Abelian-Projected Effective Gauge Theory of QCD with Asymptotic Freedom   and Quark Confinement
  We give an outline of a recent proof that the low-energy effective gauge theory exhibiting quark confinement due to magnetic monopole condensation can be derived from QCD without any specific assumption. We emphasize that the low-energy effective abelian gauge theories obtained here give the dual description of the same physics in the low-energy region. They show that the QCD vacuum is nothing but the dual (type II) superconductor. 
Kei-Ichi Kondo (Chiba Univ., Japan)