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Jang Soo Kim (김장수), Longest elements in a semigroup of functions and Slater indices
The group \( S_n \) of permutations on \(=\{1,2,\dots,n\} \) is generated by simple transpositions \( s_i = (i,i+1) \). The length \( \ell(\pi) \) of a permutation \( \pi …