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An Explicit Derivation of the Möbius Function for Bruhat Order
- Author(s): Jones, Brant C.
- et al.
Published Web Locationhttps://doi.org/10.1007/s11083-009-9128-6
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 Möbius function, recovering a classical result due to Verma.