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Speaker:
Nathan Reading, (University of Michigan)
In this talk we study noncrossing partitions by way of the Coxeter plane, a certain plane fixed (as a set) by the action of c. We give a general recursive formula for counting maximal chains in noncrossing partition lattices. We also show how the planar diagrams for classical noncrossing partitions and their counterparts of types B and D arise from a uniform construction, rather than in an ad hoc manner and discuss this construction in the case of the exceptional groups. The talk requires no prior knowledge, on the part of the audience, of Coxeter groups or noncrossing partitions. |
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