Catalan number - PowerPoint PPT Presentation

More Counting by Mapping

More Counting by Mapping. Lecture 16: Nov 7. This Lecture. Division rule Catalan number. 2. Division Rule. If a function from A to B is k -to-1 , meaning that each element in B is mapped by exactly k elements in A then (This generalizes the Bijection Rule.). e.g.

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The double-dimer model and skew Young diagrams

The double-dimer model and skew Young diagrams. Richard W. Kenyon David B. Wilson Brown University Microsoft Research. TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A A A A A A A A A A A. The double-dimer model. Kasteleyn matrix. 1.

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411 views • 26 slides

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