRI - Semisimplicity of orbifold vertex algebras

<BODY> MSRI Streaming Video Series <BR> Alexander Voronov - Semisimplicity of orbifold vertex algebras <BR> <center> A PDF version of the lecture notes is available <A HREF="http://www.msri.org/publications/ln/msri/2002/ssymmetry/voronov/1/meta/aux/voronov.pdf">here</A>. </center> </BODY>