Postovane kolege, podsecam vas da ce u petak 17.04. u 11 h na Institutu za fiziku u sali 300, Branislav Sazdovic odrzati nastavak seminara pod naslovom "T-dualnost u teoriji zatvorene strune". Pozdrav Branislav -- Institute of Physics Belgrade Pregrevica 118, 11080 Belgrade, Serbia http://www.ipb.ac.rs/