The $p$-primary subgroups of the cohomology of $BP{U}_n$ in dimensions less than $2p+5$

Xing Gu, Yu Zhang, Zhilei Zhang +1

Let $P{U}_n$ the projective unitary group of rank $n$ and $BP{U}_n$ its classifying space. For an odd prime $p$, we extend previous results to a compete description of $H^s(BPU_n;\math…