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Extending maps to homotopy colimits
- Speaker(s)
- Wojciech Lubawski
- Affiliation
- TCS UJ
- Date
- Oct. 29, 2013, 12:15 p.m.
- Room
- room 4070
- Seminar
- Seminar Algebraic Topology
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.
