%0 Journal Article %A Ramadoss, Ajay C. %T On the nonexistence of certain morphisms from Grassmannian to Grassmannian in characteristic $0$ %J Documenta mathematica %D 2009 %P 67-113 %V 14 %I mathdoc %U http://geodesic.mathdoc.fr/item/DOCMA_2009__14__a24/ %G en %F DOCMA_2009__14__a24