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arxiv: math/0503007 · v1 · submitted 2005-03-01 · 🧮 math.CO · math.GR

Shellability of noncrossing partition lattices

classification 🧮 math.CO math.GR
keywords latticesnoncrossingshellabilitytypeassociatedcase-freeel-shellableexceptional
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We give a case-free proof that the lattice of noncrossing partitions associated to any finite real reflection group is EL-shellable. Shellability of these lattices was open for the groups of type $D_n$ and those of exceptional type and rank at least three.

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