An explicit derivation of the Mobius function for Bruhat order
- Author(s): Jones, Brant C.
- et al.
Published Web Locationhttps://arxiv.org/pdf/0904.4472.pdf
We give an explicit nonrecursive complete matching for the Hasse diagram of the strong Bruhat order of any interval in any Coxeter group. This yields a new derivation of the Mobius function, recovering a classical result due to Verma.