Fuzzy Torus in Matrix Model
  We have calculated the free energy up to two loop to compare T^2 with T^4 in IIB matrix model. It turns out that T^2 has smaller free energy than T^4. We have also discussed the generation of the gauge group by considering k-coincident fuzzy tori and found that in this case U(1) gauge group is favored. This means that if the true vacuum is four-dimensional, it is not a simple fuzzy space considered here. 
Subrata Bal (RIKEN), Masanori Hanada, Hikaru Kawai, Fukuichiro Kubo   (Kyoto Univ.)