Morava K-theory dimension formula conjecture for real Grassmannians

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Let n≥1n\geq 1, let ϵ\epsilon be 00 or 11, and let l≥0l\geq 0. Set m=2n+1−ϵ+2lm=2^{n+1}-\epsilon+2l, and let kn(Gr⁡d(Rm))k_n(\operatorname{Gr}_d({\mathbb R}^m)) denote the dimension of K(n)∗(Gr⁡d(Rm))K(n)^*(\operatorname{Gr}_d({\mathbb R}^m)) over K(n)∗K(n)_*. Morava K-theory dimension formula conjecture.

kn(Gr⁡d(Rm))=∑i=0⌊d/2⌋(2n+1−ϵd−2i)(li).k_n(\operatorname{Gr}_d({\mathbb R}^m))=\sum_{i=0}^{\left\lfloor d/2\right\rfloor}\binom{2^{n+1}-\epsilon}{d-2i}\binom{l}{i}.

This conjecture would sharpen the proved lower bound for Morava K-theory of real Grassmannians and is motivated by the conjectural calculation of their QnQ_n-homology. It remains open.

References

Primary source

Nicholas J. Kuhn and Christopher J. R. Lloyd, “Computing the Morava K-theory of real Grassmanians using chromatic fixed point theory”, arXiv:2111.08812 (2021).

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