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Results tagged with permutations
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user 56047
Questions related to permutations, bijections from a finite (or sometimes infinite) set to itself.
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genus zero permutation and noncrossing partition
1,2,3, \cdots n)$ have a total of $n+1$ cycles, the largest possible (the permutations u are called permutations of genus 0)
and the solution in this book is
A coding of planar maps due to … But I do not understand why these and only these permutations have genus 0. …
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