Seminarium z Topologii Algebraicznej
Wtorki, 12:15-13:45, sala 4070
29 października 2013
Wojciech Lubawski
Extending maps to homotopy colimits
We develop a cohomological obstruction theory for lifting maps from homotopy
colimits over a fibration. We apply it to show existence of several maps
BU_n -> BU_m that are not induced by homomorphisms of the underlying unitary
groups.
Strona seminarium