On 12.05.2006 at 12:20 in S5, there is the following noon lecture:
Symmetry properties of statistics of lattice paths in ladders
We show that certain statistics on lattice paths going from the bottom left corner to the top right corner of a given ladder region are equidistributed. For example, the number of lattice paths with k bottom and l top contacts equals the number of lattice paths in the same region with l bottom and k top contacts.
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