%0 Journal Article
%T Double Bruhat cells and total positivity
%A Sergey Fomin
%A Andrei Zelevinsky
%J Mathematics
%D 1998
%I arXiv
%X We study intersections of opposite Bruhat cells in a semisimple complex Lie group, and associated totally nonnegative varieties.
%U http://arxiv.org/abs/math/9802056v1